Tailoring Phase Alignment and Interfaces via Polyelectrolyte Anchoring Enables Large-Area 2D Perovskite Solar Cells

Chenxu Han, Yao Wang, Jiabei Yuan, Jianguo Sun, Xuliang Zhang, Claudio Cazorla, Xianxin Wu, Ziang Wu, Junwei Shi, Junjun Guo, Hehe Huang, Long Hu, Xinfeng Liu, Han Young Woo, Jianyu Yuan, Wanli Ma

Research output: Contribution to journalArticlepeer-review

Abstract

Ruddlesden–Popper phase 2D perovskite solar cells (PSCs) exhibit improved lifetime while still facing challenges such as phase alignment and up-scaling to module-level devices. Herein, polyelectrolytes are explored to tackle this issue. The contact between perovskite and hole-transport layer (HTL) is important for decreasing interfacial non-radiative recombination and scalable fabrication of uniform 2D perovskite films. Through exploring compatible butylamine cations, we first demonstrate poly(3-(4-carboxybutyl)thiophene-2,5-diyl)-butylamine (P3CT-BA) as an efficient HTL for 2D PSCs due to its great hydrophilicity, relatively high hole mobility and uniform surface. More importantly, the tailored P3CT-BA has an anchoring effect and acts as the buried passivator for 2D perovskites. Consequently, a best efficiency approaching 18 % was achieved and we further first report large-area (2×3 cm2, 5×5 cm2) 2D perovskite minimodules with an impressive efficiency of 14.81 % and 11.13 %, respectively.

Original languageEnglish
Article numbere202205111
JournalAngewandte Chemie - International Edition
Volume61
Issue number36
DOIs
Publication statusPublished - 2022 Sep 5

Keywords

  • 2D Perovskites
  • Polyelectrolytes
  • Ruddelsden–Popper Phase
  • Solar Cells

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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