Solution-processed Nb:SnO2 electron transport layer for efficient planar perovskite solar cells

Xiaodong Ren, Dong Yang, Zhou Yang, Jiangshan Feng, Xuejie Zhu, Jinzhi Niu, Yucheng Liu, Wangen Zhao, Shengzhong Frank Liu

Research output: Contribution to journalArticlepeer-review

190 Scopus citations

Abstract

Electron transport layer (ETL), facilitating charge carrier separation and electron extraction, is a key component in planar perovskite solar cells (PSCs). We developed an effective ETL using low-temperature solution-processed Nb-doped SnO2 (Nb:SnO2). Compared to the pristine SnO2, the power conversion efficiency of PSCs based on Nb:SnO2 ETL is raised to 17.57% from 15.13%. The splendid performance is attributed to the excellent optical and electronic properties of the Nb:SnO2 material, such as smooth surface, high electron mobility, appropriate electrical conductivity, therefore making a better growth platform for a high quality perovskite absorber layer. Experimental analyses reveal that the Nb:SnO2 ETL significantly enhances the electron extraction and effectively suppresses charge recombination, leading to improved solar cell performance.

Original languageEnglish (US)
Pages (from-to)2421-2429
Number of pages9
JournalACS Applied Materials and Interfaces
Volume9
Issue number3
DOIs
StatePublished - Jan 25 2017

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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