Precisely Controlled Ultrastrong Photoinduced Doping at Graphene-Heterostructures Assisted by Trap-State-Mediated Charge Transfer.

Ho, Po-Hsun; Chen, Chun-Hsiang; Shih, Fu-Yu; Chang, Yih-Ren; Li, Shao-Sian; Wang, Wei-Hua; Shih, Min-Chuan; Chen, Wei-Ting et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

Ultrastrong and precisely controllable n-type photoinduced doping at a graphene/TiOx heterostructure as a result of trap-state-mediated charge transfer is demonstrated, which is much higher than any other reported photodoping techniques. Based on the strong light-matter interactions at the graphene/TiOx heterostructure, precisely controlled photoinduced bandgap opening of a bilayer graphene device is demonstrated.