期刊
CHINESE PHYSICS B
卷 32, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1056/ac9049
关键词
two-dimensional material; ambipolar semiconductor; field-effect transistor; optoelectronic device
A field-effect WSe2/Si heterojunction diode based on ambipolar 2D WSe2 and silicon on insulator (SOI) are reported in this paper. The device exhibits p-n diode behavior with a rectifying ratio of about 300 and an ideality factor of 1.37. As a photodetector, it has optoelectronic properties with a response time of 0.13 ms, responsivity of 0.045 A/W, detectivity of 4.5x10(10) Jones, and external quantum efficiency (EQE) of 8.9%. The rectifying and optoelectronic properties of the heterojunction diode can be modulated by the gate electrical field due to the ambipolar behavior of the WSe2.
It is significant to develop a heterogeneous integration technology to promote the application of two-dimensional (2D) materials in silicon roadmap. In this paper, we reported a field-effect WSe2/Si heterojunction diode based on ambipolar 2D WSe2 and silicon on insulator (SOI). Our results indicate that the device exhibits a p-n diode behavior with a rectifying ratio of similar to 300 and an ideality factor of 1.37. As a photodetector, it has optoelectronic properties with a response time of 0.13 ms, responsivity of 0.045 A/W, detectivity of 4.5x10(10) Jones and external quantum efficiency (EQE) of 8.9 %. Due to the ambipolar behavior of the WSe2, the rectifying and optoelectronic properties of the heterojunction diode can be modulated by the gate electrical field, enabling various potential applications such as logic optoelectronic devices and neuromorphic optoelectronic devices for in-sensor computing circuits. Thanks to the process based on the mature SOI technique, our field-effect heterojunction diode should have obvious advantages in device isolation and integration.
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