Optimizing the Buried Interface in Flexible Perovskite Solar Cells to Achieve Over 24% Efficiency and Long-Term Stability

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Ruoyao Xu
  • Fang Pan
  • Jinyu Chen
  • Jingrui Li
  • Yingguo Yang
  • Yulu Sun
  • Xinyi Zhu
  • Peizhou Li
  • Xiangrong Cao
  • Jun Xi
  • Jie Xu
  • Fang Yuan
  • Jinfei Dai
  • Chuantian Zuo
  • Liming Ding
  • Hua Dong
  • Zhaoxin Wu

Detail(s)

Original languageEnglish
Article number2308039
Journal / PublicationAdvanced Materials
Volume36
Issue number7
Online published7 Dec 2023
Publication statusPublished - 15 Feb 2024

Abstract

The buried interface of the perovskite layer has a profound influence on its film morphology, defect formation, and aging resistance from the outset, therefore, significantly affects the film quality and device performance of derived perovskite solar cells. Especially for FAPbI3, although it has excellent optoelectronic properties, the spontaneous transition from the black perovskite phase to nonperovskite phase tends to start from the buried interface at the early stage of film formation then further propagate to degrade the whole perovskite. In this work, by introducing ─NH3+ rich proline hydrochloride (PF) with a conjugated rigid structure as a versatile medium for buried interface, it not only provides a solid α-phase FAPbI3 template, but also prevents the phase transition induced degradation. PF also acts as an effective interfacial stress reliever to enhance both efficiency and stability of flexible solar cells. Consequently, a champion efficiency of 24.61% (certified 23.51%) can be achieved, which is the highest efficiency among all reported values for flexible perovskite solar cells. Besides, devices demonstrate excellent shelf-life/light soaking stability (advanced level of ISOS stability protocols) and mechanical stability. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • buried interface, flexible, perovskite solar cells, phase stability, stability

Citation Format(s)

Optimizing the Buried Interface in Flexible Perovskite Solar Cells to Achieve Over 24% Efficiency and Long-Term Stability. / Xu, Ruoyao; Pan, Fang; Chen, Jinyu et al.
In: Advanced Materials, Vol. 36, No. 7, 2308039, 15.02.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review