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Organic-inorganic hybrid Sn-based perovskite photodetectors with high external quantum efficiencies and wide spectral responses from 300 to 1000 nm

Title
Organic-inorganic hybrid Sn-based perovskite photodetectors with high external quantum efficiencies and wide spectral responses from 300 to 1000 nm
Authors
Wang, YukunYang, DezhiMa, DonggeKim, Dong HaAhamad, TansirAlshehri, Saad M.Vadim, Agafonv
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2019
Journal Title
SCIENCE CHINA-MATERIALS
ISSN
2095-8226JCR Link

2199-4501JCR Link
Citation
SCIENCE CHINA-MATERIALS vol. 62, no. 6, pp. 790 - 796
Keywords
organic-inorganic hybrid perovskitephotodetectorexternal quantum efficiencyspectral responsespecific detectivity
Publisher
SCIENCE PRESS
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
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.
DOI
10.1007/s40843-018-9377-3
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자연과학대학 > 화학·나노과학전공 > Journal papers
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