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Kwon, Tae-Hyuk
Energy Recognition
Research Interests
  • Energy transfer, organic solar cells, supercapacitor, ultrasonic spray chemistry, dithienothiophene, iridium complexes, phosphorescent bioapplications

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Indoor-light-energy-harvesting dye-sensitized photo-rechargeable battery

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Title
Indoor-light-energy-harvesting dye-sensitized photo-rechargeable battery
Author
Kim, Byung-ManLee, Myeong-HeeDilimon Vijayan SobhanaKim, Jeong SooNam, Jung SeungCho, Yoon-GyoNoh, Hyun KukROh, Deok-HoKwon, Tae-HyukSong, Hyun-Kon
Issue Date
2019-12
Publisher
Royal Society of Chemistry
Citation
ENERGY & ENVIRONMENTAL SCIENCE
Abstract
Photo-rechargeable batteries (PRBs) benefit from their bifunctionality covering energy harvesting and storage. However, dim-light performances of the PRBs for indoor applications have not been reported. Herein, we present an external-power-free single-structured PRB named a dye-sensitized photo-rechargeable battery (DSPB) with an outstanding light-to-charge energy efficiency (ηoverall) of 11.5% under the dim light condition. This unprecedented ηoverall was attributed to the thermodynamically-favorable design of the DSPB that maximizes the working potential. At high-power irradiation, the kinetically-fast but thermodynamically-unfavorable iodine mediator (I−/I3−) showed the highest charge and discharge capacities even if its discharge voltage was lowest. Under dim-light for indoor applications, however, the thermodynamically-favorable but kinetically-slow copper complex mediator (Cu+/2+(dmp)2) showed energy density and efficiency superior to I−/I3− because its kinetics did not limit the harvesting capacity. The successful demonstration of the ability of the DSPB to operate a temperature-sensing IoT device only by indoor light opens the possibility of realizing indoor-light-harvesting PRBs.
URI
https://scholarworks.unist.ac.kr/handle/201301/30701
URL
https://pubs.rsc.org/en/content/articlelanding/2020/ee/c9ee03245b#!divAbstract
DOI
10.1039/C9EE03245B
ISSN
1754-5692
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