Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture
KAUST DepartmentMaterial Science and Engineering Program
Material Science and Engineering
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/664655
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AbstractAll-inorganic CsPbI3 perovskite quantum dots (QDs) have received intense research interest for photovoltaic applications because of the recently demonstrated higher power conversion efficiency compared to solar cells using other QD materials. These QD devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. In this work, through developing a hybrid interfacial architecture consisting of CsPbI3 QD/PCBM heterojunctions, we report the formation of an energy cascade for efficient charge transfer at both QD heterointerfaces and QD/electron transport layer interfaces. The champion CsPbI3 QD solar cell has a best power conversion efficiency of 15.1%, which is among the highest report to date. Building on this strategy, we demonstrate the very first perovskite QD flexible solar cell with a record efficiency of 12.3%. A detailed morphological characterization reveals that the perovskite QD film can better retain structure integrity than perovskite bulk thin-film under external mechanical stress. This work is the first to demonstrate higher mechanical endurance of QD film compared to bulk thin-film, and highlights the importance of further research on high-performance and flexible optoelectronic devices using solution-processed QDs.
CitationHu, L., Zhao, Q., Huang, S., Zheng, J., Guan, X., Patterson, R., … Wu, T. (2020). Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture. doi:10.21203/rs.3.rs-47321/v1
SponsorsL. Hu and T. Wu acknowledge the support of the Australian Research Council (DP190103316). This research used the facilities supported by Microscopy Australia at the Electron Microscope Unit at UNSW. J. Yuan thank the support from the National Natural Science Foundation of China (Grant No. 51803144) the Natural Science Foundation of Jiangsu Province of China (BK20170337)“111” project, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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