Solution-processed hybrid perovskite photodetectors with high detectivity

Letian Dou, Yang (Micheal) Yang, Jingbi You, Ziruo Hong (), Wei-Hsuan Chang, Gang Li and Yang Yang ()
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Letian Dou: University of California
Yang (Micheal) Yang: University of California
Jingbi You: University of California
Ziruo Hong: University of California
Wei-Hsuan Chang: University of California
Gang Li: University of California
Yang Yang: University of California

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Photodetectors capture optical signals with a wide range of incident photon flux density and convert them to electrical signals instantaneously. They have many important applications including imaging, optical communication, remote control, chemical/biological sensing and so on. Currently, GaN, Si and InGaAs photodetectors are used in commercially available products. Here we demonstrate a novel solution-processed photodetector based on an organic–inorganic hybrid perovskite material. Operating at room temperature, the photodetectors exhibit a large detectivity (the ability to detect weak signals) approaching 1014 Jones, a linear dynamic range over 100 decibels (dB) and a fast photoresponse with 3-dB bandwidth up to 3 MHz. The performance is significantly better than most of the organic, quantum dot and hybrid photodetectors reported so far; and is comparable, or even better than, the traditional inorganic semiconductor-based photodetectors. Our results indicate that with proper device interface design, perovskite materials are promising candidates for low-cost, high-performance photodetectors.

Date: 2014
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DOI: 10.1038/ncomms6404

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