Applied Science and Convergence Technology

The Korean Vacuum Society (한국진공학회)
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Optical Characterization of Cubic and Pseudo-cubic Phase Perovskite Single Crystals Depending on Laser Irradiation Time

  • Received : 2018.03.28
  • Accepted : 2018.03.30
  • Published : 2018.03.31
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Abstract

Photovoltaic and optoelectronic devices based on hybrid metal halide perovskites ($MAPbX_3$; $MA=CH_3NH_3{^+}$, $X=Cl^-$, $Br^-$, or $I^-$) are rapidly improving in power conversion efficiency. Also, during recent years, perovskite single crystals have emerged as promising materials for high-efficiency photovoltaic and optoelectronic devices because of their low defect density. Here we show that the light soaking effect of mixed halide perovskite ($MAPbBr_{3-x}I_x$) single crystals can be explained using photoluminescence, time-resolved photoluminescence, and Raman scattering measurements. Unlike Br-based single crystal, Br/I mixed single crystal show a strong light soaking effect under laser irradiation condition that was related to the existence of multiple phases.

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