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1 April 2022 Imaging the exceptional electrical performance of Rb-based halide perovskites at the nanoscale
Richa Lahoti, John M. Howard, Md Arafat Mahmud, Thomas White, Marina S. Leite
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Proceedings Volume PC11996, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XI; PC1199606 (2022) https://doi.org/10.1117/12.2607804
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
We employ Kelvin-probe force microscopy (KPFM) and photoconductive-atomic force microscopy (pc-AFM) to comprehensively evaluate the nanoscale transformations in optoelectrical properties in multi-cation metal halide perovskites. We quantify the changes in photocurrent and photovoltage for both dual-cation and quad-cation perovskite. The superior electrical performance observed in quad-cation perovskite, lent by Rb+ cation, will be discussed in detail. An in-depth analysis of photoactivity within grains and grain boundaries will be shared. Further, a mechanism for charge carrier transport is proposed through two types of GBs- with defects, and with defect passivation in dual and quad-cation perovskite, respectively.
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Richa Lahoti, John M. Howard, Md Arafat Mahmud, Thomas White, and Marina S. Leite "Imaging the exceptional electrical performance of Rb-based halide perovskites at the nanoscale", Proc. SPIE PC11996, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XI, PC1199606 (1 April 2022); https://doi.org/10.1117/12.2607804
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KEYWORDS
Perovskite
Optoelectronics
Metals
Optoelectronic devices
Solar cells
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