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Science China Materials

, Volume 62, Issue 6, pp 790–796 | Cite as

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

  • Yukun Wang (王玉坤)
  • Dezhi Yang (杨德志)
  • Dongge Ma (马东阁)Email author
  • Dong Ha Kim (金东海)
  • Tansir Ahamad
  • Saad M. Alshehri
  • Agafonv Vadim
Articles
  • 148 Downloads

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 7×1012 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.

Keywords

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

具有高外量子效率和宽光谱(300~1000 nm)响应的有机-无机杂化锡基钙钛矿光电探测器

摘要

有机-无机杂化钙钛矿材料具有载流子迁移率高、 扩散长度长、 暗电流密度低、 吸收边缘锋利等优点, 因而成为用于光电探测的理想材料. 但是, 相对较小的带隙(1.6 eV)限制了这些材料在近红外区的光子捕获效率. 本研究中, 我们利用碘甲胺和铅-锡二元钙钛矿作为探测器的光吸收层, 导电聚合物和富勒烯作为空穴和电子传输层, 铟锡氧化物和铝作为阳极和阴极制备了光电探测器件. 实验结果表明, 当锡的含量达到30%时, 探测器的光谱响应拓宽到1000 nm. 此外, 我们制备的探测器的光谱响应度达到0.39 A W−1, 归一化探测率达到 7×1012 Jones. 器件的外量子效率在350到900 nm范围内, 均超过50%, 在550 nm处取得最大值, 超过80%.

Notes

Acknowledgements

The authors gratefully acknowledge the International Cooperation Foundation of China (2015DFR10700), the National Natural Science Foundation of China (51403203) for the support of this research. Prof. Ma D extends his appreciation to the Distinguished Scientist Fellowship Program (DSFP) at King Saud University, Riyadh, Kingdom of Saudi Arabia for financial support. Prof. Agafonov Vadim thanks the support of the Russian Ministry of Education and Science state assignment No 3.3197.2017/ПЧ.

Supplementary material

40843_2018_9377_MOESM1_ESM.pdf (714 kb)
Organic-Inorganic Hybrid Sn-based Perovskite Photodetectors with High External Quantum Efficiencies and Wide Spectral Responses from 300 to 1000 nm

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Yukun Wang (王玉坤)
    • 1
    • 2
  • Dezhi Yang (杨德志)
    • 1
  • Dongge Ma (马东阁)
    • 1
    • 3
    Email author
  • Dong Ha Kim (金东海)
    • 2
  • Tansir Ahamad
    • 3
  • Saad M. Alshehri
    • 3
  • Agafonv Vadim
    • 4
  1. 1.Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouChina
  2. 2.Department of Chemistry and Nano ScienceEwha Womans UniversitySeoulKorea
  3. 3.Department of Chemistry, College of ScienceKing Saud UniversityRiyadhKingdom of Saudi Arabia
  4. 4.Moscow Institute of Physics and TechnologyDolgoprudny, Moscow RegionRussia

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