Efficient planar perovskite solar cells with improved fill factor via interface engineering with graphene

Xiaojuan Zhao, Leiming Tao, Hao Li, Wenchao Huang, Pengyu Sun, Jun Liu, Shuangshuang Liu, Qiang Sun, Zhifang Cui, Lijie Sun, Yan Shen, Yang Yang, Mingkui Wang

Research output: Contribution to journalArticleResearchpeer-review

126 Citations (Scopus)

Abstract

Organic-inorganic hybrid lead halide perovskites have been widely investigated in optoelectronics both experimentally and theoretically. The present work incorporates chemically modified graphene into nanocrystal SnO2 as the electron transporting layer (ETL) for highly efficient planar perovskite solar cells. The modification of SnO2 with highly conductive two-dimensional naphthalene diimide-graphene can increase surface hydrophobicity and form van der Waals interaction between the surfactant and the organic-inorganic hybrid lead halide perovskite compounds. As a result, highly efficient perovskite solar cells with power conversion efficiency of 20.2% can be achieved with an improved fill factor of 82%, which could be mainly attributed to the augmented charge extraction and transport.

Original languageEnglish
Pages (from-to)2442-2449
Number of pages8
JournalNano Letters
Volume18
Issue number4
DOIs
Publication statusPublished - 11 Apr 2018
Externally publishedYes

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