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High responsivity and high-speed 1.55 μm infrared photodetector from self-powered graphene/Si heterojunction.
- Source :
-
Sensors & Actuators A: Physical . Jun2019, Vol. 291, p87-92. 6p. - Publication Year :
- 2019
-
Abstract
- Graphical abstract A self-powered Gr/Si heterojunction was successfully fabricated by using graphene film as active area. The device exhibits a responsivity approaching 39.5 mAW−1, together with a high-speed response speed up to 5.0 μs to communication wavelength of 1.55 μm. Highlights • A self-powered Gr/Si heterojunciton photodetector was fabricated by using graphene as the active area. • The Gr/Si heterojunciton photodetector shows an excellent rectification behavior and a sensitivity to 1.55 μm IR light. • High responsivity and high speed of the Gr/Si heterojunction were achieved. • The device performance are superior to most of previous graphene-based photodetectors. Abstract Graphene has shown great potentials for new-generation photodetectors in view of its outstanding optical and electrical properties, especially its ultra-broad range absorption. Most of graphene(Gr)/Si hybrid two-dimensional(2D)-three-dimensional(3D) photodetectors, which offer a perspective on future application in integrated optoelectronics, are still however enabled the excellent detection on visible light. Herein, we reported a self-powered Gr/Si Schottky heterojunciton with a high sensivity to communication light of 1.55 μm wavelenght by using graphene film as active area. The resultant photodetectors showed a high-speed response speed up to 5.0 μs, togther with a responsivity approaching 39.5 mAW−1, which are comparable with previous graphene-based photodetectors and superior to previous Gr/Si heterojunction. The high-performance of the schottky heterojunction can be ascribed to featuring a built-in field facilitating to separate photocarriers. Combined our results with the methodology of devcie fabrication, can be utilized as pathway for large-area integration of 1.55 μm communication light photodetectors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09244247
- Volume :
- 291
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators A: Physical
- Publication Type :
- Academic Journal
- Accession number :
- 135977340
- Full Text :
- https://doi.org/10.1016/j.sna.2019.03.054