Gate-tunable, high-responsivity, and room-temperature infrared photodetectors based on a graphene-Bi2Se3 heterostructure

Jaeseok Kim; Houk Jang; Nikesh Koirala; Sangwan Sim; Jae-bok Lee; Un Jeong Kim; Hyangsook Lee; Soonyoung Cha; Chihun In; Jun Park; Jekwan Lee; Matthew Brahlek; Jisoo Moon; Maryam Salehi; Seongshik Oh; Seongshik Oh; Jong-Hyun Ahn; Sungwoo Hwang; Dohun Kim; Hyunyong Choi

doi:10.1364/CLEO_SI.2016.SF2E.3

Conference on Lasers and Electro-Optics
OSA Technical Digest (2016) (Optica Publishing Group, 2016),
paper SF2E.3
•https://doi.org/10.1364/CLEO_SI.2016.SF2E.3

Gate-tunable, high-responsivity, and room-temperature infrared photodetectors based on a graphene-Bi₂Se₃ heterostructure

Jaeseok Kim, Houk Jang, Nikesh Koirala, Sangwan Sim, Jae-bok Lee, Un Jeong Kim, Hyangsook Lee, Soonyoung Cha, Chihun In, Jun Park, Jekwan Lee, Matthew Brahlek, Jisoo Moon, Maryam Salehi, Seongshik Oh, Jong-Hyun Ahn, Sungwoo Hwang, Dohun Kim, and Hyunyong Choi

CLEO: Science and Innovations 2016

San Jose, California United States
5–10 June 2016
ISBN: 978-1-943580-11-8

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Two-Dimensional Materials (SF2E)

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J. Kim, H. Jang, N. Koirala, S. Sim, J. Lee, U. J. Kim, H. Lee, S. Cha, C. In, J. Park, J. Lee, M. Brahlek, J. Moon, M. Salehi, S. Oh, J. Ahn, S. Hwang, D. Kim, and H. Choi, "Gate-tunable, high-responsivity, and room-temperature infrared photodetectors based on a graphene-Bi2Se3 heterostructure," in Conference on Lasers and Electro-Optics, OSA Technical Digest (2016) (Optica Publishing Group, 2016), paper SF2E.3.

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Abstract

We demonstrate infrared photodetectors based on graphene-Bi₂Se₃ heterostructures with high responsivity (≥1.9 A/W) at room temperature. Strong photogating effect across the tunneling barrier and built-in potential enables the internal quantum efficiency larger than 100 %.

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