Fully-ambient-air and antisolvent-free-processed stable perovskite solar cells with perovskite-based composites and interface engineering
Nano Energy(2019)
摘要
For commercialization of perovskite solar cells (PSCs), the device stability issues attributed to degradation of perovskite material, photo and thermal instability, and photocurrent density-voltage (J-V) hysteresis behavior should be solved. Furthermore, most of presented high efficiency PSCs utilize an antisolvent-strategy to assist perovskite crystal growth with large grain-size and excellent coverage. To solve such issues, we developed fully-ambient-air and antisolvent-free processes for the fabrication of PSCs with perovskite-based composites (i.e., MAPbI3-xClx-Cu:NiO, MAPbI3-xClx-Cu:NiO-carbon-graphite and MAPbI3-xClx-Al2O3). Such perovskite composites based cells with interface engineering yielded high power-conversion-efficiency (PCE) of 18.6% and fill factor (FF) of 78.3% with excellent reproducibility. More importantly, the target cells showed hysteresis-free behavior and dramatic enhancement in air-, photo- and thermal-stability. Compared to the pristine cells, the target device showed remarkable long-term stability with retaining almost 100% of the initial values of Voc and Jsc, and ~94% of FF and PCE over 280 days.
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关键词
Perovskite solar cells,MAPbI3-xClx-Cu:NiO-Carbon-graphite composites,Ambient-air- and antisolvent-free-processed,Hysteresis-free,Stability
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