Secondary lateral growth of MAPbI grains for the fabrication of efficient perovskite solar cells

Secondary lateral growth of MAPbI grains for the fabrication of efficient perovskite solar cells

The morphology and optoelectronic properties of perovskite films are the key to high-performance perovskite solar cells (PSCs). Here, a facile non-destructive interface ethanol/chlorobenzene (EtOH/CB) post treatment was established for the lateral grain growth of MAPbI 3 perovskite films and fabrica...

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Veröffentlicht in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2020-03, Vol.8 (9), p.3217-3225
Hauptverfasser: Li, Chengbo, Wang, Aili, Xie, Lisha, Deng, Xiaoyu, Liao, Kejun, Yang, Jin-an, Xiang, Yong, Hao, Feng
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container_issue 9
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container_title Journal of materials chemistry. C, Materials for optical and electronic devices
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creator Li, Chengbo
Wang, Aili
Xie, Lisha
Deng, Xiaoyu
Liao, Kejun
Yang, Jin-an
Xiang, Yong
Hao, Feng
description The morphology and optoelectronic properties of perovskite films are the key to high-performance perovskite solar cells (PSCs). Here, a facile non-destructive interface ethanol/chlorobenzene (EtOH/CB) post treatment was established for the lateral grain growth of MAPbI 3 perovskite films and fabrication of efficient solar cells. The alcoholic treatment leads to perovskite grain coarsening and a secondary growth in the average grain size from 38.88 μm to 89.59 μm. The enlargement of the perovskite crystals induced a notable defect passivation and attenuated charge recombination centers as confirmed by photoluminescence, electrochemical impedance spectroscopy, and photocharge extraction by a linearly-increasing voltage. Accordingly, inverted planar PSC devices showed an 18% enhancement in the overall power conversion efficiency using this alcoholic post-treatment under ambient fabrication conditions. Our results demonstrate a versatile strategy for the lateral growth of perovskite photovoltaics and beyond. Alcohol post treatment was established for the secondary lateral grain growth of MAPbI 3 perovskite films.
doi_str_mv 10.1039/c9tc06293a
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title Secondary lateral growth of MAPbI grains for the fabrication of efficient perovskite solar cells
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