articleLight Science & ApplicationsMar 3, 2020GOLD OA

Ultrafast and broadband photodetectors based on a perovskite/organic bulk heterojunction for large-dynamic-range imaging

CLChenglong LiHWHailu WangFWFang WangTLTengfei LiMXMengjian Xu

Jilin University · State Key Laboratory on Integrated Optoelectronics · +6 more institutions

PubMed
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Abstract

Organic-inorganic hybrid perovskite (OIHP) photodetectors that simultaneously achieve an ultrafast response and high sensitivity in the near-infrared (NIR) region are prerequisites for expanding current monitoring, imaging, and optical communication capbilities. Herein, we demonstrate photodetectors constructed by OIHP and an organic bulk heterojunction (BHJ) consisting of a low-bandgap nonfullerene and polymer, which achieve broadband response spectra up to 1 μm with a highest external quantum efficiency of approximately 54% at 850 nm, an ultrafast response speed of 5.6 ns and a linear dynamic range (LDR) of 191 dB. High sensitivity, ultrafast speed and a large LDR are preeminent prerequisites for the…

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Topics & keywords

Topics
Keywords
  • Photodetector
  • Materials science
  • Ultrashort pulse
  • Optoelectronics
  • Heterojunction
  • Perovskite (structure)
  • Broadband
  • Dynamic range
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