A biomimetic compound eye lens for photocurrent enhancement at low temperatures
- Authors
- Han, Sanghu; Sung, Jaebum; Ko, Byeongjo; Kwon, Minjun; Kim, Sewon; So, Hongyun
- Issue Date
- Jul-2022
- Publisher
- IOP PUBLISHING LTD
- Keywords
- artificial compound eye lens; laser cutting; polyvinyl alcohol; photodetector; low temperature
- Citation
- BIOINSPIRATION & BIOMIMETICS, v.17, no.4, pp.1 - 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIOINSPIRATION & BIOMIMETICS
- Volume
- 17
- Number
- 4
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/170042
- DOI
- 10.1088/1748-3190/ac6c65
- ISSN
- 1748-3182
- Abstract
- In this study, an artificial compound eye lens (ACEL) was fabricated using a laser cutting machine and polyvinyl alcohol (PVA) solution. A laser cutter was used to punch micro-sized holes (500 mu m diameter-the smallest possible diameter) into an acrylic plate; this punched plate was then placed on the aqueous PVA solution, and the water was evaporated. The plate was used as the mold to obtain a polydimethylsiloxane (PDMS) micro lens array film, which was fixed to a dome-shaped three-dimensional-printed mold for further PDMS curing, and a hemispherical compound eye lens was obtained. Using a gallium nitride (GaN) photodetector, a light detection experiment was performed with the ACEL, bare lens, and no lens by irradiating light at various angles under low temperatures. The photodetector with the ACEL generated a high photocurrent under several conditions. In particular, when the light was irradiated at 0 degrees and below -20 degrees C, the photocurrent of the GaN sensor with the ACEL increased by 61% and 81% compared with the photocurrent of the GaN sensor with the bare lens and without a lens, respectively. In this study, a sensor for detecting light with ACEL was demonstrated in low-temperature environments, such as indoor refrigerated storages and external conditions in Antarctica and Arctic.
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