期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 3, 页码 4767-4774出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c22501
关键词
bioinspired compound eye; light harvesting; thermal reflow; photodetector; soft optics; soft lithography
资金
- National Science Foundation of China (NSFC) [61805179, 61905180]
- Major International Joint Research Project [61620106006]
- Science Foundation of Zhejiang [LY19F050013]
Inspired by natural compound eyes, a curved artificial-compound-eye (cACE) photodetector is proposed and fabricated to enhance light-harvesting capability. The fabricated photodetector exhibits desirable geometric shape and improved photocurrent output, making it suitable for luminance sensing.
Natural compound eyes endow arthropods with wide-field high-performance light-harvesting capability that enables them to capture prey and avoid natural enemies in dim light. Inspired by natural compound eyes, a curved artificial-compound-eye (cACE) photodetector for diffused light harvesting is proposed and fabricated, and its light-harvesting capability is systematically investigated. The cACE photodetector is fabricated by introducing a cACE as a light-harvesting layer on the surface of a silicon-based photodetector, with the cACE being prepared via planar artificial-compound-eye (pACE) template deformation. The distinctive geometric morphology of the as-prepared cACE effectively reduces its surface reflection and the dependence of the projected area on the incident light direction, thereby significantly improving the light-harvesting ability and output photocurrent of the silicon-based photodetector. Furthermore, the performances of cACE, pACE, and bare polydimethylsiloxane (PDMS)-attached photodetectors as diffused light detectors are investigated under different luminances. The cACE-photodetector output photocurrent is 1.395 and 1.29 times those of the bare PDMS-attached and pACE photodetectors, respectively. Moreover, this photodetector has a desirable geometric shape. Thus, the proposed cACE photodetector will facilitate development of high-performance photodetectors for luminance sensing.
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