Sensitive Solution-Processed Bi 2 S 3 Nanocrystalline Photodetectors
2008; American Chemical Society; Volume: 8; Issue: 11 Linguagem: Inglês
10.1021/nl802600z
ISSN1530-6992
AutoresGerasimos Konstantatos, Larissa Levina, Jiang Tang, Edward H. Sargent,
Tópico(s)Perovskite Materials and Applications
ResumoSolution-processed nanocrystal optoelectronic devices offer large-area coverage, low cost, and compatibility with a wide range of substrates. Recently, photodetectors and photovoltaics based on spin-coated nanoparticle films have shown tremendous progress in performance. However, high-performance devices reported to date have employed either Pb or Cd, raising concerns regarding environmental impact and regulatory acceptance. Herein we report a high-performance solution-processed photodetector based instead on Bi2S3 nanocrystals. The devices exhibit photoconductive gain on the order of 10 combined with temporal response on the 10 ms time scale. The resultant solution-processed Bi2S3 nanorod photoconductive photodetectors are of interest in visible and near-infrared (NIR) wavelength applications requiring video-frame-rate temporal response.
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