A PCBM Electron Transport Layer Containing Small Amounts of Dual Polymer Additives that Enables Enhanced Perovskite Solar Cell Performance

Zonglong Zhu; Qifan Xue; Hexiang He; Kui Jiang; Zhicheng Hu; Yang Bai; Teng Zhang; Shuang Xiao; Kenan Gundogdu; Bhoj Raj Gautam; Harald Ade; Fei Huang; Kam Sing Wong; Hin-Lap Yip; Shihe Yang; He Yan

doi:10.1002/advs.201500353

A PCBM Electron Transport Layer Containing Small Amounts of Dual Polymer Additives that Enables Enhanced Perovskite Solar Cell Performance

Adv Sci (Weinh). 2015 Dec 10;3(9):1500353. doi: 10.1002/advs.201500353. eCollection 2016 Sep.

Authors

Zonglong Zhu¹, Qifan Xue², Hexiang He³, Kui Jiang¹, Zhicheng Hu², Yang Bai¹, Teng Zhang¹, Shuang Xiao¹, Kenan Gundogdu⁴, Bhoj Raj Gautam⁴, Harald Ade⁴, Fei Huang², Kam Sing Wong³, Hin-Lap Yip², Shihe Yang¹, He Yan¹

Affiliations

¹ Department of Chemistry and Energy Institute The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong.
² Institute of Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. China 510641.
³ Department of Physics The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong.
⁴ Department of Physics North Carolina State University Raleigh NC USA 27695.

Abstract

A polymer/PCBM hybrid electron transport layer is reported that enables high-performance perovskite solar cells with a high power conversion efficiency of 16.2% and with negligible hysteresis. Unlike previous approaches of reducing hysteresis by thermal annealing or fullerene passivation, the success of our approach can be mainly attributed to the doping of the PCBM layer using an insulating polymer (polystyrene) and an amine-containing polymeric semiconductor named PFNOX.

Keywords: doping of electron transport layer; highly efficient inverted perovskite solar cells; negligible hysteresis.