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나노입자 연구단
나노입자 연구단
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Fully Stretchable Optoelectronic Sensors Based on Colloidal Quantum Dots for Sensing Photoplethysmographic Signals

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Title
Fully Stretchable Optoelectronic Sensors Based on Colloidal Quantum Dots for Sensing Photoplethysmographic Signals
Author(s)
Tae-Ho Kim; Chang-Seok Lee; Sangwon Kim; Jaehyun Hur; Sangmin Lee; Keun Wook Shin; Young-Zoon Yoon; Moon Kee Choi; Jiwoong Yang; Dae-Hyeong Kim; Taeghwan Hyeon; Seongjun Park; Sungwoo Hwang
Publication Date
2017-06
Journal
ACS Nano, v.11, no.6, pp.5992 - 6003
Publisher
AMER CHEMICAL SOC
Abstract
Flexible and stretchable optoelectronic devices can be potentially applied in displays, biosensors, biomedicine, robotics, and energy generation. The use of nanomaterials with superior optical properties such as quantum dots (QDs) is important in the realization of wearable displays and biomedical devices, but specific structural design as well as selection of materials should preferentially accompany this technology to realize stretchable forms of these devices. Here, we report stretchable optoelectronic sensors manufactured using colloidal QDs and integrated with elastomeric substrates, whose optoelectronic properties are stable under various deformations. A graphene electrode is adopted to ensure extreme bendability of the devices. Ultrathin QD light-emitting diodes and QD photodetectors are transfer-printed onto a prestrained elastomeric layout to form wavy configurations with regular patterns. The layout is mechanically stretchable until the structure is converted to a flat configuration. The emissive and active area itself can be stretched or compressed by buckled structures, which are applicable to wearable electronic devices. We demonstrate that these stretchable optoelectronic sensors can be used for continuous monitoring of blood waves via photoplethysmography signal recording. These and related systems create important and unconventional opportunities for stretchable and foldable optoelectronic devices with health-monitoring capability and, thus, meet the demand for wearable and body-integrated electronics. © 2017 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4176
ISSN
1936-0851
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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