In Situ Synthesis of Thiol-Capped CuInS2-ZnS Quantum Dots Embedded in Silica Powder by Sequential Ligand-Exchange and Silanization

Title
In Situ Synthesis of Thiol-Capped CuInS2-ZnS Quantum Dots Embedded in Silica Powder by Sequential Ligand-Exchange and Silanization
Authors
김현기장호성권병화서민원김영선정상훈전덕영
Keywords
quantum dots; white LEDs; luminescence
Issue Date
2012-02
Publisher
Electrochemical and solid-state letters
Citation
VOL 15, NO 2, K16-K18
Abstract
Thiol-capped CuInS2-ZnS core-shell quantum dot (QD) embedded in silica powder is synthesized by in situ approach, which contributes to facileness, high reproducibility andmass-productivity. The proposed method is distinguished in that it uses intermediate ligand-exchange step with hydroxyl-terminated ligands during growth stage, which helps the QDs to be dispersed in polar silane matrix to form micron-sized silica powder. This results in well-dispersed QDs in the silica powder with luminescence efficiency of 34%. In addition, the QDs/silica composites are applied to white-LEDs, demonstrating high quality white light with high color stability under various operating currents.
URI
http://pubs.kist.re.kr/handle/201004/41401
ISSN
1099-0062
Appears in Collections:
KIST Publication > Article
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