Enhanced Electrons Extraction of Lithium-Doped SnO2 Nanoparticles for Efficient Planar Perovskite Solar Cells

Waseem Ahmad, Detao Liu, Jiang Wu, Waqas Ahmad, Yafei Wang, Peng Zhang, Ting Zhang, Hualin Zheng, Li Chen, Zhi David Chen, Shibin Li

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Hybrid lead halide perovskite solar cells (PSCs) are amongst those efficient solar cell technologies which are developing rapidly. The rapid advancement in PSCs technology is because of favorable properties of perovskite materials and addition of charge selective layers. Here, we report lithium-doped SnO2 electron transport layer (ETL) to improve electrons extraction from the perovskite absorbing layer. The lithium-doped SnO2 not only shows relatively higher conductivity, reduced oxygen-deficient regions, improved oxidation state, but also induces a larger grain size of perovskite films. This leads to an improvement in all related photovoltaic parameters of the methylammonium lead iodide (MAPbI3) planar heterojunction PSCs. The champion device yields a power conversion efficiency of 19.09%. The simple solution and lower annealing processed ETLs are compatible with almost all substrates used in PSCs and other perovskite-based devices.

Original languageEnglish
Article number8765758
Pages (from-to)1273-1279
Number of pages7
JournalIEEE Journal of Photovoltaics
Issue number5
StatePublished - Sep 2019

Bibliographical note

Funding Information:
Manuscript received October 10, 2018; revised February 6, 2019; accepted June 18, 2019. Date of publication July 18, 2019; date of current version August 22, 2019. This work was supported in part by the National Natural Science Foundation of China under Grants 61874150, 61421002, and 61574029 and in part by the University of Kentucky. (Waseem Ahmad and Detao Liu contributed equally to this work.) (Corresponding author: Shibin Li.) W. Ahmad, D. Liu, W. Ahmad, Y. Wang, P. Zhang, T. Zhang, H. Zheng, L. Chen, and S. Li are with the State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China (e-mail: boslib@yahoo.com; liudetao1314@163.com; emam7214@ yahoo.com; bolowyf@126.com; pzhang1986@outlook.com; 417362524@ qq.com; zhenghualin@std.uestc.edu.cn; chen_li@uestc.edu.cn; shibinli@ uestc.edu.cn).

Publisher Copyright:
© 2011-2012 IEEE.


  • Lithium doping
  • SnO nanoparticles
  • low annealing process
  • perovskite solar cells (PSCs)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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