Jan Keller

Uppsala University — Sweden

Engineering · Physical Sciences

28h-index3.7kcitations93works25.42yr avg
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Research Topics

Chalcogenide Semiconductor Thin Films(75), Quantum Dots Synthesis And Properties(63), Copper-based nanomaterials and applications(43), Semiconductor materials and interfaces(20), ZnO doping and properties(8)

Publications93 total

How ALD Settings May Affect the Chemical Structure of the (Zn <sub> 1– <i>x</i> </sub> Sn <sub> <i>x</i> </sub> )O <sub> <i>y</i> </sub> /Wide-Gap (Ag,Cu)GaSe <sub>2</sub> Thin-Film Solar Cell Interface
ACS Applied Materials & Interfaces·2026Open Access
Zn <sub> 1− <i>x</i> </sub> Sn <sub> <i>x</i> </sub> O <sub> <i>y</i> </sub> Buffer Layer Deposited by Chemical Bath Deposition for Low and Wide Bandgap Cu(In, Ga)Se <sub>2</sub> Solar Cells
Advanced Energy and Sustainability Research·2026Open Access
Functional off-stoichiometry in Cu(In,Ga)Se <sub>2</sub> . Part I: topotactic continuum of ordered defect compounds
Journal of Materials Chemistry A·2025· 2 citedOpen Access
Studying the Impact of Impurities on the Performance of Cadmium‐Free all Sputtered CIGS Solar Cells Using Titanium–Tungsten Barrier
Solar RRL·2025Open Access
Author response for "Functional Off-stoichiometry in Cu(In,Ga)Se&lt;sub&gt;2&lt;/sub&gt;. Part I: Topotactic Continuum of Ordered Defect Compounds"
2025
Rubidium Fluoride Absorber Treatment for Wide‐Gap and Bifacial Ag(In,Ga)Se<sub>2</sub> Solar Cells
Solar RRL·2025· 1 citedOpen Access
Wide band-gap Cu-chalcopyrite/In-based transparent conductive oxide interfaces: What affects the gallium oxide formation and its properties?
2025
Light‐Soaking Effects in High‐Efficiency Cu(In,Ga)Se<sub>2</sub> and (Ag,Cu)(In,Ga)Se<sub>2</sub> Solar Cells
Progress in Photovoltaics Research and Applications·2025· 2 citedOpen Access
Ultrathin AlO<sub>x</sub> Films for Back Contact Passivation in Bifacial Wide‐Gap (Ag,Cu)(In,Ga)Se<sub>2</sub> Solar Cells
Solar RRL·2025· 2 citedOpen Access
Effects of Al<sub>2</sub>O<sub>3</sub> Rear Interface Passivation on the Performance of Bifacial Kesterite‐Based Solar Cells with Fluorine‐Doped Tin Dioxide Back Contact
physica status solidi (b)·2024· 2 citedOpen Access
Bifacial Wide‐Gap (Ag,Cu)(In,Ga)Se<sub>2</sub>Solar Cell with 13.6% Efficiency Using In<sub>2</sub>O<sub>3</sub>:W as a Back Contact Material
Solar RRL·2024· 11 citedOpen Access
Ag‐Dependent Behavior Threshold and Metastability in Wide‐Gap (Ag,Cu)(In,Ga)Se<sub>2</sub> Solar Cells
Solar RRL·2024· 7 citedOpen Access
Toward improving the performance of Cu2ZnSnS4-based solar cells with Zr, W or sulfurized layers at the SnO2:F/Cu2ZnSnS4 rear interface
Thin Solid Films·2024· 4 cited
High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency
Nature Energy·2024· 337 citedOpen Access
Effect of Ordered Vacancy Compounds on the Carrier Collection in Wide‐Gap (Ag,Cu)(In,Ga)Se<sub>2</sub> Solar Cells
Solar RRL·2024· 13 citedOpen Access
Enhanced performance of Cu2ZnSnS4 based bifacial solar cells with FTO and W/FTO back contacts through absorber air annealing and Na incorporation
Solar Energy Materials and Solar Cells·2023· 12 cited
Sn<sub>1–<i>x</i></sub>Ge<sub><i>x</i></sub>O<sub><i>y</i></sub> and Zn<sub>1–<i>x</i></sub>Ge<sub><i>x</i></sub>O<sub><i>y</i></sub> by Atomic Layer Deposition─Growth Dynamics, Film Properties, and Compositional Tuning for Charge Selective Transport in (Ag,Cu)(In,Ga)Se<sub>2</sub> Solar Cells
ACS Applied Energy Materials·2023· 4 citedOpen Access
Depth-Dependent Atomic-Scale Structural Changes in (Ag,Cu)(In,Ga)Se<sub>2</sub> Absorbers Relevant for Thin-Film Solar Cells
ACS Applied Energy Materials·2023· 6 citedOpen Access
Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se2 Thin Film Solar Cells
2023
Investigating the Role of Ag and Ga Content in the Stability of Wide‐Gap (Ag,Cu)(In,Ga)Se<sub>2</sub>Thin‐Film Solar Cells
physica status solidi (b)·2023· 12 citedOpen Access
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Frequent Co-authors

Marika Edoff(31), Tobias Törndahl(18), Lars Stolt(13), Lars Riekehr(11), Olivier Donzel‐Gargand(10), Charlotte Platzer‐Björkman(9), Jes K. Larsen(8), Jonathan J. S. Scragg(6), Kostiantyn V. Sopiha(6), Bernd Beschoten(5), Fredrik Larsson(5), Tomáš Kubart(5), G. Güntherodt(4), Erik Wallin(4), Wei‐Chao Chen(4), U. Nowak(3), K. D. Usadel(3), P. Miltényi(3), Olle Lundberg(3), Nina Shariati Nilsson(3)