Journal
JOURNAL OF SEMICONDUCTORS
Volume 42, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-4926/42/3/032001
Keywords
ReSe2/WSe2; photodetector; polarization
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The study introduces a photodetector based on ReSe2/WSe2 materials, showing high responsivity and detectivity. The scanning photocurrent mapping demonstrates effective detection of polarized light.
Polarization-resolved photodetectors, a significant branch of photodetection, can more effectively distinguish the target from the background by exploiting polarization-sensitive characteristics. However, due to the absence of intrinsic polarized absorption properties of many materials, there is still a great challenge to develop the high-performance polarization-resolved photodetectors. Here, we report a van der Waals heterojunction (vdWH) ReSe2/WSe2 photodetector, which performs a high responsivity of similar to 0.28 A/W and a high detectivity of 1.1 x 10(12) Jones under the illumination of 520 nm laser at room temperature. Remarkably, scanning photocurrent mapping (SPCM) measurements demonstrate the photoresponse of devices closely depend on the polarized angle of the incident light, indicating the effective polarized light detection. This work paves the way to develop high-performance polarization-resolved photodetectors based on two-dimensional (2D) materials.
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