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

Translated title of the contribution: Organic-inorganic hybrid Sn-based perovskite photodetectors with high external quantum efficiencies and wide spectral responses from 300 to 1000 nm

Yukun Wang, Dezhi Yang, Dongge Ma, Dong Ha Kim, Tansir Ahamad, Saad M. Alshehri, Agafonv Vadim

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

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 photon-harvesting 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 photoresponse 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 7×10 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.

Translated title of the contributionOrganic-inorganic hybrid Sn-based perovskite photodetectors with high external quantum efficiencies and wide spectral responses from 300 to 1000 nm
Original languageEnglish
Pages (from-to)790-796
Number of pages7
JournalScience China Materials
Volume62
Issue number6
DOIs
StatePublished - 1 Jun 2019

Bibliographical note

Publisher Copyright:
© 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

  • external quantum efficiency
  • organic-inorganic hybrid perovskite
  • photodetector
  • specific detectivity
  • spectral response

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