Prof. Udo Bach | ARC Centre of Excellence in Exciton Science

Prof. Udo Bach

Chief Investigator

Advanced Photovoltaics Laboratory

Bach is a solar energy expert who has worked with numerous solar industry partners including: Hoechst, NTera, Bluescope Steel, Bosch, Innovia, Suntech, Trina Solar.

Centre Research Themes: 
1. Excitonic Systems for Solar Energy Conversion
2. Control of Excitons

Publications

Conference Papers
Bach, U.; Mao, W.; Lin, X.; Deng, S. Single-Crystalline and Back-Contact Perovskite Optoelectronics. In 4th Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and OptoelectronicsProceedings of the 4th Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics; 4th Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and OptoelectronicsProceedings of the 4th Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics; Fundació Scito: Tsukuba-shi, Japan, 2019. doi: 10.29363/nanoge.iperop.2020.000,10.29363/nanoge.iperop.2020.040
Journal Articles
Angmo, D.; DeLuca, G.; Scully, A. D.; Chesman, A. S. R.; Seeber, A.; Zuo, C.; Vak, D.; Bach, U.; Gao, M. A Lab-to-Fab Study toward Roll-to-Roll Fabrication of Reproducible Perovskite Solar Cells under Ambient Room Conditions. Cell Reports Physical Science 2021, 2 (1), 100293 DOI: 10.1016/j.xcrp.2020.100293. doi: 10.1016/j.xcrp.2020.100293
Li, W.; Zhu, B.; Rothmann, M. Uller; Liu, A.; Chen, W.; Choo, Y. Yee; Pai, N.; Mao, W.; Zhang, T.; Bao, Q.; et al. Intermediate phase-enhanced Ostwald ripening for the elimination of phase segregation in efficient inorganic CsPbIBr2 perovskite solar cells中间相促进CsPbIBr2晶体生长以消除高效无机钙钛矿太阳能电池的卤素相分离. Science China Materials 2021 DOI: 10.1007/s40843-021-1660-6. doi: 10.1007/s40843-021-1660-6
Tan, B.; Raga, S. R.; Rietwyk, K. James; Lu, J.; Fürer, S. O.; Griffith, J. C.; Cheng, Y. - B.; Bach, U. The impact of spiro-OMeTAD photodoping on the reversible light-induced transients of perovskite solar cells. Nano Energy 2021, 82, 105658 DOI: 10.1016/j.nanoen.2020.105658. doi: 10.1016/j.nanoen.2020.105658
Lin, X.; Lu, J.; Raga, S. R.; McMeekin, D. P.; Ou, Q.; Scully, A. D.; Tan, B.; Chesman, A. S. R.; Deng, S.; Zhao, B.; et al. Balancing Charge Extraction for Efficient Back‐Contact Perovskite Solar Cells by Using an Embedded Mesoscopic Architecture. Advanced Energy Materials 2021, 11 (21), 2100053 DOI: 10.1002/aenm.v11.21,10.1002/aenm.202100053. doi: 10.1002/aenm.v11.21,10.1002/aenm.202100053
Kurdi, K. Al; McCarthy, D. P.; McMeekin, D. P.; Fürer, S. O.; Tremblay, M. - H.; Barlow, S.; Bach, U.; Marder, S. R. A naphthalene diimide side-chain polymer as an electron-extraction layer for stable perovskite solar cells. Materials Chemistry Frontiers 2021, 5 (1), 450-457 DOI: 10.1039/D0QM00685H. doi: 10.1039/D0QM00685H
Li, W.; Rothmann, M. Uller; Zhu, Y.; Chen, W.; Yang, C.; Yuan, Y.; Choo, Y. Yee; Wen, X.; Cheng, Y. - B.; Bach, U.; et al. The critical role of composition-dependent intragrain planar defects in the performance of MA1–xFAxPbI3 perovskite solar cells. Nature Energy 2021, 6 (6), 624 - 632 DOI: 10.1038/s41560-021-00830-9. doi: 10.1038/s41560-021-00830-9
Rietwyk, K. James; Tan, B.; Surmiak, A.; Lu, J.; McMeekin, D. P.; Raga, S. R.; Duffy, N.; Bach, U. Light intensity modulated photoluminescence for rapid series resistance mapping of perovskite solar cells. Nano Energy 2020, 73, 104755 DOI: 10.1016/j.nanoen.2020.104755. doi: 10.1016/j.nanoen.2020.104755
Fürer, S. O.; Milhuisen, R. A.; Kashif, M. K.; Raga, S. R.; Acharya, S. S.; Forsyth, C.; Liu, M.; Frazer, L.; Duffy, N. W.; C. Ohlin, A.; et al. The Performance‐Determining Role of Lewis Bases in Dye‐Sensitized Solar Cells Employing Copper‐Bisphenanthroline Redox Mediators. Advanced Energy Materials 2020, 10 (37), 2002067 DOI: 10.1002/aenm.v10.37,10.1002/aenm.202002067. doi: 10.1002/aenm.v10.37,10.1002/aenm.202002067
Chen, K.; Jin, W.; Zhang, Y.; Yang, T.; Reiss, P.; Zhong, Q.; Bach, U.; Li, Q.; Wang, Y.; Zhang, H.; et al. High Efficiency Mesoscopic Solar Cells Using CsPbI3 Perovskite Quantum Dots Enabled by Chemical Interface Engineering. Journal of the American Chemical Society 2020, 142 (8), 3775 - 3783 DOI: 10.1021/jacs.9b10700,10.1021/jacs.9b10700.s001. doi: 10.1021/jacs.9b10700,10.1021/jacs.9b10700.s001
Mao, W.; Hall, C. R.; Bernardi, S.; Cheng, Y. - B.; Widmer-Cooper, A.; Smith, T. A.; Bach, U. Light-induced reversal of ion segregation in mixed-halide perovskites. Nature Materials 2020 DOI: 10.1038/s41563-020-00826-y. doi: 10.1038/s41563-020-00826-y
Jumabekov, A. N.; Chesman, A. S. R.; Bach, U. Chemical passivation of the perovskite layer and its real-time effect on the device performance in back-contact perovskite solar cells. Journal of Vacuum Science & Technology A 2020, 38 (6), 060401 DOI: 10.1116/6.0000481. doi: 10.1116/6.0000481
Hu, M.; Wu, X.; Tan, W. Liang; Tan, B.; Scully, A. D.; Ding, L.; Zhou, C.; Xiong, Y.; Huang, F.; Simonov, A. N.; et al. Solvent Engineering of a Dopant-Free Spiro-OMeTAD Hole-Transport Layer for Centimeter-Scale Perovskite Solar Cells with High Efficiency and Thermal Stability. ACS Applied Materials & Interfaces 2020, 12 (7), 8260 - 8270 DOI: 10.1021/acsami.9b21177. doi: 10.1021/acsami.9b21177
Sabatini, R. P.; Liao, C.; Bernardi, S.; Mao, W.; Rahme, M. S.; Widmer-Cooper, A.; Bach, U.; Huang, S.; Ho‐Baillie, A. W. Y.; Lakhwani, G. Solution‐Processed Faraday Rotators Using Single Crystal Lead Halide Perovskites. Advanced Science 2020, 7 (7), 1902950 DOI: doi.org/10.1002/advs.201902950. doi: doi.org/10.1002/advs.201902950
Bacal, D. M.; Lal, N. N.; Jumabekov, A. N.; Hou, Q.; Hu, Y.; Lu, J.; Chesman, A. S. R.; Bach, U. Solution-processed antireflective coating for back-contact perovskite solar cells. Optics Express 2020, 28 (9), 12650-12660 DOI: 10.1364/OE.384039. doi: 10.1364/OE.384039
Pai, N.; Lu, J.; Wang, M.; Chesman, A. S. R.; Seeber, A.; Cherepanov, P. V.; Senevirathna, D. C.; Gengenbach, T. R.; Medhekar, N. V.; Andrews, P. C.; et al. Enhancement of the intrinsic light harvesting capacity of Cs2AgBiBr6 double perovskite via modification with sulphide. Journal of Materials Chemistry A 2020, 8 (4), 2008 - 2020 DOI: 10.1039/C9TA10422D. doi: 10.1039/C9TA10422D
Surmiak, A.; Zhang, T.; Lu, J.; Rietwyk, K. James; Raga, S. Ruiz; McMeekin, D. P.; Bach, U. High‐Throughput Characterization of Perovskite Solar Cells for Rapid Combinatorial Screening. Solar RRL 2020, 4 (7), 2000097 DOI: 10.1002/solr.v4.7,10.1002/solr.202000097. doi: 10.1002/solr.v4.7,10.1002/solr.202000097
Luan, P.; Meng, Q.; Wu, J.; Li, Q.; Zhang, X.; Zhang, Y.; O'Dell, L. A.; Raga, S. R.; Pringle, J.; Griffith, J. C.; et al. Unique Layer‐Doping‐Induced Regulation of Charge Behavior in Metal‐Free Carbon Nitride Photoanodes for Enhanced Performance. ChemSusChem 2020, 13 (2), 328-333 DOI: 10.1002/cssc.201902967. doi: 10.1002/cssc.201902967
Liu, C.; Sun, J.; Tan, W. Liang; Lu, J.; Gengenbach, T. R.; McNeill, C. R.; Ge, Z.; Cheng, Y. - B.; Bach, U. Alkali Cation Doping for Improving the Structural Stability of 2D Perovskite in 3D/2D PSCsAlkali Cation Doping for Improving the Structural Stability of 2D Perovskite in 3D/2D PSCs. Nano Letters 2020, 20 (2), 1240 - 1251 DOI: 10.1021/acs.nanolett.9b04661,10.1021/acs.nanolett.9b04661.s001. doi: 10.1021/acs.nanolett.9b04661,10.1021/acs.nanolett.9b04661.s001
Bu, T.; Li, J.; Lin, Q.; McMeekin, D. P.; Sun, J.; Wang, M.; Chen, W.; Wen, X.; Mao, W.; McNeill, C. R.; et al. Structure engineering of hierarchical layered perovskite interface for efficient and stable wide bandgap photovoltaics. Nano Energy 2020, 75, 104917 DOI: 10.1016/j.nanoen.2020.104917. doi: 10.1016/j.nanoen.2020.104917
Meftahi, N.; Klymenko, M. V.; Christofferson, A. J.; Bach, U.; Winkler, D. A.; Russo, S. Machine learning property prediction for organic photovoltaic devices. npj Computational Materials 2020, 6 (1) DOI: 10.1038/s41524-020-00429-w. doi: 10.1038/s41524-020-00429-w
Lin, X.; Raga, S. R.; Chesman, A. S. R.; Ou, Q.; Jiang, L.; Bao, Q.; Lu, J.; Cheng, Y. - B.; Bach, U. Honeycomb-shaped charge collecting electrodes for dipole-assisted back-contact perovskite solar cells. Nano Energy 2020, 67, 104223 DOI: 10.1016/j.nanoen.2019.104223. doi: 10.1016/j.nanoen.2019.104223
Hu, Y.; Adhyaksa, G. W. P.; DeLuca, G.; Simonov, A. N.; Duffy, N. W.; Reichmanis, E.; Bach, U.; Docampo, P.; Bein, T.; Garnett, E. C.; et al. Perovskite solar cells with a hybrid electrode structure. AIP Advances 2019, 9 (12), 125037 DOI: 10.1063/1.5127275. doi: 10.1063/1.5127275
Pai, N.; Lu, J.; Gengenbach, T. R.; Seeber, A.; Chesman, A. S. R.; Jiang, L.; Senevirathna, D. C.; Andrews, P. C.; Bach, U.; Cheng, Y. - B.; et al. Silver Bismuth Sulfoiodide Solar Cells: Tuning Optoelectronic Properties by Sulfide Modification for Enhanced Photovoltaic Performance. Advanced Energy Materials 2019, 9 (5), 1803396 DOI: 10.1002/aenm.201803396. doi: 10.1002/aenm.201803396
Chen, W.; Mao, W.; Bach, U.; Jia, B.; Wen, X. Tracking Dynamic Phase Segregation in Mixed‐Halide Perovskite Single Crystals under Two‐Photon Scanning Laser Illumination. Small Methods 2019, 3 (11), 1900273 DOI: 10.1002/smtd.201900273. doi: 10.1002/smtd.201900273
Mao, W.; Hall, C. R.; Chesman, A. S. R.; Forsyth, C.; Cheng, Y. - B.; Duffy, N. W.; Smith, T. A.; Bach, U. Visualizing Phase Segregation in Mixed-Halide Perovskite Single Crystals. Angewandte Chemie International Edition 2019, 58 (9), 2893 - 2898 DOI: 10.1002/anie.201810193 . doi: 10.1002/anie.201810193
Lu, J.; Scully, A. D.; Sun, J.; Tan, B.; Chesman, A. S. R.; Raga, S. Ruiz; Jiang, L.; Lin, X.; Pai, N.; Huang, W.; et al. Multiple Roles of Cobalt Pyrazol-Pyridine Complexes in High-Performing Perovskite Solar Cells. The Journal of Physical Chemistry Letters 2019, 10 (16), 4675 - 4682 DOI: 10.1021/acs.jpclett.9b01783. doi: 10.1021/acs.jpclett.9b01783
Lloyd, J. A.; Liu, Y.; Ng, S. Hock; Thai, T.; Gómez, D. E.; Widmer-Cooper, A.; Bach, U. Self-assembly of spherical and rod-shaped nanoparticles with full positional control. Nanoscale 2019, 11 (47), 22841-22848 DOI: 10.1039/C9NR06679A. doi: 10.1039/C9NR06679A
Jiang, L.; Lu, J.; Raga, S. R.; Sun, J.; Lin, X.; Huang, W.; Huang, F.; Bach, U.; Cheng, Y. - B. Fatigue stability of CH3NH3PbI3 based perovskite solar cells in day/night cycling. Nano Energy 2019, 58, 687 - 694 DOI: 10.1016/j.nanoen.2019.02.005. doi: 10.1016/j.nanoen.2019.02.005
Tan, B.; Raga, S. R.; Chesman, A. S. R.; Fürer, S. O.; Zheng, F.; McMeekin, D. P.; Jiang, L.; Mao, W.; Lin, X.; Wen, X.; et al. P‐Dopant: LiTFSI‐Free Spiro‐OMeTAD‐Based Perovskite Solar Cells with Power Conversion Efficiencies Exceeding 19%(Cover: Adv. Energy Mater. 32/2019). Advanced Energy Materials 2019, 9 (32) DOI: https://doi.org/10.1002/aenm.201970123. doi: https://doi.org/10.1002/aenm.201970123
Ng, C.; Zeng, P.; Lloyd, J. A.; Chakraborty, D.; Roberts, A.; Smith, T. A.; Bach, U.; Sader, J. E.; Davis, T. J.; Gómez, D. E. Large-Area Nanofabrication of Partially Embedded Nanostructures for Enhanced Plasmonic Hot-Carrier Extraction. ACS Applied Nano Materials 2019, 2 (3), 1164 - 1169 DOI: 10.1021/acsanm.8b01988. doi: 10.1021/acsanm.8b01988
Tan, B.; Raga, S. R.; Chesman, A. S. R.; Fürer, S. O.; Zheng, F.; McMeekin, D. P.; Jiang, L.; Mao, W.; Lin, X.; Wen, X.; et al. LiTFSI‐Free Spiro‐OMeTAD‐Based Perovskite Solar Cells with Power Conversion Efficiencies Exceeding 19%. Advanced Energy Materials 2019, 9 (32), 1901519 DOI: 10.1002/aenm.201901519. doi: 10.1002/aenm.201901519
Sun, J.; Pascoe, A. R.; Meyer, S.; Wu, Q.; Gaspera, E. Della; Raga, S. R.; Zhang, T.; Nattestad, A.; Bach, U.; Cheng, Y. - B.; et al. Ultrasonic spray deposition of TiO2 electron transport layers for reproducible and high efficiency hybrid perovskite solar cells. Solar Energy 2019, 188, 697 - 705 DOI: 10.1016/j.solener.2019.06.045. doi: 10.1016/j.solener.2019.06.045
Hou, Q.; Bacal, D. M.; Jumabekov, A. N.; Li, W.; Wang, Z.; Lin, X.; Ng, S. Hock; Tan, B.; Bao, Q.; Chesman, A. S. R.; et al. Back-contact perovskite solar cells with honeycomb-like charge collecting electrodes. Nano Energy 2018, 50, 710 - 716 DOI: 10.1016/j.nanoen.2018.06.006. doi: 10.1016/j.nanoen.2018.06.006
Pai, N.; Lu, J.; Gengenbach, T. R.; Seeber, A.; Chesman, A. S. R.; Jiang, L.; Senevirathna, D. C.; Andrews, P. C.; Bach, U.; Cheng, Y. ‐B.; et al. Silver Bismuth Sulfoiodide Solar Cells: Tuning Optoelectronic Properties by Sulfide Modification for Enhanced Photovoltaic Performance. Advanced Energy Materials 2018, 1803396 DOI: 10.1002/aenm.201803396. doi: 10.1002/aenm.201803396
Zhang, J.; Zhang, T.; Jiang, L.; Bach, U.; Cheng, Y. - B. 4-tert-Butylpyridine Free Hole Transport Materials for Efficient Perovskite Solar Cells: A New Strategy to Enhance the Environmental and Thermal Stability. ACS Energy Letters 2018, 3 (7), 1677 - 1682 DOI: 10.1021/acsenergylett.8b00786. doi: 10.1021/acsenergylett.8b00786
Jumabekov, A. N.; Lloyd, J. A.; Bacal, D. M.; Bach, U.; Chesman, A. S. R. Fabrication of Back-Contact Electrodes Using Modified Natural Lithography. ACS Applied Energy Materials 2018, 1 (3), 1077 - 1082 DOI: 10.1021/acsaem.7b00213. doi: 10.1021/acsaem.7b00213
Pai, N.; Lu, J.; Senevirathna, D. C.; Chesman, A. S. R.; Gengenbach, T.; Chatti, M.; Bach, U.; Andrews, P. C.; Spiccia, L.; Cheng, Y.; et al. Spray deposition of AgBiS 2 and Cu 3 BiS 3 thin films for photovoltaic applications. Journal of Materials Chemistry C 2018, 6 (10), 2483 - 2494 DOI: 10.1039/C7TC05711C. doi: 10.1039/C7TC05711C
Zhang, J.; Daniel, Q.; Zhang, T.; Wen, X.; Xu, B.; Sun, L.; Bach, U.; Cheng, Y. Chemical Dopant Engineering in Hole Transport Layers for Efficient Perovskite Solar Cells: Insight into the Interfacial Recombination. ACS Nano 2018, 12 (10), 10452 - 10462 DOI: 10.1021/acsnano.8b06062. doi: 10.1021/acsnano.8b06062
Rothmann, M. Uller; Li, W.; Zhu, Y.; Liu, A.; Ku, Z.; Bach, U.; Etheridge, J.; Cheng, Y. Structural and Chemical Changes to CH 3 NH 3 PbI 3 Induced by Electron and Gallium Ion Beams. Advanced Materials 2018, 30 (25), 1800629 DOI: 10.1002/adma.201800629. doi: 10.1002/adma.201800629
DeLuca, G.; Jumabekov, A. N.; Hu, Y.; Simonov, A. N.; Lu, J.; Tan, B.; Adhyaksa, G. W. P.; Garnett, E. C.; Reichmanis, E.; Chesman, A. S. R.; et al. Transparent Quasi-Interdigitated Electrodes for Semitransparent Perovskite Back-Contact Solar Cells. ACS Applied Energy Materials 2018, 1 (9), 4473 - 4478 DOI: 10.1021/acsaem.8b01140. doi: 10.1021/acsaem.8b01140
Lu, J.; Liu, Z.; Pai, N.; Jiang, L.; Bach, U.; Simonov, A. N.; Cheng, Y.; Spiccia, L. Molecular Engineering of Zinc-Porphyrin Sensitisers for p-Type Dye-Sensitised Solar Cells. ChemPlusChem 2018, 83 (7), 711 - 720 DOI: 10.1002/cplu.201800104. doi: 10.1002/cplu.201800104
Lin, X.; Chesman, A. S. R.; Raga, S. R.; Scully, A. D.; Jiang, L.; Tan, B.; Lu, J.; Cheng, Y.; Bach, U. Effect of Grain Cluster Size on Back-Contact Perovskite Solar Cells. Advanced Functional Materials 2018, 28 (45), 1805098 DOI: 10.1002/adfm.201805098. doi: 10.1002/adfm.201805098
Lu, J.; Lin, X.; Jiao, X.; Gengenbach, T.; Scully, A. D.; Jiang, L.; Tan, B.; Sun, J.; Li, B.; Pai, N.; et al. Interfacial benzenethiol modification facilitates charge transfer and improves stability of cm-sized metal halide perovskite solar cells with up to 20% efficiency. Energy & Environmental Science 2018, 11 (7), 1880 - 1889 DOI: 10.1039/C8EE00754C. doi: 10.1039/C8EE00754C
Mao, W.; Zheng, J.; Zhang, Y.; Chesman, A. S. R.; Ou, Q.; Hicks, J.; Li, F.; Wang, Z.; Graystone, B.; Bell, T. D. M.; et al. Controlled Growth of Monocrystalline Organo-Lead Halide Perovskite and Its Application in Photonic Devices. Angewandte Chemie International Edition 2017, 56 (41), 12486 - 12491 DOI: 10.1002/anie.201703786. doi: 10.1002/anie.201703786
Lu, J.; Jiang, L.; Li, W.; Li, F.; Pai, N.; Scully, A. D.; Tsai, C. - M.; Bach, U.; Simonov, A. N.; Cheng, Y. - B.; et al. Diammonium and Monoammonium Mixed-Organic-Cation Perovskites for High Performance Solar Cells with Improved Stability. Advanced Energy Materials 2017, 7 (18), 1700444 DOI: 10.1002/aenm.201700444. doi: 10.1002/aenm.201700444
Lin, X.; Jumabekov, A. N.; Lal, N. N.; Pascoe, A. R.; Gómez, D. E.; Duffy, N. W.; Chesman, A. S. R.; Sears, K.; Fournier, M.; Zhang, Y.; et al. Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cells. Nature Communications 2017, 8 (1), 613 DOI: 10.1038/s41467-017-00588-3. doi: 10.1038/s41467-017-00588-3
Li, W.; Rothmann, M. Uller; Liu, A.; Wang, Z.; Zhang, Y.; Pascoe, A. R.; Lu, J.; Jiang, L.; Chen, Y.; Huang, F.; et al. Phase Segregation Enhanced Ion Movement in Efficient Inorganic CsPbIBr 2 Solar Cells. Advanced Energy Materials 2017, 7 (20), 1700946 DOI: 10.1002/aenm.201700946. doi: 10.1002/aenm.201700946
Lal, N. N.; Dkhissi, Y.; Li, W.; Hou, Q.; Cheng, Y. - B.; Bach, U. Perovskite Tandem Solar Cells. Advanced Energy Materials 2017, 7 (18), 1602761 DOI: 10.1002/aenm.201602761. doi: 10.1002/aenm.201602761
Pascoe, A. R.; Gu, Q.; Rothmann, M. U.; Li, W.; Zhang, Y.; Scully, A. D.; Lin, X.; Spiccia, L.; Bach, U.; Cheng, Y. - B. Directing nucleation and growth kinetics in solution-processed hybrid perovskite thin-films. Science China Materials 2017, 60 (7), 617 - 628 DOI: 10.1007/s40843-017-9043-y. doi: 10.1007/s40843-017-9043-y
Kashif, M. K.; Benesperi, I.; Milhuisen, R. A.; Meyer, S.; Hellerstedt, J.; Zee, D.; Duffy, N. W.; Halstead, B.; Fuhrer, M. S.; Cashion, J.; et al. Polypyridyl Iron Complex as a Hole-Transporting Material for Formamidinium Lead Bromide Perovskite Solar Cells. ACS Energy Letters 2017, 2 (8), 1855 - 1859 DOI: 10.1021/acsenergylett.7b00522. doi: 10.1021/acsenergylett.7b00522