期刊
IEEE ELECTRON DEVICE LETTERS
卷 40, 期 11, 页码 1784-1787出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2019.2944474
关键词
Doping; Performance evaluation; Photovoltaic cells; Charge carrier processes; Degradation; Numerical simulation; Numerical stability; Semiconductor device modeling; photovoltaic cells
资金
- Visvesvaraya Young Faculty Fellowship
Efficient and balanced collection of photo-generated charge carriers is a fundamental requirement for high efficiency solar cells - including perovskites. Any process or bias induced asymmetry in carrier collection leads to degradation in efficiency. Here, for the first time, we show that process induced self-doping in the perovskite active layer could result in asymmetric carrier collection. Accordingly, interface quality at the majority carrier collection layer becomes the performance limiting factor in perovskite solar cells. Through detailed numerical simulations we identify optimization schemes to overcome the ill-effects due to self-doping and interface recombination. Further, the insights on asymmetric carrier collection has interesting implications on regular vs. inverted geometry and long term stability of perovskite solar cells - which could be of broad interest to the community.
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