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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

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
Pages (from-to)1-10
Number of pages10
JournalAngewandte Chemie - International Edition
Volume61
Issue number36
DOIs
Publication statusPublished - 5 Sept 2022

Keywords

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

Fingerprint

Dive into the research topics of 'Tailoring phase alignment and interfaces via polyelectrolyte anchoring enables large-area 2D perovskite solar cells'. Together they form a unique fingerprint.

Cite this