Yolk- shell structured Gd2O3: Eu3+ phosphor prepared by spray pyrolysis: the effect of preparation conditions on microstructure and luminescence properties
- Authors
- Cho, Jung Sang; Jung, Kyeong Youl; Kang, Yun Chan
- Issue Date
- 2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.17, no.2, pp.1325 - 1331
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS
- Volume
- 17
- Number
- 2
- Start Page
- 1325
- End Page
- 1331
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/96352
- DOI
- 10.1039/c4cp03477e
- ISSN
- 1463-9076
- Abstract
- Gd2O3: Eu3+ yolk-shell phosphor powders with high photoluminescence intensity were prepared by spray pyrolysis. Preparation temperature and spray solution concentration were varied to find the optimum process conditions for preparation of Gd2O3: Eu3+ with yolk-shell structure. The formation mechanism of yolk-shell Gd2O3: Eu3+ was systematically investigated by observing the microstructures of particles produced under various preparation conditions. The morphological structure of Gd2O3: Eu3+ powders was clearly dependent on reactor temperature and on the precursor solution concentration. Eventually, pure yolk-shell structured Gd2O3: Eu3+ powders were obtained for a reaction temperature of 1000 degrees C and concentration of the spray solution below 0.2 M. Also, the yolk-shell structure formed showed high thermal stability, making it possible to maintain the original spherical yolk- shell structure through calcination at high temperatures. As a result, highly crystalline Gd2O3: Eu3+ phosphor powders having yolk-shell structure and an agglomeration-free spherical shape were successfully synthesized by spray pyrolysis. These phosphor powders were shown to have good photoluminescence characteristics.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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