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A colloidal-quantum-dot-based self-charging system via the near-infrared band

Cited 8 time in Web of Science Cited 8 time in Scopus
Authors
Baek, Se-Woong; Cho, Jungmin; Kim, Joo-Seong; Kim, Changjo; Na, Kwangmin; Lee, Sang-Hoon; Jun, Sunhong; Song, Jung Hoon; Jeong, Sohee; Choi, Jang Wook; Lee, Jung-Yong
Issue Date
2018-06
Citation
Advanced Materials, Vol.30 No.25, p. 1707224
Keywords
colloidal quantum dotsflexible Li-ion batteriesnear-infrared (NIR)photostabilitywearable electronics
Abstract
A novel self-charging platform is proposed using colloidal-quantum-dot (CQD) photovoltaics (PVs) via the near-infrared (NIR) band for low-power electronics. Low-bandgap CQDs can convert invisible NIR light sources to electrical energy more efficiently than wider spectra because of reduced thermalization loss. This energy-conversion strategy via NIR photons ensures an enhanced photostability of the CQD devices. Furthermore, the NIR wireless charging system can be concealed using various colored and NIR-transparent fabric or films, providing aesthetic freedom. Finally, an NIR-driven wireless charging system is demonstrated for a wearable healthcare bracelet by integrating a CQD PVs receiver with a flexible lithium-ion battery and entirely embedding them into a flexible strap, enabling permanent self-charging without detachment.
ISSN
0935-9648
URI
https://hdl.handle.net/10371/164679
DOI
https://doi.org/10.1002/adma.201707224
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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