Efficient planar heterojunction perovskite solar cells with Li-doped compact TiO2 layer

Detao Liu, Shibin Li, Peng Zhang, Yafei Wang, Rui Zhang, Hojjatollah Sarvari, Feng Wang, Jiang Wu, Zhiming Wang, Zhi David Chen

Research output: Contribution to journalArticlepeer-review

244 Scopus citations

Abstract

Perovskite solar cells (PSCs) have been developed rapidly in recent time, and efficient planar PSCs are regarded as the most promising alternative to the Si solar cells. In this study, we demonstrated that Li-doping of compact TiO2 can reduce the density of electron traps and increase the conductivity of the electron transport layer (ETL) of PSCs. Due to the improved electronic property of ETL, the Li-doped compact TiO2 based planar heterojunction PSCs exhibit negligible hysteretic J-V behavior. Comparing with the undoped compact TiO2 based PSCs, the power conversion efficiency (PCE) of the Li-doped compact TiO2 film based PSCs is improved from 14.2% to 17.1%. Fabrication of highly efficient planar PSCs provides a pathway for commercialization of PSCs.

Original languageEnglish
Pages (from-to)462-468
Number of pages7
JournalNano Energy
Volume31
DOIs
StatePublished - Jan 1 2017

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd

Keywords

  • CHNHPbI
  • Less- hysteresis
  • Li-doping TiO
  • Planar heterojunction perovskite solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Electrical and Electronic Engineering

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