In situ formation of Ag2MoO4in a Ag/MoO3buffer layer enables highly efficient inverted perovskite cell for a tandem structure

Zilong Wang, Di Lu, Jingjing Jiang, Weibo Yan, Yuancai Gong, Sanping Wu, Yifan Zhang, Wei Huang, Hao Xin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The tandem structure using perovskite front cells is a very promising strategy to overcome the Shockley-Queisser limit. The transparency of the front cell window layer is the key to maximize incident light utilization efficiency. A buffer layer is required to prevent the organic materials from sputtering damage when conducting metal oxides are used as the window layer. Here, we report a combination of Ag (1 nm) and MoO3 (3 nm) as a buffer layer to fabricate a highly efficient inverted perovskite front cell. Characterizations show MoO3 reacts with predeposited Ag and forms Ag2MoO4, resulting in a dense, continuous, and uniform protection layer. Importantly, the intrinsic electron-transport property and matched energy levels of Ag2MoO4 with adjacent layer materials greatly improve charge carrier collection efficiency, resulting in a 65% enhancement in efficiency compared to the Ag-only buffer layer. Our results demonstrate that the in situ reaction of an oxide with a metal is a simple strategy to build functional ultrathin films.

Original languageEnglish
Pages (from-to)9742-9749
Number of pages8
JournalACS Applied Energy Materials
Volume3
Issue number10
DOIs
StatePublished - 26 Oct 2020
Externally publishedYes

Keywords

  • AgMoO
  • In situ reaction
  • Perovskite
  • Tandem solar cell
  • Transparent electrode

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