期刊
SURFACES AND INTERFACES
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.surfin.2022.102288
关键词
Ultra-flexible silicon; Light-trapping structure; Self-powered; Photodetectors
类别
资金
- National Natural Science Foundation of China [61774084]
- special fund of Jiangsu province for the transformation of scientific and technological achievements [BA2019047]
- Special Scientific Innovation Found of Sihong County [H201901]
- open project of Key Laboratory of Materials Preparation and Protection for Harsh Environment, Ministry of Industry and Information Technology [XCA20013-3]
Flexible substrates are widely used in Visible-NIR photodetectors. Light-trapping structures with different reflectivity were prepared through alkali etching. PEDOT: PSS films doped with DMSO exhibited the highest conductivity. PEDOT: PSS/UF-Si nanowire device prepared by spin-coating showed the best optoelectronic performance.
Flexible substrates have been widely used in Visible-NIR photodetectors in recent years. Flexible silicon wafers were prepared by alkali etching. Pyramids with reflectivity of 11.8%, inverted pyramid with reflectivity of 7.9% and nanowire with reflectivity of 1.9% light-trapping structures were prepared by low concentration alkali etching, one-step Cu-MACE and Ag-MACE, respectively. In addition, PEDOT: PSS films doped with 5 wt% DMSO successfully presented the highest conductivity of 580 S.cm(-1). The PEDOT: PSS/UF-Si PDs with different light-trapping structures were prepared by spin-coating PEDOT: PSS films. Comparing the optoelectronic performance of different light-trapping structures of the photodetector, the PEDOT: PSS/UF-Si NWs device exhibited the best optoelectronic performance. The photoresponse range is 300-1100 nm and the responsivity at the peak of 650 nm is 0.62 A.W-1. Furthermore, bending measurements are performed on PEDOT: PSS/UF-Si NWs PDs to evaluate the bending performance of the flexible PDs. For PEDOT: PSS/UF-Si NWs PDs with a bending radius of 5.3 mm and a bending cycle of 500, the responsitivity of the device demonstrates very small degradation.
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