Highly fluorescence-stable blue CdZnS/ZnS quantum dots against degradable environmental conditions
- Authors
- Lee, Ki-Heon; Lee, Jeong-Hoon; Kang, Hee-Don; Han, Chang-Yeol; Bae, Seung Muk; Lee, Yangjin; Hwang, Jun Yeon; Yang, Heesun
- Issue Date
- 15-Oct-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Blue CdZnS/ZnS; Quantum dots; Quantum yield; Fluorescent stability; Thick ZnS shell
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.610, pp.511 - 516
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 610
- Start Page
- 511
- End Page
- 516
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/16552
- DOI
- 10.1016/j.jallcom.2014.05.052
- ISSN
- 0925-8388
- Abstract
- We report on synthesis of highly efficient, color-pure blue CdZnS/ZnS quantum dots (QDs) and their excellent fluorescent stability against degradable environmental conditions. The CdZnS/ZnS QDs finely emission-tunable in the range of 440-461 nm exhibit high photoluminescence (PL) quantum yields (QYs) of 81-92% along with an exceptionally narrow spectral bandwidth of 19 nm. These QDs are subjected to various post-treatments of a thorough purification cycle, long-term UV illumination, and hydrophobic-to-hydrophilic ligand exchange, each of which is usually detrimental to QD fluorescence. As a result, no noticeable deterioration in the fluorescent properties is observed, indicative of the insensitiveness of our CdZnS/ZnS QDs to the above degradable processes. Furthermore, PL properties of a solid film of multiple QD layers are assessed and compared with those of a diluted QD solution, showing an unprecedentedly small QY reduction of solid QD film versus QD solution. The above promising results are justified mainly by emphasizing the role of a thick ZnS shell present in CdZnS/ZnS QDs. (C) 2014 Elsevier B.V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Materials Science and Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/16552)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.