Eco-friendly Emissive ZnO-graphene QD for bluish-white light-emitting diodes

Title
Eco-friendly Emissive ZnO-graphene QD for bluish-white light-emitting diodes
Authors
김홍희손동익황도경최원국
Issue Date
2013-02
Publisher
한국진공학회
Abstract
Recently, most studies concerning inorganic quantum dot (QD)-polymer hybrid LEDs have been concentrated on the structure with multiple layers and CdSe materials for color reproduction such as blue, green and red from the light source has been widely used. Cd(Cadmium) is one of the six substances banned by the Restriction on Hazardous Substances (RoHS) directive and classified into a hazardous substance for utilization and commercialization as well as for use in life, it was reported that the use of CdSe is not suitable to fabricate a Optoelectronic device. In this work, a novel, simple and facile technique is introduced for the synthesis of eco-friendly ZnO–graphene quasi-core–shell quantum dots utilizing graphene nanodot to overcome the toxic property of Cd. Also, we will report optical and structural properties of the hybrid quantum dots and the performance of LED. As one of results, the device produced bluish-white color of the maximum brightness 1118 cd/m2 with CIE coordinates (0.31, 0.26) at the bias 10 V.
URI
http://pubs.kist.re.kr/handle/201004/46997
Appears in Collections:
KIST Publication > Conference Paper
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