A MoSe2/WSe2 Heterojunction-Based Photodetector at Telecommunication Wavelengths

Hui Xue (Corresponding Author), Yadong Wang, Yunyun Dai, Wonjae Kim, Henri Jussila, Mei Qi, Jannatul Susoma, Zhaoyu Ren, Qing Dai, Jianlin Zhao, Kari Halonen, Harri Lipsanen, Xiaomu Wang, Xuetao Gan, Zhipei Sun

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Abstract

van der Waals (vdW) heterojunctions enable arbitrary combinations of different layered semiconductors with unique band structures, offering distinctive band engineering for photonic and optoelectronic devices with new functionalities and superior performance. Here, an interlayer photoresponse of a few-layer MoSe2/WSe2 vdW heterojunction is reported. With proper electrical gating and bias, the heterojunction exhibits high-sensitivity photodetection with the operation wavelength extended up to the telecommunication band (i.e. 1550 nm). The photoresponsivity and normalized photocurrent-to-dark current ratio reach up to 127 mA W−1 and 1.9 × 104 mW−1, respectively. The results not only provide a promising solution to realize high-performance vdW telecommunication band photodetectors, but also pave the way for using sub-bandgap engineering of two-dimensional layered materials for photonic and optoelectronic applications.

LanguageEnglish
Article number1804388
JournalAdvanced Functional Materials
Volume28
Issue number47
DOIs
Publication statusPublished - 21 Nov 2018
MoE publication typeNot Eligible

Fingerprint

Photodetectors
Telecommunication
photometers
Heterojunctions
telecommunication
heterojunctions
Wavelength
Optoelectronic devices
wavelengths
Photonic devices
Dark currents
engineering
photonics
Photocurrents
Band structure
Photonics
Energy gap
optoelectronic devices
dark current
photocurrents

Keywords

  • MoSe
  • photodetectors
  • sub-bandgap photodetection
  • van der Waals heterojunction
  • WSe

Cite this

Xue, Hui ; Wang, Yadong ; Dai, Yunyun ; Kim, Wonjae ; Jussila, Henri ; Qi, Mei ; Susoma, Jannatul ; Ren, Zhaoyu ; Dai, Qing ; Zhao, Jianlin ; Halonen, Kari ; Lipsanen, Harri ; Wang, Xiaomu ; Gan, Xuetao ; Sun, Zhipei. / A MoSe2/WSe2 Heterojunction-Based Photodetector at Telecommunication Wavelengths. In: Advanced Functional Materials. 2018 ; Vol. 28, No. 47.
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title = "A MoSe2/WSe2 Heterojunction-Based Photodetector at Telecommunication Wavelengths",
abstract = "van der Waals (vdW) heterojunctions enable arbitrary combinations of different layered semiconductors with unique band structures, offering distinctive band engineering for photonic and optoelectronic devices with new functionalities and superior performance. Here, an interlayer photoresponse of a few-layer MoSe2/WSe2 vdW heterojunction is reported. With proper electrical gating and bias, the heterojunction exhibits high-sensitivity photodetection with the operation wavelength extended up to the telecommunication band (i.e. 1550 nm). The photoresponsivity and normalized photocurrent-to-dark current ratio reach up to 127 mA W−1 and 1.9 × 104 mW−1, respectively. The results not only provide a promising solution to realize high-performance vdW telecommunication band photodetectors, but also pave the way for using sub-bandgap engineering of two-dimensional layered materials for photonic and optoelectronic applications.",
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author = "Hui Xue and Yadong Wang and Yunyun Dai and Wonjae Kim and Henri Jussila and Mei Qi and Jannatul Susoma and Zhaoyu Ren and Qing Dai and Jianlin Zhao and Kari Halonen and Harri Lipsanen and Xiaomu Wang and Xuetao Gan and Zhipei Sun",
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Xue, H, Wang, Y, Dai, Y, Kim, W, Jussila, H, Qi, M, Susoma, J, Ren, Z, Dai, Q, Zhao, J, Halonen, K, Lipsanen, H, Wang, X, Gan, X & Sun, Z 2018, 'A MoSe2/WSe2 Heterojunction-Based Photodetector at Telecommunication Wavelengths', Advanced Functional Materials, vol. 28, no. 47, 1804388. https://doi.org/10.1002/adfm.201804388

A MoSe2/WSe2 Heterojunction-Based Photodetector at Telecommunication Wavelengths. / Xue, Hui (Corresponding Author); Wang, Yadong; Dai, Yunyun; Kim, Wonjae; Jussila, Henri; Qi, Mei; Susoma, Jannatul; Ren, Zhaoyu; Dai, Qing; Zhao, Jianlin; Halonen, Kari; Lipsanen, Harri; Wang, Xiaomu; Gan, Xuetao; Sun, Zhipei.

In: Advanced Functional Materials, Vol. 28, No. 47, 1804388, 21.11.2018.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - A MoSe2/WSe2 Heterojunction-Based Photodetector at Telecommunication Wavelengths

AU - Xue, Hui

AU - Wang, Yadong

AU - Dai, Yunyun

AU - Kim, Wonjae

AU - Jussila, Henri

AU - Qi, Mei

AU - Susoma, Jannatul

AU - Ren, Zhaoyu

AU - Dai, Qing

AU - Zhao, Jianlin

AU - Halonen, Kari

AU - Lipsanen, Harri

AU - Wang, Xiaomu

AU - Gan, Xuetao

AU - Sun, Zhipei

PY - 2018/11/21

Y1 - 2018/11/21

N2 - van der Waals (vdW) heterojunctions enable arbitrary combinations of different layered semiconductors with unique band structures, offering distinctive band engineering for photonic and optoelectronic devices with new functionalities and superior performance. Here, an interlayer photoresponse of a few-layer MoSe2/WSe2 vdW heterojunction is reported. With proper electrical gating and bias, the heterojunction exhibits high-sensitivity photodetection with the operation wavelength extended up to the telecommunication band (i.e. 1550 nm). The photoresponsivity and normalized photocurrent-to-dark current ratio reach up to 127 mA W−1 and 1.9 × 104 mW−1, respectively. The results not only provide a promising solution to realize high-performance vdW telecommunication band photodetectors, but also pave the way for using sub-bandgap engineering of two-dimensional layered materials for photonic and optoelectronic applications.

AB - van der Waals (vdW) heterojunctions enable arbitrary combinations of different layered semiconductors with unique band structures, offering distinctive band engineering for photonic and optoelectronic devices with new functionalities and superior performance. Here, an interlayer photoresponse of a few-layer MoSe2/WSe2 vdW heterojunction is reported. With proper electrical gating and bias, the heterojunction exhibits high-sensitivity photodetection with the operation wavelength extended up to the telecommunication band (i.e. 1550 nm). The photoresponsivity and normalized photocurrent-to-dark current ratio reach up to 127 mA W−1 and 1.9 × 104 mW−1, respectively. The results not only provide a promising solution to realize high-performance vdW telecommunication band photodetectors, but also pave the way for using sub-bandgap engineering of two-dimensional layered materials for photonic and optoelectronic applications.

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