Argon Plasma Treatment to Tune Perovskite Surface Composition for High Efficiency Solar Cells and Fast Photodetectors

Xun Xiao, Chunxiong Bao, Yanjun Fang, Jun Dai, Benjamin R. Ecker, Congcong Wang, Yuze Lin, Shi Tang, Ye Liu, Yehao Deng, Xiaopeng Zheng, Yongli Gao, Xiao Cheng Zeng, Jinsong Huang

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

Abstract

The surface composition of perovskite films is very sensitive to film processing and can deviate from the optimal, which generates unfavorable defects and results in efficiency loss in solar cells and slow response speed in photodetectors. An argon plasma treatment is introduced to modify the surface composition by tuning the ratio of organic and inorganic components as well as defect type before deposition of the passivating layer. It can efficiently enhance the charge collection across the perovskite–electrode interface by suppressing charge recombination. Therefore, perovskite solar cells with argon plasma treatment yield enhanced efficiency to 20.4% and perovskite photodetectors can reach their fastest respond speed, which is solely limited by the carrier mobility.

Original languageEnglish (US)
Article number1705176
JournalAdvanced Materials
Volume30
Issue number9
DOIs
StatePublished - Mar 1 2018

Keywords

  • argon plasma
  • perovskites
  • photodetectors
  • solar cells

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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