A Colloidal‐Quantum‐Dot‐Based Self‐Charging System via the Near‐Infrared Band

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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.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2018-06
Language
English
Citation

ADVANCED MATERIALS, v.30, no.25, pp.1707224

ISSN
0935-9648
DOI
10.1002/adma.201707224
URI
http://hdl.handle.net/10203/244909
Appears in Collection
EEW-Journal Papers(저널논문)
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