Effects of ZnIdoping on the performance of methylammonium-free perovskite solar cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Lei Yan
  • Zhenchao Li
  • Tianqi Niu
  • Xiang Xu
  • Shenkun Xie
  • Guanping Dong
  • Qifan Xue

Detail(s)

Original languageEnglish
Article number043102
Journal / PublicationJournal of Applied Physics
Volume128
Issue number4
Online published23 Jul 2020
Publication statusPublished - 28 Jul 2020
Externally publishedYes

Abstract

Methylammonium (MA)-free perovskite solar cells (PVSCs) have obtained great attention recently, owing to their superior stability. However, there are still gaps in efficiency between MA-free PVSCs and MA-containing counterparts. Their stability still needs to be further enhanced for meeting commercial standards, especially the illumination stability. Here, we incorporate Zn2+ into perovskite thin films to passivate defects, successfully achieving a champion efficiency of 20.7% and reinforcing the stability of MA-free FA0.9Cs0.1PbI3 PVSCs. This study reveals that Zn-doping can increase the grain size and contribute to modulate the crystallization process. Moreover, it is found that most of the Zn2+ aggregates at the grain boundaries passivating defects and, thus, effectively restrain the non-radiative recombination in the PVSCs. These findings provide a new way of realizing highly efficient and stable PVSCs.

Citation Format(s)

Effects of ZnIdoping on the performance of methylammonium-free perovskite solar cells. / Yan, Lei; Li, Zhenchao; Niu, Tianqi; Xu, Xiang; Xie, Shenkun; Dong, Guanping; Xue, Qifan; Yip, Hin-Lap.

In: Journal of Applied Physics, Vol. 128, No. 4, 043102, 28.07.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review