Sputtered PbI2 with Post-Processing for Perovskite Solar Cells

Jae Keun Hwang, Sang Won Lee, Wonkyu Lee, Soohyun Bae, Dongkyun Kang, Seok Hyun Jeong, Solhee Lee, Dowon Pyun, Ji Seong Hwang, Sujin Cho, Donghwan Kim, Yoonmook Kang, Hae Seok Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Conformal deposition of perovskite films on textured silicon surfaces using a dry process is crucial for producing high-performance perovskite/silicon tandem solar cells. Herein, a radio frequency magnetron sputtering process is used with a PbI2 target to deposit precursor films. Iodination, thermal annealing, and dimethyl sulfoxide treatment are employed as posttreatment processes to improve the stoichiometry, crystallinity, and surface morphology of the PbI2 precursor. The precursor films are converted into perovskite using direct contact conversion process, and the interfacial and bulk properties are enhanced by methylamine vapor annealing to fabricate perovskite solar cells with a power conversion efficiency of 12.2%. Also, 18.3% efficiency is confirmed at a wider voltage sweep range, which suggests that further efficiency improvement is possible by removing defects inside the perovskite. Finally, uniform perovskite films are conformally deposited on a 25 cm2 textured silicon surface. With such high-efficiency potential and conformality, the method of sputtering PbI2 can open a new way to fabricate perovskite/silicon tandem solar cells.

Original languageEnglish
Article number2300214
JournalSolar RRL
Volume7
Issue number14
DOIs
Publication statusPublished - 2023 Jul

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • conformal perovskite solar cells
  • large areas
  • perovskite/silicon tandem solar cells
  • posttreatment
  • sputtered PbI

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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