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

• DOI: 10.1002/adma.201604545
• Publication Date: 2016-12-06T13:33:22Z
• Authors: Yuze Lin; Liang Shen; Jun Dai; Yehao Deng; Yang Wu; Yang Bai; Xiaopeng Zheng; Jiayu Wang; Yanjun Fang; Haotong Wei; Wei Ma; Xiao Cheng Zeng; Xiaowei Zhan; Jinsong Huang
• Keywords: 2211 Mechanics of Materials; charge extraction; 2500 Materials Science; 2210 Mechanical Engineering; π-conjugated Lewis base; perovskite solar cells; 01 natural sciences; 7. Clean energy; trap passivation; 0104 chemical sciences

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.