2020年
Critical Review - Photostable Fluorescent Cd-Free Quantum Dots Transparently Embedded in Monolithic Silica
ECS Journal of Solid State Science and Technology
- ,
- 巻
- 9
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1149/2.0062001JSS
- 出版者・発行元
- ECS Journal of Solid State Science and Technology
© The Author(s) 2019. Published by ECS.. Fluorescent Cd-free quantum dots (QDs) such as InP/ZnS and CuInS2/ZnS have attracted attention for use as color converters for blue light emitting diodes. To protect QDs from oxygen, which degrades them by photo-oxidation during excitation, we fabricated a transparent monolithic silica composite containing the QDs using an aqueous solution of tetramethylammonium silicate (TMAS) as a silica source. The TMAS solution readily dispersed the negatively charged QDs prepared by ligand exchange of 1-dodecanethiol for 3-mercatopropionic acid (MPA). A highly transparent monolithic TMAS-derived silica composite containing the MPA-capped QDs was obtained from the QD dispersion through a sol-gel process. Improved photostability of QDs was explained by the TMAS-derived silica acting as a gas barrier to protect the embedded QDs from photo-oxidation by oxygen in air.
- リンク情報
- ID情報
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- DOI : 10.1149/2.0062001JSS
- ISSN : 2162-8769