High performance inverted structure perovskite solar cells based on a PCBM: Polystyrene blend electron transport layer
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AbstractHybrid organic/inorganic perovskite solar cells are among the most competitive emerging photovoltaic technologies. Here, we report on NiO-based inverted structure perovskite solar cells with a high power conversion efficiency of 10.68%, which is achieved by adding a small percentage (1.5 wt%) of high molecular weight polystyrene (PS) into the PCBM electron transport layer (ETL). The addition of PS facilitates the formation of a highly smooth and uniform PCBM ETL that is more effective in preventing undesirable electron-hole recombination between the perovskite layer and the top electrode. As a result, the VOC of the PCBM:PS-based cells is increased from 0.97 V to 1.07 V, which leads to significantly enhanced power conversion efficiencies of the solar cells. Our study provides a simple and low-cost approach to improving the ETL film quality and the performance of inverted perovskite solar cells.
All Author(s) ListBai Y., Yu H., Zhu Z., Jiang K., Zhang T., Zhao N., Yang S., Yan H.
Journal nameJournal of Materials Chemistry A
Volume Number3
Issue Number17
PublisherRoyal Society of Chemistry
Place of PublicationUnited Kingdom
Pages9098 - 9102
LanguagesEnglish-United Kingdom

Last updated on 2020-29-11 at 02:37