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

Se Woong Baek; Jungmin Cho; Joo Seong Kim; Changjo Kim; Kwangmin Na; Sang Hoon Lee; Sunhong Jun; Jung Hoon Song; Sohee Jeong; Jang Wook Choi; Jung Yong Lee

doi:10.1002/adma.201707224

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

Se Woong Baek
, Jungmin Cho
, Joo Seong Kim
, Changjo Kim
, Kwangmin Na
, Sang Hoon Lee
, Sunhong Jun
, Jung Hoon Song
, Sohee Jeong
, Jang Wook Choi
, Jung Yong Lee

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

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.

Original language	English
Article number	1707224
Journal	Advanced Materials
Volume	30
Issue number	25
DOIs	https://doi.org/10.1002/adma.201707224
State	Published - 20 Jun 2018
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

colloidal quantum dots
flexible Li-ion batteries
near-infrared (NIR)
photostability
wearable electronics

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10.1002/adma.201707224

Cite this

@article{76c91c298239461786ce94b99ab150e6,

title = "A Colloidal-Quantum-Dot-Based Self-Charging System via the Near-Infrared Band",

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.",

keywords = "colloidal quantum dots, flexible Li-ion batteries, near-infrared (NIR), photostability, wearable electronics",

author = "Baek, \{Se Woong\} and Jungmin Cho and Kim, \{Joo Seong\} and Changjo Kim and Kwangmin Na and Lee, \{Sang Hoon\} and Sunhong Jun and Song, \{Jung Hoon\} and Sohee Jeong and Choi, \{Jang Wook\} and Lee, \{Jung Yong\}",

note = "Publisher Copyright: {\textcopyright} 2018 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2018",

month = jun,

day = "20",

doi = "10.1002/adma.201707224",

language = "English",

volume = "30",

journal = "Advanced Materials",

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AU - Baek, Se Woong

AU - Cho, Jungmin

AU - Kim, Joo Seong

AU - Kim, Changjo

AU - Na, Kwangmin

AU - Lee, Sang Hoon

AU - Jun, Sunhong

AU - Song, Jung Hoon

AU - Jeong, Sohee

AU - Choi, Jang Wook

AU - Lee, Jung Yong

PY - 2018/6/20

Y1 - 2018/6/20

N2 - 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.

AB - 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.

KW - colloidal quantum dots

KW - flexible Li-ion batteries

KW - near-infrared (NIR)

KW - photostability

KW - wearable electronics

UR - https://www.scopus.com/pages/publications/85046746199

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JF - Advanced Materials

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ER -

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

Abstract

UN SDGs

Keywords

Access to Document

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