Abstract
Asymmetric contacts were used to assemble extremely photosensitive and self-powered photodetectors (SPDs) on rigid and polyimide (PI) substrates based on one-dimensional (1D)-CdS nanobelts.
Highlights
Flexible photodetectors have recently gained more attention due to their wide range of applications including motion detection, optical communications, sensing, biomedical imaging and missile warning.[1,2] A key requirement in the optimal design of such flexible photodetectors is the power consumption
All of the detected peaks can be attributed to hexagonal wurtzite Cadmium sulfide (CdS) with lattice parameters of a = 4.14 Å and c = 6.72 Å, in good agreement with JCPDS card No 41-1049
The hexagonal wurtzite CdS belongs to the C46v(p63mc) space group and may exhibit the lattice vibrational modes Gopt = A1 + 2B1 + E1 + 2E2
Summary
Flexible photodetectors have recently gained more attention due to their wide range of applications including motion detection, optical communications, sensing, biomedical imaging and missile warning.[1,2] A key requirement in the optimal design of such flexible photodetectors is the power consumption. The device exhibited an ultra-low dark current of 36 fA, which lead to a high photosensitivity of 1.54 Â 106%, high responsivity of 36 mA WÀ1, specific detectivity of 2.36 Â 1012 Jones, and noise equivalent power of 2.94 Â 10À15 W HzÀ1/2 under 215 mW cmÀ2 light irradiation.
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