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

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

doi:10.1002/adma.201604545

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

Adv Mater. 2017 Feb;29(7). doi: 10.1002/adma.201604545. Epub 2016 Dec 6.

Authors

Yuze Lin¹, Liang Shen¹, Jun Dai², Yehao Deng¹, Yang Wu³, Yang Bai¹, Xiaopeng Zheng¹, Jiayu Wang⁴, Yanjun Fang¹, Haotong Wei¹, Wei Ma³, Xiao Cheng Zeng², Xiaowei Zhan⁴, Jinsong Huang¹

Affiliations

¹ Department of Mechanical and Materials Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
² Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
³ State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China.
⁴ Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing, 100871, China.

PMID: 27922737
DOI: 10.1002/adma.201604545

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.

Keywords: charge extraction; perovskite solar cells; trap passivation; π-conjugated Lewis base.