Organic-inorganic hybrid Sn-based perovskite photodetectors with high external quantum efficiencies and wide spectral responses from 300 to 1000 nm
- 주제(키워드) organic-inorganic hybrid perovskite , photodetector , external quantum efficiency , spectral response , specific detectivity
- 주제(기타) Materials Science, Multidisciplinary
- 설명문(일반) [Wang, Yukun; Yang, Dezhi; Ma, Dongge] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China; [Wang, Yukun; Kim, Dong Ha] Ewha Womans Univ, Dept Chem & Nano Sci, 52 Ewhayeodae Gil, Seoul 03760, South Korea; [Ma, Dongge; Ahamad, Tansir; Alshehri, Saad M.] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia; [Vadim, Agafonv] Moscow Inst Phys & Technol Dolgoprudny, Dolgoprudnyi 141700, Moscow Region, Russia
- 등재 SCIE, SCOPUS
- OA유형 Bronze
- 발행기관 SCIENCE PRESS
- 발행년도 2019
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000171906
- 본문언어 영어
- Published As https://dx.doi.org/10.1007/s40843-018-9377-3
초록/요약
Organic-inorganic hybrid perovskites are ideal materials for photodetection owing to their high charge carrier mobility, long charge carrier diffusion length, low dark current density and sharp absorption edge. However, a relatively small band gap (1.6 eV) limits their photo-nharvesting efficiency in the near-infrared region. In the present work, we demonstrate a hybrid methylamine iodide and Pb-Sn binary perovskite as the light absorption layer in photodetectors. Experimentally, the wavelength of photo-response onset for the photodetectors can be extended to as great as 1,000 nm when the Sn content of the hybrid perovskite is increased to 30 mol%. In addition, the photodetectors exhibit a photoresponsivity of 0.39 A W-1 a specific detectivity of 7x10(12) Jones, a fast photoresponse with rise and decay time constants and an external quantum efficiency greater than 50% in the wavelength range of 350-900 nm, with a maximum value of about 80% at 550 nm.
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