High-Performance Phototransistor of Epitaxial PbS Nanoplate-Graphene Heterostructure with Edge Contact.

Wang, Qisheng; Wen, Yao; He, Peng; Yin, Lei; Wang, Zhenxing; Wang, Feng; Xu, Kai; Huang, Yun et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

Fast infrared response (rising time = 24 ms) and ultrahigh photoconductive gain (10(8) ) are obtained in epitaxial PbS-nanoplate-graphene heterostructures. Combining density functional theory with experiments, this study finds single-crystalline PbS nanoplates are covalently bound to the grapheme edge with strong chemical hybridization, which offers a fast carrier transmission path.