Please find full list on Google Scholar.


Peer-reviewed journals

  • S. Suresh and A. R. Uhl, Present Status of Solution-Processing Routes for Cu(In,Ga)(S,Se)2 Solar Cell Absorbers, Advanced Energy Materials, 2021, 2003743. (link)
  • Y. Liu, S. Akin, L. Pan, R. Uchida, N. Arora, J. V. Milić, A. Hinderhofer, F. Schreiber, A. R. Uhl, S. M. Zakeeruddin, A. Hagfeldt, M. I. Dar, M. Grätzel, Ultrahydrophobic 3D/2D fluoroarene bilayer-based water-resistant perovskite solar cells with efficiencies exceeding 22%, Science Advances, 2019, 5, eaaw2543. (link)
  • A. R. Uhl, A. Rajagopal, J. A. Clark, A. Murray, T. Feurer, S. Buecheler, A. K.-Y. Jen, H. W. Hillhouse, Solution-processed Low-Bandgap CuIn(S,Se)2 Absorbers for High Efficiency Single Junction and Monolithic Chalcopyrite-Perovskite Tandem Solar Cells, Advanced Energy Materials, 2018, 1801254. (link)
  • S. Yun, Y. Qin, A. R. Uhl, V. Nikolaos, M. Yin, D. Li, X. Han, and A. Hagfeldt, Integrated Devices Based on Dye-Sensitized and Perovskite Solar Cells, Energy & Environmental Science, 2018, vol. 11, pp. 476-526. (link)
  • J. A. Clark, A. R. Uhl, T. R. Martin, and H. W. Hillhouse, Evolution of Morphology and Composition during Annealing and Selenization in Solution-Processed Cu2ZnSn(S,Se)4, Chemistry of Materials, 2017, vol. 29 (21), pp. 9328-9339. (link)
  • I. Braly, R. Stoddard, A. Rajagopal, A. R. Uhl, J. Katahara, A. K.-Y. Jen, and H. W. Hillhouse, Current Induced Phase Segregation in Mixed Halide Hybrid Perovskites and its Impact on Two-Terminal Tandem Solar Cell Design, ACS Energy Letters, 2017, vol. 2,  pp. 1841-1847. (link)
  • A. R. Uhl, Z. Yang, A.K.Y. Jen, and H. W. Hillhouse, All solution-processed chalcopyrite – perovskite tandem solar cells in bandgap-matched two-and four-terminal architectures, Journal of Materials Chemistry A, 2017, vol. 5, pp. 3214-3220. (link)
  • A. R. Uhl, J. K. Katahara, and H. W. Hillhouse, Molecular-ink route to 13.0% efficient low-bandgap CuIn(S,Se)2 and 14.7% efficient Cu(In,Ga)(S,Se)2 solar cells, Energy & Environmental Science, 2016, vol. 9, pp. 130-134. (link)
  • H. Xin, S. M. Vorpahl, A. D. Collord, I. L. Braly, A. R. Uhl, B. W. Krueger, D. S. Ginger, and H. W. Hillhouse, Lithium-Doping Affects the Nanoscale Electrical Properties of Grains and Grain Boundaries of Cu2ZnSn(S,Se)4, Physical Chemistry Chemical Physics, 2015, vol. 17, pp. 23859-23866. (link)
  • Y. E. Romanyuk, H. Hagendorfer, P. Stücheli, P. Fuchs, A. R. Uhl, C. M. Sutter-Fella, M. Werner, S. Haass, J. Stückelberger, C. Broussillou, P. Grand, V. Bermudez, and A. N. Tiwari, All Solution-Processed Chalcogenide Solar Cells – From Single Functional Layers Towards a 13.8% Efficient CIGS Device, Advanced Functional Materials, 2015, vol. 25, no. 1, pp. 12-27. (link)
  • C. M. Sutter-Fella, A. R. Uhl, Y. E. Romanyuk, and A. N. Tiwari, Large-grained Cu2ZnSnS4 layers sintered from Sn-rich solution deposited precursors, Physica Status Solidi (A)- Applications and Materials Science, 2015, vol. 212, no. 1, pp. 121-125. (link)
  • A. R. Uhl, P. Fuchs, A. Rieger, F. Pianezzi, C. M. Fella, L. Kranz, D. Keller, H. Hagendorfer, Y. E. Romanyuk, F. LaMattina, S. Yoon, L. Karvonen, T. Magorian- Friedlmeier, E. Ahlswede, D. VanGenechten, F. Stassin, and A. N. Tiwari, Liquid-selenium-enhanced grain growth of nanoparticle precursor layers for CuInSe2 solar cell absorbers, Progress in Photovoltaics: Research and Applications, 2014, vol. 23, no. 9, pp. 1100-1119. (link)
  • C.M. Fella, J. Stückelberger, H. Hagendorfer, F. La Mattina, L. Kranz, S. Nishiwaki, A. R. Uhl, Y. E. Romanyuk, and A. N. Tiwari, Sodium Assisted Sintering of Chalcogenides and Its Application to Solution Processed Cu2ZnSn(S,Se)4 Thin Film Solar Cells, Chemistry of Materials, 2014, vol. 26, no. 3, pp. 1420-1425. (link)
  • A. R. Uhl, M. Koller, A. S. Wallerand, C. M. Fella, L. Kranz, H. Hagendorfer, Y. E. Romanyuk, A. N. Tiwari, S. Yoon, A. Weidenkaff, T. M. Friedlmeier, E. Ahlswede, D. VanGenechten, and F. Stassin, Cu(In,Ga)Se2 absorbers from stacked nanoparticle precursor layers, Thin Solid Films, 2013, vol. 535, pp. 138-142. (link)
  • A. Chirila, P. Reinhard, F. Pianezzi, P. Bloesch, A. R. Uhl, C. Fella, L. Kranz, D. Keller, C. Gretener, H. Hagendorfer, D. Jaeger, R. Erni, S. Nishiwaki, S. Buecheler, and A. N. Tiwari, Potassium-induced surface modification of Cu(In,Ga)Se2 thin films for high-efficiency solar cells, Nature Materials, 2013, vol. 12, pp. 1107-1111. (link)
  • L. Kranz, C. Gretener, J. Perrenoud, R. Schmitt, F. Pianezzi, F. La Mattina, P. Blösch, E. Cheah, A. Chirila, C. M. Fella, H. Hagendorfer, T. Jäger, S. Nishiwaki, A. R. Uhl, S. Buecheler, and A. N. Tiwari, Doping of polycrystalline CdTe for high-efficiency solar cells on flexible metal foil, Nature Communications, 2013, vol. 4, p. 2306. (link)
  • H. Hagendorfer, K. Lienau, S. Nishiwaki, C. M. Fella, L. Kranz, A. R. Uhl, D. Jaeger, L. Luo, C. Gretener, S. Buecheler, Y. E. Romanyuk, and A. N. Tiwari, Highly transparent and conductive ZnO:Al thin films from a low temperature aqueous solution approach, Advanced Materials, 2013, vol. 26, no. 4, pp. 632-636. (link)
  • C. M. Fella, A. R. Uhl, C. Hammond, I. Hermans, Y. E. Romanyuk, and A. N. Tiwari, Formation mechanism of Cu2ZnSnSe4 absorber layers during selenization of solution deposited metal precursors, Journal of Alloys and Compounds, 2013, vol. 567, pp. 102-106. (link)
  • Y. E. Romanyuk, C. M. Fella, A. R. Uhl, M. Werner, A. N. Tiwari, T. Schnabel, and E. Ahlswede, Recent trends in direct solution coating of kesterite absorber layers in solar cells, Solar Energy Materials and Solar Cells, 2013, vol. 119, pp. 181-189. (link)
  • A. R. Uhl, C. Fella, A. Chirila, M. R. Kaelin, L. Karvonen, A. Weidenkaff, C. N. Borca, D. Grolimund, Y. E. Romanyuk, and A. N. Tiwari, Non-vacuum deposition of Cu(In,Ga)Se2 absorber layers from binder free, alcohol solutions, Progress in Photovoltaics: Research and Applications, 2012, vol. 20, no. 5, pp. 526-533. (link)
  • C. M. Fella, A. R. Uhl, Y. E. Romanyuk, and A. N. Tiwari, Cu2ZnSnSe4 absorbers processed from solution deposited metal salt precursors under different selenization conditions, Physica Status Solidi (A)- Applications and Materials Science, 2012, vol. 209, no. 6, pp. 1043-1048. (link)
  • G. M. Ilari, C. M. Fella, C. Ziegler, A. R. Uhl, Y. E. Romanyuk, and A. N. Tiwari, Cu2ZnSnSe4 solar cell absorbers spin-coated from amine-containing ether solutions, Solar Energy Materials and Solar Cells, 2012, vol. 104, pp. 125-130. (link)
  • A. Chirila, S. Buecheler, F. Pianezzi, P. Bloesch, C. Gretener, A. R. Uhl, C. Fella, L. Kranz, J. Perrenoud, S. Seyrling, R. Verma, S. Nishiwaki, Y. E. Romanyuk, G. Bilger, and A. N. Tiwari, Highly efficient Cu(In,Ga)Se2 solar cells grown on flexible polymer films, Nature Materials, 2011, vol. 10, no. 11, pp. 857-861. (link)
  • A. R. Uhl, Y. E. Romanyuk, and A. N. Tiwari, Thin film Cu(In,Ga)Se2 solar cells processed from solution pastes with polymethyl methacrylate binder, Thin Solid Films, 2011, vol. 519, no. 21, pp. 7259-7263. (link)
  • A. Chirila, P. Bloesch, S. Seyrling, A. Uhl, S. Buecheler, F. Pianezzi, C. Fella, J. Perrenoud, L. Kranz, R. Verma, D. Guettler, S. Nishiwaki, Y. E. Romanyuk, G. Bilger, D. Bremaud, and A. N. Tiwari, Cu(In,Ga)Se2 solar cell grown on flexible polymer substrate with efficiency exceeding 17%, Progress in Photovoltaics: Research and Applications, 2011, vol. 19, no. 5, pp. 560-564. (link)


International conference proceedings

  • C. Fella, J. A. Stückelberger, A. Fluri, A. R. Uhl, M. Werner, Y. E. Romanyuk, A. N. Tiwari, Reaction pathways for the formation of Cu2ZnSn(S,Se)4 absorber layers from metal salt precursors annealed under selenium atmosphere, Proceedings of the 28th EU-PVSEC, Paris, France, 2013, pp. 2128 – 2130. (link)
  • L. Kranz, R. Schmitt, J. Perrenoud, C. Gretener, F. Pianezzi, A. R. Uhl, D. Jäger, S. Buecheler, and A. N. Tiwari, Progress towards 14% efficient CdTe solar cells in substrate configuration, 39th IEEE Photovoltaic Specialists Conference (PVSC), Tampa, USA, 2013, no. 6744460, pp. 1644-1648. (link)
  • A. R. Uhl, A. Wallerand, M. Koller, C. Fella, Y. E. Romanyuk, A. N. Tiwari, T. Friedlmeier, E. Ahlswede, D. VanGenechten, and F. Stassin, Selenization of nanoparticle precursor layers for Cu(In,Ga)Se2 absorbers, Proceedings of the 27th EU-PVSEC, Frankfurt, Germany, 2012, pp. 2318-2320. (link)
  • A. Chirila, P. Bloesch, F. Pianezzi, S. Seyrling, A. R. Uhl, S. Buecheler, S. Nishiwaki, A. N. Tiwari, Development of high efficiency flexible CIGS solar cells on different substrates, Technical Digest of the 21st International Photovoltaic Science and Engineering Conference, Fukuoka, Japan, 2012, 4B-3I-02. (link)
  • S. Seyrling, A. Chirila, D. Guettler, P. Bloesch, F. Pianezzi, S. Buecheler, A. R. Uhl, P. Rossbach, U. Mueller and A. N. Tiwari, Na distribution in CIGS solar cells grown with modified three-stage processes, 37th IEEE Photovoltaic Specialists Conference (PVSC), Seattle, USA, 2011, pp. 2519-2522. (link)
  • C. Fella, S. Buecheler, D. Guettler, J. Perrenoud, A. Uhl, and A. N. Tiwari, Ultrasonically sprayed zinc sulfide buffer layers for Cu(In,Ga)(S,Se)2 solar cells, 35th IEEE Photovoltaic Specialists Conference (PVSC), Hawaii, USA, 2010, vol. 5614155, pp. 3394-3397. (link)
  • A. Chirila, P. Blösch, A. Uhl, S. Seyrling, F. Pianezzi, S. Buecheler, C. Fella, S. Nishiwaki, Y. E. Romanyuk, and A. N. Tiwari, Progress towards the development of 18% efficiency flexible CIGS solar cells on polymer film, 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, Valencia, Spain, 2010, pp. 3403-3405. (link)
  • C. Platzer-Björkman and A. Uhl. Comparison of ZnS-based buffer layers by chemical bath deposition and atomic layer deposition. Materials Research Society Proceedings, San Francisco, USA, 2009, vol. 1165, pp. 147-152. (link)


Book chapters

  • A. R. Uhl, Chapter 17: Metal Counter Electrodes for Perovskite Solar Cells, in Counter Electrodes for Dye-Sensitized and Perovskite Solar Cells, Eds. S. Yun and A. Hagfeldt, John Wiley & Sons, Inc., 2018, doi:10.1002/9783527813636.ch17. (link)



  • H. W. Hillhouse and A. R. Uhl, Formulation of Molecular Inks for Copper Chalcogenide Semiconductors, 2016, US62/431,305.
  • A. N. Tiwari, Y. E. Romanyuk, A. R. Uhl, and M. Kälin, Process for producing light absorbing chalcogenide films, 2012, WO2012107256-A1.