期刊
APPLIED SURFACE SCIENCE
卷 570, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.151185
关键词
Photoconductivity; Polyimide; Hybridized bond; Electron beam; Flexible photodetector
类别
资金
- Basic Science Research Program of the National Research Foundation (NRF) of Korea - Ministry of Science and ICT [NRF-2017R1D1A1B03032923]
- Business Support R&D Program - Korea Institute of Ceramic Engineering and Technology [KCS2003-1]
This study implemented an optoelectronic device comprising only PI, optimizing its photocharacteristics through electron-beam irradiation treatment to achieve higher light absorption and conductive properties. The PI photodetector exhibited a detectivity of 6.38 x 1010 Jones under laser illumination and maintained stability in mechanical characteristics through cyclic bending tests.
Despite the insulating properties of polyimide (PI), this study implemented an optoelectronic device comprising only PI. To realize suitable photocharacteristics of the PI photodetector, the PI-coated glass substrate was irradiated with an electron beam to transform the optical and electrical characteristics of PI from lower light absorption and insulation to relatively higher light absorption and conductive properties; the substrate was then removed. With the optimization of the electron-beam irradiation treatment conditions, detectivity of 6.38 x 1010 Jones was exhibited for the PI photodetector at 1 V under laser illumination at a wavelength of 450 nm. Furthermore, the mechanical characteristics of the free-standing PI photodetector under cyclic bending tests suggested a reduction of less than 25% after 1,000 cycles of bending. This demonstrates an innovative approach to the design of stable, flexible PI photodevices through elimination of a separate substrate.
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