Interfacial engineering to improve the stability of perovskite solar cells
Dongmei Li a, Qingbo Meng a
a Institute of Physics, Chinese Academy of Sciences, Zhongguancun South Third Street 8, Haidian District, Beijing, 100190, China
nanoGe Perovskite Conferences
Proceedings of nanoGe International Conference on Perovskite Solar Cells, Photonics and Optoelectronics (NIPHO19)
International Conference on Perovskite Photonics and Optoelectronics
Jerusalem, Israel, 2019 February 24th - 27th
Organizers: Lioz Etgar and Paul Meredith
Poster, Dongmei Li, 053
Publication date: 21st November 2018

Perovskite solar cells (PSCs) have developed rapidly, and a certified 23.7% efficiency has been achieved so far. Currently, stability issues of PSCs have been recognized to be the key to its future development, which are widely researched from materials, interfaces to the whole device both in experimental and theoretical respects. Interfacial engineering is a kind of effective methodology to improve the stability of PSCs. In this contribution, interface modification to perovskite solar cells as well as its influences on the cell performance will be focused [1-11]. For example, a novel large π-conjugated carbon material, graphdiyne (GDY), has been introduced into FAMAPbIBr perovskite film to construct a perovskite/DGY bulk heterojunction for planar PSCs. This perovskite/GDY heterojunction provides an extra channel to favor exciton separation and facilitate the photogenerated electron extraction ability, in the meantime, the introduction of GDY can passivate grain boundaries and interfaces to suppress recombination. Up to 20.54% power conversion efficiency is achieved, and the anti-humidity ability of the perovskite films and devices is also improved.

We would like to thank the financial support from NSFC.

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