Efficiency enhancement in planar CH^sub 3^NH^sub 3^PbI^sub 3-x^Cl^sub x^ perovskite solar cells by processing with bidentate halogenated additives

A simple but effective method for improving the perovskite film quality by adding bidentate halogenated additives into the precursor solution of perovskite was proposed. By comparing and analyzing the effects of the use of different additives on the film-forming performances, DIO was selected as the...

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Bibliographic Details
Published in:Solar energy materials and solar cells 2017-06, Vol.165, p.36
Main Authors: Fu, Guangsheng, Hou, Lixin, Wang, Yali, Liu, Xianhao, Wang, Jia, Li, He, Cui, Yunchao, Liu, Dachao, Li, Xiaowei, Yang, Shaopeng
Format: Article
Language:English
Subjects:
Additives
Chelation
Crystal defects
Crystals
Forming
Grain size
Halogenation
Perovskite
Photovoltaic cells
Solar cells
Thin films
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Summary:A simple but effective method for improving the perovskite film quality by adding bidentate halogenated additives into the precursor solution of perovskite was proposed. By comparing and analyzing the effects of the use of different additives on the film-forming performances, DIO was selected as the optimal additive. The optimal additive amount of DIO could contribute to a more uniform and non-defective growth of perovskite crystal nucleation, enabling preparation of the smooth and compact film with large grain size. The effect mechanism of the chelation between DIO and Pb 2+ on the film-forming process of perovskite crystal was also analyzed. The PCE of the PSC device incorporating the DIO is runned up to 19.1%, accounting for a 73.6% enhancement as compared to pre-optimized control PSCs. Conclusively, using the proposed technology, the conversion efficiency of the prepared 5 cm...5 cm device reaches up to 11.2%, which can be applicable to the preparation of large-area perovskite solar cells.
ISSN:0927-0248