Photo-induced defects in MAPbBr(3) single crystals
- 주제(키워드) perovskite single crystals , CH3NH3PbBr3 , defect characterization , transient photoresponse
- 주제(기타) Energy & Fuels; Materials Science, Multidisciplinary
- 설명문(일반) [Cho, Yunae; Jung, Hye Ri; Jo, William] Ewha Womans Univ, New & Renewable Energy Res Ctr NREC, Seoul, South Korea; [Jo, William] Ewha Womans Univ, Dept Phys, Seoul, South Korea
- 등재 SCIE, SCOPUS
- OA유형 gold
- 발행기관 IOP PUBLISHING LTD
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000183627
- 본문언어 영어
- Published As http://dx.doi.org/10.1088/2515-7655/ac27b3
초록/요약
Single crystals of hybrid organic-inorganic halide perovskite have exhibited significantly good stability and a low trap density, leading to advantageous applications in optoelectronics. Even with recent development of high-quality perovskite single crystals, a defect analysis should be addressed to improve device performance in addition to understand the interaction between photo-generated carriers and defects. In this paper, we present a photo-induced defect characterization of CH3NH3PbBr3 (MAPbBr(3)) perovskite single crystals using an interpretation of photo-current and photo-capacitance measurement. The bulk and the interfacial defect densities of MAPbBr(3) crystals with a gold electrode are examined by the characterization of photo-capacitive response under three different wavelengths of light. The transient photo-response of the single crystals reveals the occurrence of carrier trapping and a recombination process. The photo-response under the various light conditions provides a possible origin of defects in MAPbBr(3) single crystals. Our comprehensive optoelectronic analysis provides the establishment of the link between the carrier transport and device performance depending on the illuminations. The fundamental understanding of photo-induced defects in perovskites can be helpful to realize the origin of electrical loss and develop highly efficient optoelectronic devices.
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