期刊
SOLAR RRL
卷 6, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.202200171
关键词
defects; interfaces; ionic molecules; modification engineering; perovskite solar cells
资金
- Natural Science Fundamental Research Project of Jiangsu Province's Colleges and Universities [20KJA50012]
- Natural Science Foundation of Jiangsu Province [BK20180694]
This review summarizes various ionic materials utilized in perovskite solar cells (PSCs) in recent years and discusses their mechanisms to improve device performance, including defect passivation, energy-level alignment improvement, and crystal structure modulation. Future research trends are also proposed.
Perovskite solar cells (PSCs) have achieved excellent power conversion efficiencies comparable to those of silicon-based cells. However, there are still many deficiencies in device stability, performance reproducibility, and hysteresis effect. Some surface modifiers and additives have been introduced in the last few years. Among them, organic ionic materials have attracted much attention due to their advantages of wide selection, strong electronic interaction, and good solubility. In this review, various ionic materials utilized in PSCs during recent several years are summarized. Their mechanisms to improve the device performance are thoroughly discussed, including the defect passivation on the surfaces and grain boundaries, improvement of energy-level alignment, modification of surface morphology, modulation of crystal structure, stabilization of perovskite phase, suppression of ion migration, protection against moisture, and formation oflow-dimensional perovskite species. Finally, an outlook on the future research trends is proposed.
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