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
Article Type
Article
Citation

ADVANCED MATERIALS, v.30, no.25

ISSN
0935-9648
DOI
10.1002/adma.201707224
URI
http://hdl.handle.net/10203/244023
Appears in Collection
EEW-Journal Papers(저널논문)
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