π-Conjugated Lewis Base: Efficient Trap-Passivation and Charge-Extraction for Hybrid Perovskite Solar Cells.

Lin, Yuze; Shen, Liang; Dai, Jun; Deng, Yehao; Wu, Yang; Bai, Yang; Zheng, Xiaopeng; Wang, Jiayu et al. · Adv Mater · 2017

basic_science · Level V

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Abstract

A π-conjugated Lewis base is introduced into perovskite solar cells, namely, indacenodithiophene end-capped with 1.1-dicyanomethylene-3-indanone (IDIC), as a multifunctional interlayer, which combines efficient trap-passivation and electron-extraction. Perovskite solar cells with IDIC layers yield higher photovoltages and photocurrents, and 45% enhanced efficiency compared with control devices without IDIC.