Photostriction of CH3NH3PbBr3 Perovskite Crystals

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

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Author(s)

  • Tzu-Chiao Wei
  • Hsin-Ping Wang
  • Ting-You Li
  • Chun-Ho Lin
  • Ying-Hui Hsieh
  • Ying-Hao Chu

Detail(s)

Original languageEnglish
Article number1701789
Journal / PublicationAdvanced Materials
Volume29
Issue number35
Online published17 Jul 2017
Publication statusPublished - 20 Sept 2017
Externally publishedYes

Abstract

Organic–inorganic hybrid perovskite materials exhibit a variety of physical properties. Pronounced coupling between phonon, organic cations, and the inorganic framework suggest that these materials exhibit strong light–matter interactions. The photoinduced strain of CH3NH3PbBr3 is investigated using high-resolution and contactless in situ Raman spectroscopy. Under illumination, the material exhibits large blue shifts in its Raman spectra that indicate significant structural deformations (i.e., photostriction). From these shifts, the photostrictive coefficient of CH3NH3PbBr3 is calculated as 2.08 × 10−8 m2 W−1 at room temperature under visible light illumination. The significant photostriction of CH3NH3PbBr3 is attributed to a combination of the photovoltaic effect and translational symmetry loss of the molecular configuration via strong translation–rotation coupling. Unlike CH3NH3PbI3, it is noted that the photostriction of CH3NH3PbBr3 is extremely stable, demonstrating no signs of optical decay for at least 30 d. These results suggest the potential of CH3NH3PbBr3 for applications in next-generation optical micro-electromechanical devices.

Research Area(s)

  • CH3NH3PbBr3, perovskites, photostriction, Raman

Citation Format(s)

Photostriction of CH3NH3PbBr3 Perovskite Crystals. / Wei, Tzu-Chiao; Wang, Hsin-Ping; Li, Ting-You et al.
In: Advanced Materials, Vol. 29, No. 35, 1701789, 20.09.2017.

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