Jan Keller

High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency

Keller, Jan; Kiselman, Klara; Donzel-Gargand, Olivier; Martin, Natalia M. et al.

Part of Nature Energy, p. 467-478, 2024

• DOI for High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency
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Silver Alloying in Highly Efficient CuGaSe₂ Solar Cells with Different Buffer Layers

Keller, Jan; Stolt, Lars; Törndahl, Tobias; Edoff, Marika

Part of Solar RRL, 2023

• DOI for Silver Alloying in Highly Efficient CuGaSe₂ Solar Cells with Different Buffer Layers
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Wide-Gap Chalcopyrite Solar Cells with Indium Oxide-Based Transparent Back Contacts

Keller, Jan; Stolt, Lars; Donzel-Gargand, Olivier; Kubart, Tomas et al.

Part of Solar RRL, 2022

• DOI for Wide-Gap Chalcopyrite Solar Cells with Indium Oxide-Based Transparent Back Contacts
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Rubidium Fluoride Absorber Treatment for Wide-Gap (Ag,Cu)(In,Ga)Se-2 Solar Cells

Keller, Jan; Aboulfadl, Hisham; Stolt, Lars; Donzel-Gargand, Olivier et al.

Part of Solar RRL, 2022

• DOI for Rubidium Fluoride Absorber Treatment for Wide-Gap (Ag,Cu)(In,Ga)Se-2 Solar Cells
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Wide‐gap (Ag,Cu)(In,Ga)Se₂ solar cells with different buffer materials—A path to a better heterojunction

Keller, Jan; Sopiha, Kostiantyn V.; Stolt, Olof; Stolt, Lars et al.

Part of Progress in Photovoltaics, p. 237-250, 2020

• DOI for Wide‐gap (Ag,Cu)(In,Ga)Se₂ solar cells with different buffer materials—A path to a better heterojunction

Thermodynamic stability, phase separation and Ag grading in (Ag,Cu)(In,Ga)Se-2 solar absorbers

Sopiha, Kostiantyn; Larsen, Jes K; Donzel-Gargand, Olivier; Khavari, Faraz et al.

Part of Journal of Materials Chemistry A, p. 8740-8751, 2020

• DOI for Thermodynamic stability, phase separation and Ag grading in (Ag,Cu)(In,Ga)Se-2 solar absorbers
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Bifacial Cu(In,Ga)Se₂ solar cells using hydrogen‐doped In₂O₃ films as a transparent back contact

Keller, Jan; Chen, Wei-Chao; Riekehr, Lars; Kubart, Tomas et al.

Part of Progress in Photovoltaics, p. 846-858, 2018

• DOI for Bifacial Cu(In,Ga)Se₂ solar cells using hydrogen‐doped In₂O₃ films as a transparent back contact

Record 1.0 V open-circuit voltage in wide band gap chalcopyrite solar cells

Larsson, Fredrik; Shariati, M. Nina; Keller, Jan; Frisk, Christopher et al.

Part of Progress in Photovoltaics, p. 755-763, 2017

• DOI for Record 1.0 V open-circuit voltage in wide band gap chalcopyrite solar cells

Functional off-stoichiometry in Cu(In,Ga)Se₂. Part I: topotactic continuum of ordered defect compounds

Sopiha, Kostiantyn; Keller, Jan; Persson, Clas; Scragg, Jonathan J. et al.

Part of Journal of Materials Chemistry A, p. 8072-8087, 2026

• DOI for Functional off-stoichiometry in Cu(In,Ga)Se₂. Part I: topotactic continuum of ordered defect compounds
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Functional off-stoichiometry in Cu(In,Ga)Se₂. Part II: electronic properties in a wide range of compositions

Sopiha, Kostiantyn; Keller, Jan; Persson, Clas; Scragg, Jonathan J. et al.

Part of Journal of Materials Chemistry A, p. 8088-8099, 2026

• DOI for Functional off-stoichiometry in Cu(In,Ga)Se₂. Part II: electronic properties in a wide range of compositions
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Near 13% Efficient Semitransparent Cu(In,Ga)S ₂ Solar Cells With Band Gap of 1.6 eV on Transparent Back Contact

Kaur, Kulwinder; Oli, Arivazhagan Valluvar; Melchiorre, Michele; Hempel, Wolfram et al.

Part of Progress in Photovoltaics, 2026

• DOI for Near 13% Efficient Semitransparent Cu(In,Ga)S ₂ Solar Cells With Band Gap of 1.6 eV on Transparent Back Contact

Titanium-Doped In₂O₃: A High-Mobility, Thermally Stable Back Contact for Bifacial Chalcopyrite Solar Cells

Keller, Jan; Mudgal, Sapna; Jurado-Estrada, Ana; Togay, Mustafa et al.

Part of Solar RRL, 2026

• DOI for Titanium-Doped In₂O₃: A High-Mobility, Thermally Stable Back Contact for Bifacial Chalcopyrite Solar Cells
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How ALD Settings May Affect the Chemical Structure of the (Zn_1–xSn_x)O_y/Wide-Gap (Ag,Cu)GaSe₂ Thin-Film Solar Cell Interface

Demling, Angelika; Keller, Jan; Wilks, Regan G.; Hägglund, Carl et al.

Part of ACS Applied Materials and Interfaces, p. 6180-6190, 2026

• DOI for How ALD Settings May Affect the Chemical Structure of the (Zn_1–xSn_x)O_y/Wide-Gap (Ag,Cu)GaSe₂ Thin-Film Solar Cell Interface
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Functional off-stoichiometry in Cu(In,Ga)Se₂. Part I: topotactic continuum of ordered defect compounds

Sopiha, Kostiantyn; Keller, Jan; Persson, Clas; Scragg, Jonathan J. et al.

Part of Journal of Materials Chemistry A, p. 8072-8087, 2026

• DOI for Functional off-stoichiometry in Cu(In,Ga)Se₂. Part I: topotactic continuum of ordered defect compounds
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Functional off-stoichiometry in Cu(In,Ga)Se₂. Part II: electronic properties in a wide range of compositions

Sopiha, Kostiantyn; Keller, Jan; Persson, Clas; Scragg, Jonathan J. et al.

Part of Journal of Materials Chemistry A, p. 8088-8099, 2026

• DOI for Functional off-stoichiometry in Cu(In,Ga)Se₂. Part II: electronic properties in a wide range of compositions
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Near 13% Efficient Semitransparent Cu(In,Ga)S ₂ Solar Cells With Band Gap of 1.6 eV on Transparent Back Contact

Kaur, Kulwinder; Oli, Arivazhagan Valluvar; Melchiorre, Michele; Hempel, Wolfram et al.

Part of Progress in Photovoltaics, 2026

• DOI for Near 13% Efficient Semitransparent Cu(In,Ga)S ₂ Solar Cells With Band Gap of 1.6 eV on Transparent Back Contact

Titanium-Doped In₂O₃: A High-Mobility, Thermally Stable Back Contact for Bifacial Chalcopyrite Solar Cells

Keller, Jan; Mudgal, Sapna; Jurado-Estrada, Ana; Togay, Mustafa et al.

Part of Solar RRL, 2026

• DOI for Titanium-Doped In₂O₃: A High-Mobility, Thermally Stable Back Contact for Bifacial Chalcopyrite Solar Cells
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How ALD Settings May Affect the Chemical Structure of the (Zn_1–xSn_x)O_y/Wide-Gap (Ag,Cu)GaSe₂ Thin-Film Solar Cell Interface

Demling, Angelika; Keller, Jan; Wilks, Regan G.; Hägglund, Carl et al.

Part of ACS Applied Materials and Interfaces, p. 6180-6190, 2026

• DOI for How ALD Settings May Affect the Chemical Structure of the (Zn_1–xSn_x)O_y/Wide-Gap (Ag,Cu)GaSe₂ Thin-Film Solar Cell Interface
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Zn_1-xSn_xO_y Buffer Layer Deposited by Chemical Bath Deposition for Low and Wide Bandgap Cu(In, Ga)Se₂ Solar Cells

Garzon, Diego A.; Cerqueira, Rafael; Almeida Alves, Cristiana F.; Moura, Ana Margarida et al.

Part of Advanced Energy & Sustainability Research, 2026

• DOI for Zn_1-xSn_xO_y Buffer Layer Deposited by Chemical Bath Deposition for Low and Wide Bandgap Cu(In, Ga)Se₂ Solar Cells
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Enhancing photocurrent collection in wide-gap ACIGS solar cells

Diethelm, Matthias; Mitmit, Ceren; Hägglund, Carl; Dimitrievska, Mirjana et al.

Part of Journal of Physics, 2026

• DOI for Enhancing photocurrent collection in wide-gap ACIGS solar cells
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Studying the Impact of Impurities on the Performance of Cadmium‐Free all Sputtered CIGS Solar Cells Using Titanium–Tungsten Barrier

Upreti, Tanvi; Keller, Jan; Vines, Lasse; Israr‐Qadir, Muhammad et al.

Part of Solar RRL, 2025

• DOI for Studying the Impact of Impurities on the Performance of Cadmium‐Free all Sputtered CIGS Solar Cells Using Titanium–Tungsten Barrier
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Rubidium Fluoride Absorber Treatment for Wide‐Gap and Bifacial Ag(In,Ga)Se₂ Solar Cells

Keller, Jan; Mudgal, Sapna; Martin, Natalia M.; Donzel-Gargand, Olivier et al.

Part of Solar RRL, 2025

• DOI for Rubidium Fluoride Absorber Treatment for Wide‐Gap and Bifacial Ag(In,Ga)Se₂ Solar Cells
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Ultrathin AlO_x Films for Back Contact Passivation in Bifacial Wide‐Gap (Ag,Cu)(In,Ga)Se₂ Solar Cells

Keller, Jan; Mudgal, Sapna; Hägglund, Carl; Kiselman, Klara et al.

Part of Solar RRL, 2025

• DOI for Ultrathin AlO_x Films for Back Contact Passivation in Bifacial Wide‐Gap (Ag,Cu)(In,Ga)Se₂ Solar Cells
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Light-Soaking Effects in High-Efficiency Cu(In,Ga)Se₂ and (Ag,Cu)(In,Ga)Se₂ Solar Cells

Kiselman, Klara; Keller, Jan; Pearson, Patrick; Sopiha, Kostiantyn et al.

Part of Progress in Photovoltaics, p. 735-746, 2025

• DOI for Light-Soaking Effects in High-Efficiency Cu(In,Ga)Se₂ and (Ag,Cu)(In,Ga)Se₂ Solar Cells
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Extended thermal admittance spectroscopy for the investigation of composition-dependent meta-stability behaviours in wide-gap (Ag,Cu)(In,Ga)Se₂ solar cells

Pearson, Patrick; Keller, Jan; Carron, Romain; Platzer Björkman, Charlotte

Part of Journal of Physics, 2025

• DOI for Extended thermal admittance spectroscopy for the investigation of composition-dependent meta-stability behaviours in wide-gap (Ag,Cu)(In,Ga)Se₂ solar cells
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Effects of Al₂O₃ Rear Interface Passivation on the Performance of Bifacial Kesterite‐Based Solar Cells with Fluorine‐Doped Tin Dioxide Back Contact

Sawa, Hezekiah B.; Babucci, Melike; Keller, Jan; Platzer Björkman, Charlotte et al.

Part of Physica Status Solidi (B), 2024

• DOI for Effects of Al₂O₃ Rear Interface Passivation on the Performance of Bifacial Kesterite‐Based Solar Cells with Fluorine‐Doped Tin Dioxide Back Contact

Bifacial Wide‐Gap (Ag,Cu)(In,Ga)Se₂ Solar Cell with 13.6% Efficiency Using In₂O₃:W as a Back Contact Material

Keller, Jan; Stolt, Lars; Donzel-Gargand, Olivier; Violas, André F. et al.

Part of Solar RRL, 2024

• DOI for Bifacial Wide‐Gap (Ag,Cu)(In,Ga)Se₂ Solar Cell with 13.6% Efficiency Using In₂O₃:W as a Back Contact Material
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Ag-Dependent Behavior Threshold and Metastability in Wide-Gap (Ag,Cu)(In,Ga)Se₂ Solar Cells

Pearson, Patrick; Keller, Jan; Stolt, Lars; Donzel-Gargand, Olivier et al.

Part of Solar RRL, 2024

• DOI for Ag-Dependent Behavior Threshold and Metastability in Wide-Gap (Ag,Cu)(In,Ga)Se₂ Solar Cells
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High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency

Keller, Jan; Kiselman, Klara; Donzel-Gargand, Olivier; Martin, Natalia M. et al.

Part of Nature Energy, p. 467-478, 2024

• DOI for High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency
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Effect of Ordered Vacancy Compounds on the Carrier Collection in Wide‐Gap (Ag,Cu)(In,Ga)Se₂ Solar Cells

Keller, Jan; Martin, Natalia M.; Donzel-Gargand, Olivier; Kiselman, Klara et al.

Part of Solar RRL, 2024

• DOI for Effect of Ordered Vacancy Compounds on the Carrier Collection in Wide‐Gap (Ag,Cu)(In,Ga)Se₂ Solar Cells
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Enhanced performance of Cu₂ZnSnS₄ based bifacial solar cells with FTO and W/FTO back contacts through absorber air annealing and Na incorporation

Sawa, Hezekiah B.; Babucci, Melike; Donzel-Gargand, Olivier; Pearson, Patrick et al.

Part of Solar Energy Materials and Solar Cells, 2024

• DOI for Enhanced performance of Cu₂ZnSnS₄ based bifacial solar cells with FTO and W/FTO back contacts through absorber air annealing and Na incorporation

Toward improving the performance of Cu₂ZnSnS₄-based solar cells with Zr, W or sulfurized layers at the SnO₂:F/Cu₂ZnSnS₄ rear interface

Sawa, Hezekiah B.; Babucci, Melike; Keller, Jan; Platzer Björkman, Charlotte et al.

Part of Thin Solid Films, 2024

• DOI for Toward improving the performance of Cu₂ZnSnS₄-based solar cells with Zr, W or sulfurized layers at the SnO₂:F/Cu₂ZnSnS₄ rear interface

Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se-2 Thin-Film Solar Cells

Pearson, Patrick; Keller, Jan; Stolt, Lars; Platzer Björkman, Charlotte

Part of Physica Status Solidi (B), 2023

• DOI for Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se-2 Thin-Film Solar Cells
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Sn_1-xGe_xO_y and Zn_1-xGe_xO_y by Atomic Layer Deposition-Growth Dynamics, Film Properties, and Compositional Tuning for Charge Selective Transport in (Ag,Cu)(In,Ga)Se₂ Solar Cells

Hultqvist, Adam; Keller, Jan; Martin, Natalia M.; Larsson, Fredrik et al.

Part of ACS Applied Energy Materials, p. 9824-9836, 2023

• DOI for Sn_1-xGe_xO_y and Zn_1-xGe_xO_y by Atomic Layer Deposition-Growth Dynamics, Film Properties, and Compositional Tuning for Charge Selective Transport in (Ag,Cu)(In,Ga)Se₂ Solar Cells
• Download full text (pdf) of Sn_1-xGe_xO_y and Zn_1-xGe_xO_y by Atomic Layer Deposition-Growth Dynamics, Film Properties, and Compositional Tuning for Charge Selective Transport in (Ag,Cu)(In,Ga)Se₂ Solar Cells

Depth-Dependent Atomic-Scale Structural Changes in (Ag,Cu)(In,Ga)Se₂ Absorbers Relevant for Thin-Film Solar Cells

Babucci, Melike; Meira, Debora M.; Wallin, Erik; Keller, Jan et al.

Part of ACS Applied Energy Materials, p. 9264-9275, 2023

• DOI for Depth-Dependent Atomic-Scale Structural Changes in (Ag,Cu)(In,Ga)Se₂ Absorbers Relevant for Thin-Film Solar Cells

Silver Alloying in Highly Efficient CuGaSe₂ Solar Cells with Different Buffer Layers

Keller, Jan; Stolt, Lars; Törndahl, Tobias; Edoff, Marika

Part of Solar RRL, 2023

• DOI for Silver Alloying in Highly Efficient CuGaSe₂ Solar Cells with Different Buffer Layers
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Post‐deposition sulfurization of CuInSe₂ solar absorbers by employing sacrificial CuInS₂ precursor layers

Khavari, Faraz; Saini, Nishant; Keller, Jan; Larsen, Jes K. et al.

Part of Physica Status Solidi (A), 2022

• DOI for Post‐deposition sulfurization of CuInSe₂ solar absorbers by employing sacrificial CuInS₂ precursor layers
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The Effect of Absorber Stoichiometry on the Stability of Widegap (Ag,Cu)(In,Ga)Se₂ Solar Cells

Pearson, Patrick; Keller, Jan; Stolt, Lars; Edoff, Marika et al.

Part of Physica Status Solidi (B), 2022

• DOI for The Effect of Absorber Stoichiometry on the Stability of Widegap (Ag,Cu)(In,Ga)Se₂ Solar Cells
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Off-stoichiometry in I-III-VI2 chalcopyrite absorbers: a comparative analysis of structures and stabilities

Sopiha, Kostiantyn; Larsen, Jes K.; Keller, Jan; Edoff, Marika et al.

Part of Faraday discussions, p. 357-374, 2022

• DOI for Off-stoichiometry in I-III-VI2 chalcopyrite absorbers: a comparative analysis of structures and stabilities
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Wide-Gap Chalcopyrite Solar Cells with Indium Oxide-Based Transparent Back Contacts

Keller, Jan; Stolt, Lars; Donzel-Gargand, Olivier; Kubart, Tomas et al.

Part of Solar RRL, 2022

• DOI for Wide-Gap Chalcopyrite Solar Cells with Indium Oxide-Based Transparent Back Contacts
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Rubidium Fluoride Absorber Treatment for Wide-Gap (Ag,Cu)(In,Ga)Se-2 Solar Cells

Keller, Jan; Aboulfadl, Hisham; Stolt, Lars; Donzel-Gargand, Olivier et al.

Part of Solar RRL, 2022

• DOI for Rubidium Fluoride Absorber Treatment for Wide-Gap (Ag,Cu)(In,Ga)Se-2 Solar Cells
• Download full text (pdf) of Rubidium Fluoride Absorber Treatment for Wide-Gap (Ag,Cu)(In,Ga)Se-2 Solar Cells

Long term stability and recovery of 3 MeV proton irradiated Cu(In,Ga)Se₂ and Cu₂ (Zn,Sn)(S,Se)₄ thin film solar cells

Pearson, Patrick; Keller, Jan; Larsen, Jes; Kosyak, Volodymyr et al.

Part of Thin Solid Films, 2022

• DOI for Long term stability and recovery of 3 MeV proton irradiated Cu(In,Ga)Se₂ and Cu₂ (Zn,Sn)(S,Se)₄ thin film solar cells
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Effects of material properties of band-gap-graded Cu(In,Ga)Se-2 thin films on the onset of the quantum efficiency spectra of corresponding solar cells

Thomas, Sinju; Bertram, Tobias; Kaufmann, Christian; Kodalle, Tim et al.

Part of Progress in Photovoltaics, p. 1238-1246, 2022

• DOI for Effects of material properties of band-gap-graded Cu(In,Ga)Se-2 thin films on the onset of the quantum efficiency spectra of corresponding solar cells
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Investigation of AgGaSe₂ as a Wide Gap Solar Cell Absorber

Larsen, Jes Kipkoech; Donzel-Gargand, Olivier; Sopiha, Kostiantyn V.; Keller, Jan et al.

Part of ACS Applied Energy Materials, p. 1805-1814, 2021

• DOI for Investigation of AgGaSe₂ as a Wide Gap Solar Cell Absorber
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Alkali Dispersion in (Ag,Cu)(In,Ga)Se-2 Thin Film Solar Cells-Insight from Theory and Experiment

Aboulfadl, Hisham; Sopiha, Kostiantyn; Keller, Jan; Larsen, Jes K et al.

Part of ACS Applied Materials and Interfaces, p. 7188-7199, 2021

• DOI for Alkali Dispersion in (Ag,Cu)(In,Ga)Se-2 Thin Film Solar Cells-Insight from Theory and Experiment
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Interface engineering of ultrathin Cu(In,Ga)Se₂ solar cells on reflective back contacts

Gouillart, Louis; Cattoni, Andrea; Chen, Wei-Chao; Goffard, Julie et al.

Part of Progress in Photovoltaics, p. 212-221, 2021

• DOI for Interface engineering of ultrathin Cu(In,Ga)Se₂ solar cells on reflective back contacts

Ultrathin Solar Cells Based on Atomic Layer Deposition of Cubic versus Orthorhombic Tin Monosulfide

Voznyi, Andrii A.; Bilousov, Oleksandr V.; Landeke-Wilsmark, Björn; Keller, Jan et al.

Part of ACS Applied Energy Materials, p. 8085-8097, 2021

• DOI for Ultrathin Solar Cells Based on Atomic Layer Deposition of Cubic versus Orthorhombic Tin Monosulfide
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Performance Limitations of Wide-Gap (Ag,Cu)(In,Ga)Se₂ Thin-Film Solar Cells

Keller, Jan; Pearson, Patrick; Shariati Nilsson, Nina; Stolt, Olof et al.

Part of Solar RRL, 2021

• DOI for Performance Limitations of Wide-Gap (Ag,Cu)(In,Ga)Se₂ Thin-Film Solar Cells
• Download full text (pdf) of Performance Limitations of Wide-Gap (Ag,Cu)(In,Ga)Se₂ Thin-Film Solar Cells

Comparison of Sulfur Incorporation into CuInSe(2)and CuGaSe(2)Thin-Film Solar Absorbers

Khavari, Faraz; Keller, Jan; Larsen, Jes K; Sopiha, Kostiantyn et al.

Part of Physica Status Solidi (A), 2020

• DOI for Comparison of Sulfur Incorporation into CuInSe(2)and CuGaSe(2)Thin-Film Solar Absorbers
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Wide‐gap (Ag,Cu)(In,Ga)Se₂ solar cells with different buffer materials—A path to a better heterojunction

Keller, Jan; Sopiha, Kostiantyn V.; Stolt, Olof; Stolt, Lars et al.

Part of Progress in Photovoltaics, p. 237-250, 2020

• DOI for Wide‐gap (Ag,Cu)(In,Ga)Se₂ solar cells with different buffer materials—A path to a better heterojunction

Heavy Alkali Treatment of Post‐Sulfurized Cu(In,Ga)Se₂ Layers: Effect on Absorber Properties and Solar Cell Performance

Keller, Jan; Bilousov, Oleksandr. V.; Neerken, Janet; Wallin, Erik et al.

Part of Solar RRL, 2020

• DOI for Heavy Alkali Treatment of Post‐Sulfurized Cu(In,Ga)Se₂ Layers: Effect on Absorber Properties and Solar Cell Performance
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On the Paramount Role of Absorber Stoichiometry in (Ag,Cu)(In,Ga)Se₂ Wide‐Gap Solar Cells

Keller, Jan; Stolt, Lars; Sopiha, Kostiantyn; Larsen, Jes K et al.

Part of Solar RRL, 2020

• DOI for On the Paramount Role of Absorber Stoichiometry in (Ag,Cu)(In,Ga)Se₂ Wide‐Gap Solar Cells
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Atomic Layer Deposition of Ternary Compounds on Cu(In,Ga)Se₂: An In Situ Quartz Crystal Microbalance Study

Larsson, Fredrik; Stolt, Lars; Hultqvist, Adam; Edoff, Marika et al.

Part of ACS Applied Energy Materials, p. 7208-7215, 2020

• DOI for Atomic Layer Deposition of Ternary Compounds on Cu(In,Ga)Se₂: An In Situ Quartz Crystal Microbalance Study

Amorphous tin-gallium oxide buffer layers in (Ag,Cu)(In,Ga)Se₂ solar cells

Larsson, Fredrik; Keller, Jan; Olsson, Jörgen; Donzel-Gargand, Olivier et al.

Part of Solar Energy Materials and Solar Cells, 2020

• DOI for Amorphous tin-gallium oxide buffer layers in (Ag,Cu)(In,Ga)Se₂ solar cells
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Close-spaced sublimation of SnS absorber layers and SnS/CdS heterojunction solar cells with Mo and Ti back metal contacts

Voznyi, Andrii; Kosyak, Volodymyr; Yeromenko, Yurii; Keller, Jan et al.

Part of Thin Solid Films, 2020

• DOI for Close-spaced sublimation of SnS absorber layers and SnS/CdS heterojunction solar cells with Mo and Ti back metal contacts

Reflective Back Contacts for Ultrathin Cu(In,Ga)Se₂-Based Solar Cells

Gouillart, Louis; Chen, Wei-Chao; Cattoni, Andrea; Goffard, Julie et al.

Part of IEEE Journal of Photovoltaics, p. 250-254, 2020

• DOI for Reflective Back Contacts for Ultrathin Cu(In,Ga)Se₂-Based Solar Cells

Thermodynamic stability, phase separation and Ag grading in (Ag,Cu)(In,Ga)Se-2 solar absorbers

Sopiha, Kostiantyn; Larsen, Jes K; Donzel-Gargand, Olivier; Khavari, Faraz et al.

Part of Journal of Materials Chemistry A, p. 8740-8751, 2020

• DOI for Thermodynamic stability, phase separation and Ag grading in (Ag,Cu)(In,Ga)Se-2 solar absorbers
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Antimony-Doped Tin Oxide as Transparent Back Contact in Cu₂ZnSnS₄ Thin-Film Solar Cells

Englund, Sven; Kubart, Tomas; Keller, Jan; Moro, Marcos V. et al.

Part of Physica Status Solidi (A), 2019

• DOI for Antimony-Doped Tin Oxide as Transparent Back Contact in Cu₂ZnSnS₄ Thin-Film Solar Cells
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Germanium Incorporation in Cu₂ZnSnS₄ and Formation of a Sn–Ge Gradient

Saini, Nishant; Larsen, Jes K.; Sopiha, Kostiantyn V.; Keller, Jan et al.

Part of Physica Status Solidi (A), 2019

• DOI for Germanium Incorporation in Cu₂ZnSnS₄ and Formation of a Sn–Ge Gradient
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Effect of Cu content on post‐sulfurization of Cu(In,Ga)Se₂ films and corresponding solar cell performance

Keller, Jan; Bilousov, Oleksandr V.; Wallin, Erik; Lundberg, Olle et al.

Part of Physica Status Solidi (A), 2019

• DOI for Effect of Cu content on post‐sulfurization of Cu(In,Ga)Se₂ films and corresponding solar cell performance

Atomic layer deposition of amorphous tin-gallium oxide films

Larsson, Fredrik; Keller, Jan; Primetzhofer, Daniel; Riekehr, Lars et al.

Part of Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, 2019

• DOI for Atomic layer deposition of amorphous tin-gallium oxide films
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Effect of NaF pre-cursor on alumina and hafnia rear contact passivation layers in ultra-thin Cu(In,Ga)Se₂ solar cells

Ledinek, Dorothea; Keller, Jan; Hägglund, Carl; Chen, Wei-Chao et al.

Part of Thin Solid Films, p. 156-164, 2019

• DOI for Effect of NaF pre-cursor on alumina and hafnia rear contact passivation layers in ultra-thin Cu(In,Ga)Se₂ solar cells

Microstructural Characterization of Sulfurization Effects in Cu(In,Ga)Se-2 Thin Film Solar Cells

Aboulfadl, Hisham; Keller, Jan; Larsen, Jes K; Thuvander, Mattias et al.

Part of Microscopy and Microanalysis, p. 532-538, 2019

• DOI for Microstructural Characterization of Sulfurization Effects in Cu(In,Ga)Se-2 Thin Film Solar Cells

Effect of different Na supply methods on thin Cu(In,Ga)Se₂ solar cells with Al₂O₃ rear passivation layers

Ledinek, Dorothea; Donzel-Gargand, Olivier; Sköld, Markus; Keller, Jan et al.

Part of Solar Energy Materials and Solar Cells, p. 160-169, 2018

• DOI for Effect of different Na supply methods on thin Cu(In,Ga)Se₂ solar cells with Al₂O₃ rear passivation layers
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Atomic layer deposition of Zn(O,S) buffer layers for Cu(In,Ga)Se₂ solar cells with KF post-deposition treatment

Larsson, Fredrik; Donzel-Gargand, Olivier; Keller, Jan; Edoff, Marika et al.

Part of Solar Energy Materials and Solar Cells, p. 8-15, 2018

• DOI for Atomic layer deposition of Zn(O,S) buffer layers for Cu(In,Ga)Se₂ solar cells with KF post-deposition treatment

Using hydrogen‐doped In₂O₃ films as a transparent back contact in (Ag,Cu)(In,Ga)Se₂ solar cells

Keller, Jan; Shariati, Masumeh-Nina; Aijaz, Asim; Riekehr, Lars et al.

Part of Progress in Photovoltaics, p. 159-170, 2018

• DOI for Using hydrogen‐doped In₂O₃ films as a transparent back contact in (Ag,Cu)(In,Ga)Se₂ solar cells

Deep surface Cu depletion induced by K in high-efficiency Cu(In,Ga)Se2 solar cell absorbers

Donzel-Gargand, Olivier; Thersleff, Thomas; Keller, Jan; Törndahl, Tobias et al.

Part of Progress in Photovoltaics, p. 730-739, 2018

• DOI for Deep surface Cu depletion induced by K in high-efficiency Cu(In,Ga)Se2 solar cell absorbers
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Bifacial Cu(In,Ga)Se₂ solar cells using hydrogen‐doped In₂O₃ films as a transparent back contact

Keller, Jan; Chen, Wei-Chao; Riekehr, Lars; Kubart, Tomas et al.

Part of Progress in Photovoltaics, p. 846-858, 2018

• DOI for Bifacial Cu(In,Ga)Se₂ solar cells using hydrogen‐doped In₂O₃ films as a transparent back contact

Sulfurization of Co-Evaporated Cu(In,Ga)Se-2 as a Postdeposition Treatment

Larsen, Jes K; Keller, Jan; Lundberg, Olle; Jarmar, Tobias et al.

Part of IEEE Journal of Photovoltaics, p. 604-610, 2018

• DOI for Sulfurization of Co-Evaporated Cu(In,Ga)Se-2 as a Postdeposition Treatment
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Effect of KF absorber treatment on the functionality of different transparent conductive oxide layers in CIGSe solar cells

Keller, Jan; Chalvet, Francis; Joel, Jonathan; Aijaz, Asim et al.

Part of Progress in Photovoltaics, p. 13-23, 2018

• DOI for Effect of KF absorber treatment on the functionality of different transparent conductive oxide layers in CIGSe solar cells

Light-induced changes in the minority carrier diffusion length of Cu(In,Ga) Se-2 absorber material

Heise, S. J.; Gerliz, V.; Hammer, M. S.; Ohland, J. et al.

Part of Solar Energy Materials and Solar Cells, p. 270-276, 2017

• DOI for Light-induced changes in the minority carrier diffusion length of Cu(In,Ga) Se-2 absorber material

Investigation of the SnS/Cu₂ZnSnS₄ interfaces in Kesterite Thin-Film Solar Cells

Ren, Yi; Richter, Michael; Keller, Jan; Redinger, Alex et al.

Part of ACS Energy Letters, p. 976-981, 2017

• DOI for Investigation of the SnS/Cu₂ZnSnS₄ interfaces in Kesterite Thin-Film Solar Cells

Record 1.0 V open-circuit voltage in wide band gap chalcopyrite solar cells

Larsson, Fredrik; Shariati, M. Nina; Keller, Jan; Frisk, Christopher et al.

Part of Progress in Photovoltaics, p. 755-763, 2017

• DOI for Record 1.0 V open-circuit voltage in wide band gap chalcopyrite solar cells

Evaluation of different intrinsic ZnO and transparent conducting oxide layer combinations in Cu(In,Ga)Se₂ solar cells

Larsson, Fredrik; Keller, Jan; Edoff, Marika; Törndahl, Tobias

Part of Thin Solid Films, p. 235-238, 2017

• DOI for Evaluation of different intrinsic ZnO and transparent conducting oxide layer combinations in Cu(In,Ga)Se₂ solar cells

CdS and Zn1-xSnxOy buffer layers for CIGS solar cells

Salome, P. M. P.; Keller, Jan; Törndahl, Tobias; Teixeira, J. P. et al.

Part of Solar Energy Materials and Solar Cells, p. 272-281, 2017

• DOI for CdS and Zn1-xSnxOy buffer layers for CIGS solar cells

On the beneficial effect of Al₂O₃ front contact passivation in Cu(In,Ga)Se₂ solar cells

Keller, Jan; Gustavsson, Fredrik; Stolt, Lars; Edoff, Marika et al.

Part of Solar Energy Materials and Solar Cells, p. 189-196, 2017

• DOI for On the beneficial effect of Al₂O₃ front contact passivation in Cu(In,Ga)Se₂ solar cells

Cd and Cu Interdiffusion in Cu(In, Ga) Se-2/CdS Hetero-Interfaces

Salome, Pedro M. P.; Ribeiro-Andrade, Rodrigo; Teixeira, Jennifer P.; Keller, Jan et al.

Part of IEEE Journal of Photovoltaics, p. 858-863, 2017

• DOI for Cd and Cu Interdiffusion in Cu(In, Ga) Se-2/CdS Hetero-Interfaces

Influence of CdS and ZnSnO Buffer Layers on the Photoluminescence of Cu(In,Ga)Se-2 Thin Films

Salome, Pedro M. P.; Teixeira, Jennifer P.; Keller, Jan; Törndahl, Tobias et al.

Part of IEEE Journal of Photovoltaics, p. 670-675, 2017

• DOI for Influence of CdS and ZnSnO Buffer Layers on the Photoluminescence of Cu(In,Ga)Se-2 Thin Films

Atomic layer deposition of In₂O₃ transparent conductive oxide layers for application in Cu(In,Ga)Se₂ solar cells with different buffer layers

Keller, Jan; Stolt, Lars; Edoff, Marika; Törndahl, Tobias

Part of Physica Status Solidi (A), p. 1541-1552, 2016

• DOI for Atomic layer deposition of In₂O₃ transparent conductive oxide layers for application in Cu(In,Ga)Se₂ solar cells with different buffer layers

Direct comparison of atomic layer deposition and sputtering of In2O3:H used as transparent conductive oxide layer in CuIn1-xGaxSe2 thin film solar cells

Keller, Jan; Aijaz, Asim; Gustavsson, Fredrik; Kubart, Tomas et al.

Part of Solar Energy Materials and Solar Cells, p. 757-764, 2016

• DOI for Direct comparison of atomic layer deposition and sputtering of In2O3:H used as transparent conductive oxide layer in CuIn1-xGaxSe2 thin film solar cells

Deposition temperature induced conduction band changes in zinc tin oxide buffer layers for Cu(In,Ga)Se₂ solar cells

Lindahl, Johan; Keller, Jan; Donzel-Gargand, Olivier; Szaniawski, Piotr et al.

Part of Solar Energy Materials and Solar Cells, p. 684-690, 2016

• DOI for Deposition temperature induced conduction band changes in zinc tin oxide buffer layers for Cu(In,Ga)Se₂ solar cells
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Potential gain in photocurrent generation for Cu(In,Ga)Se2 solar cells by using In2O3 as a transparent conductive oxide layer

Keller, Jan; Lindahl, Johan; Edoff, Marika; Stolt, Lars et al.

Part of Progress in Photovoltaics, p. 102-107, 2016

• DOI for Potential gain in photocurrent generation for Cu(In,Ga)Se2 solar cells by using In2O3 as a transparent conductive oxide layer

Reduced interface recombination in Cu2ZnSnS4 solar cells with atomic layer deposition Zn1-xSnxO buffer layers

Platzer-Björkman, Charlotte; Frisk, Christoper; Larsen, Jes; Ericson, Tove et al.

Part of Applied Physics Letters, 2015

• DOI for Reduced interface recombination in Cu2ZnSnS4 solar cells with atomic layer deposition Zn1-xSnxO buffer layers
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Wide band-gap Cu-chalcopyrite/In-based transparent conductive oxide interfaces: What affects the gallium oxide formation and its properties?

Wilks, Regan G.; Demling, Angelika; Efimenko, Anna; Gorgoi, Mihaela et al.

Part of 2025 IEEE 53rd Photovoltaic Specialists Conference (PVSC), p. 1133-1133, 2025

• DOI for Wide band-gap Cu-chalcopyrite/In-based transparent conductive oxide interfaces: What affects the gallium oxide formation and its properties?

Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se2 Thin Film Solar Cells

Pearson, Patrick; Keller, Jan; Platzer-Björkman, Charlotte

Part of 2023 IEEE 50th Photovoltaic Specialists Conference (PVSC), 2023

• DOI for Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se2 Thin Film Solar Cells

Ultrathin Cu(In,Ga)Se2 solar cells with Ag-based reflective back contacts

Gouillart, Louis; Cattoni, Andrea; Chen, Wei-Chao; Zeitouny, Joya et al.

Part of 2020 47th IEEE Photovoltaic Specialists Conference (PVSC), p. 1481-1484, 2020

• DOI for Ultrathin Cu(In,Ga)Se2 solar cells with Ag-based reflective back contacts

ALD of Zn(O,S) buffer layers in KF post-deposition treated CIGS solar cells

Larsson, Fredrik; Keller, Jan; Edoff, Marika; Törndahl, Tobias

2017

Cu-depleted patches induced by presence of K during growth of CIGS absorbers

Donzel-Gargand, Olivier; Thersleff, T.; Keller, Jan; Törndahl, Tobias et al.

2017

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Influence of CdS and Zn_xSn_1-xO_y Buffer Layers on the Photoluminescence of Cu(In,Ga)Se₂ Thin Films

Leitao, J. P.; Teixeira, J. P.; Keller, Jan; Törndahl, Tobias et al.

Part of 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), p. 3068-3071, 2016

• DOI for Influence of CdS and Zn_xSn_1-xO_y Buffer Layers on the Photoluminescence of Cu(In,Ga)Se₂ Thin Films