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Quantum Dot-Block Copolymer Hybrids with Improved Properties and Their Application to Quantum Dot Light-Emitting Devices

Cited 122 time in Web of Science Cited 127 time in Scopus
Authors

Zorn, Matthias; Bae, Wan Ki; Kwak, Jeonghun; Lee, Hyemin; Lee, Changhee; Zentel, Rudolf; Char, Kookheon

Issue Date
2009-04-29
Publisher
American Chemical Society
Citation
ACS Nano 2009, 3, 1063
Keywords
hybrid materialsquantum dot(s)light-emitting device(s)
Abstract
To combine the optical properties of CdSe@ZnS quantum dots (QDs) with the electrical properties of semiconducting polymers, we prepared QD/polymer hybrids by grafting a block copolymer (BCP) containing thiol-anchoring moieties (poly(para-methyl triphenylamine-b-cysteamine acrylamide)) onto the surfaces of QDs through the ligand exchange procedure. The prepared QD/polymer hybrids possess improved processability such as enhanced solubility in various organic solvents as well as the film formation properties along with the improved colloidal stability derived from the grafted polymer shells. We also demonstrated light-emitting diodes based on QD/polymer hybrids, exhibiting the improved device performance (i.e., 3-fold increase in the external quantum efficiency) compared with the devices prepared by pristine (unmodified) QDs.
ISSN
1936-0851
Language
English
URI
https://hdl.handle.net/10371/5656
DOI
https://doi.org/10.1021/nn800790s
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