Bilayer graphene/HgCdTe based very long infrared photodetector with superior external quantum efficiency, responsivity, and detectivity.

ABSTRACT: We present a high-performance bilayer graphene (BLG) and mercury cadmium telluride (Hg_1-x Cd _x=0.1867Te) heterojunction based very long wavelength infrared (VLWIR) conductive photodetector. The unique absorption properties of graphene enable a long carrier lifetime of charge carriers contributing to the carrier-multiplication due to impact ionization and, hence, large photocurrent and high quantum efficiency. The proposed p⁺-BLG/n-Hg_0.8133Cd_0.1867Te photodetector is characterized and analyzed in terms of different electrical and optical characteristic parameters using computer simulations. The obtained results are further validated by developing an analytical model based on drift-diffusion, tunneling and Chu's methods. Th

SUBMITTER: Bansal S 

PROVIDER: S-EPMC9090716 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature