Architecturing 1D-2D-3D Multidimensional Coupled CsPbI2Br Perovskites toward Highly Effective and Stable Solar Cells

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

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Author(s)

  • Kun Liu
  • Songyang Yuan
  • Yeming Xian
  • Yi Long
  • Qin Yao
  • Naveed Ur Rahman
  • Yang Guo
  • Mingyuan Sun
  • Qifan Xue
  • Andreu Cabot
  • Wenzhe Li
  • Jiandong Fan

Detail(s)

Original languageEnglish
Article number2100888
Journal / PublicationSmall
Volume17
Issue number25
Online published25 May 2021
Publication statusPublished - 24 Jun 2021
Externally publishedYes

Abstract

Despite the rapid development of CsPbIxBr3−x (0 ≤ x ≤ 3) inorganic perovskite solar cells, associated with their superior thermal stability, their low moisture stability limits their commercial deployment. In this study, 1D-2D-3D multidimensional coupled perovskites are prepared by means of an in situ self-integration approach. This pioneering method allows incorporating thus far unreported 1D-Tpy2Pb3I6 and 2D-TpyPb3I6 (Tpy; terpyridine) perovskites. Heterojunction perovskites demonstrate superior stability against water in comparison with control 3D CsPbI2Br, which is related to the hydrophobicity of low-dimension (LD) perovskites. Remarkably, the spontaneous involvement of LD perovskites can adjust/reconstruct the interfacial structure. This modification allows releasing the residual strain, establishing effective charge transfer channels that increase the carrier transport ability. Accordingly, 1D-2D-3D hybrid CsPbI2Br perovskite solar cells demonstrate a stabilized power conversion efficiency as high as 16.1%, which represents a very significant improvement, by a factor of 43%, with respect to control 3D CsPbI2Br perovskite solar cell. Equally importantly, the multidimensional coupled perovskite solar cells exhibit extraordinary stability, well above 1000 h in ambient atmosphere.

Research Area(s)

  • carrier transport, CsPbI 2Br perovskite solar cells, heterojunctions, stability, strain relaxation

Citation Format(s)

Architecturing 1D-2D-3D Multidimensional Coupled CsPbI2Br Perovskites toward Highly Effective and Stable Solar Cells. / Liu, Kun; Yuan, Songyang; Xian, Yeming; Long, Yi; Yao, Qin; Rahman, Naveed Ur; Guo, Yang; Sun, Mingyuan; Xue, Qifan; Yip, Hin-Lap; Cabot, Andreu; Li, Wenzhe; Fan, Jiandong.

In: Small, Vol. 17, No. 25, 2100888, 24.06.2021.

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