Co-Deposition of Hole-Selective Contact and Absorber for Improving the Processability of Perovskite Solar Cells

Xiaopeng Zheng, Zhen Li, Yi Zhang, Min Chen, Tuo Liu, Chuanxiao Xiao, Danpeng Gao, Jay Patel, Darius Kuciauskas, Artiom Magomedov, Rebecca Scheidt, Xiaoming Wang, Steven Harvey, Zhenghong Dai, Chunlei Zhang, Daniel Morales, Henry Pruett, Brian Wieliczka, Ahmad Kirmani, Nitin PadtureKenneth Graham, Yanfa Yan, Mohammad Nazeeruddin, Michael McGehee, Zonglong Zhu, Joseph Luther

Research output: Contribution to journalArticlepeer-review

49 Scopus Citations

Abstract

Simplifying the manufacturing processes of renewable energy technologies is crucial to lowering the barriers to commercialization. In this context, to improve the manufacturability of perovskite solar cells (PSCs), we have developed a one-step solution-coating procedure in which the hole-selective contact and perovskite light absorber spontaneously form, resulting in efficient inverted PSCs. We observed that phosphonic or carboxylic acids, incorporated into perovskite precursor solutions, self-assemble on the indium tin oxide substrate during perovskite film processing. They form a robust self-assembled monolayer as an excellent hole-selective contact while the perovskite crystallizes. Our approach solves wettability issues and simplifies device fabrication, advancing the manufacturability of PSCs. Our PSC devices with positive–intrinsic–negative (p-i-n) geometry show a power conversion efficiency of 24.5% and retain >90% of their initial efficiency after 1,200 h of operating at the maximum power point under continuous illumination. The approach shows good generality as it is compatible with different self-assembled monolayer molecular systems, perovskites, solvents and processing methods.

Original languageAmerican English
Pages (from-to)462-472
Number of pages11
JournalNature Energy
Volume8
Issue number5
DOIs
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer Nature Limited.

NREL Publication Number

  • NREL/JA-5900-82595

Keywords

  • crystallization
  • perovskite
  • photovoltaics
  • self-assembled monolayer

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