Mild water intake orients crystal formation imparting high tolerance on unencapsulated halide 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)

  • Hsin-Hsiang Huang
  • Zhiyuan Ma
  • Joseph Strzalka
  • King-Fu Lin
  • Leeyih Wang
  • Hua Zhou
  • Zhang Jiang
  • Wei Chen

Detail(s)

Original languageEnglish
Article number100395
Journal / PublicationCell Reports Physical Science
Volume2
Issue number4
Online published8 Apr 2021
Publication statusPublished - 21 Apr 2021
Externally publishedYes

Link(s)

Abstract

The irreversible phase transition by water incorporation, along with thermal decomposition, has long been thought to be the dominant degradation pathway to deteriorate electronic and optoelectronic properties of perovskite devices. However, comprehensive characterization and insightful understanding of beneficial effect of water incorporation remains scarce. Here, we capture the phase transformation of perovskite in situ from its precursor stage to the final film upon thermal annealing as a function of relative humidity (RH) by grazing-incident wide-angle X-ray scattering. Quantitative structural analyses show that a moderate water content (RH 40%) enhances the texture orientation of the perovskite. A consequence of the guided water-incorporated treatment is that the unencapsulated device, without any sophisticated instability-mitigation approaches, exhibits excellent tolerance to long-term, light soaking and high-temperature aging, retaining more than 80% of the peak power-conversion efficiency under constant 1-sun illumination or heating at 65°C for more than 1,000 h, respectively.

Research Area(s)

  • in situ GIWAXS, long-term stability, perovskite photovoltaic, water incorporation

Citation Format(s)

Mild water intake orients crystal formation imparting high tolerance on unencapsulated halide perovskite solar cells. / Huang, Hsin-Hsiang; Ma, Zhiyuan; Strzalka, Joseph; Ren, Yang; Lin, King-Fu; Wang, Leeyih; Zhou, Hua; Jiang, Zhang; Chen, Wei.

In: Cell Reports Physical Science, Vol. 2, No. 4, 100395, 21.04.2021.

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

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