Luminescent mechanism of Eu3+-doped epitaxial Gd2O3 films grown on a Si (111) substrate using an effusion cell
- Authors
- Jang, Moon Hyung; Choi, Yoon Ki; Chung, Kwun Bum; Jeon, Hyeongtag; Cho, Mann-Ho
- Issue Date
- Jul-2011
- Publisher
- ELSEVIER
- Keywords
- Rare-earth phosphor; Gd2O3:Eu3+; Luminescent mechanism
- Citation
- CURRENT APPLIED PHYSICS, v.11, no.4, pp.1001 - 1005
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 11
- Number
- 4
- Start Page
- 1001
- End Page
- 1005
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168032
- DOI
- 10.1016/j.cap.2011.01.010
- ISSN
- 1567-1739
- Abstract
- Eu3+-doped epitaxial Gd2O3 ( 111) films with well-ordered crystalline structures were grown on oxidized Si ( 111) using the physical vapor deposition method. The mole fraction ( x) of Eu3+ in Gd2-xO3:Eu-x(3+) ranged from 0.02 to 0.22. The photoluminescence characteristics, measured at an excitation wavelength of 254 nm, showed that even at the very low Eu3+ concentration, x = 0.18, the D-5(0) -> F-7(2) transition occurred at the maximum 612-nm emission. Based on the critical distance calculated using the decay curves at 612 nm, we proved that the D-5(0) -> F-7(2) transition of the Gd2O3:Eu3+ originated from an electric dipole-dipole transition. In addition, the critical distance (R-c) was greater than that reported previously due to the perfectly crystalline film. This significantly decreases the mole fraction which maximize the photoluminescence intensity because the non-radiative transition is much lower than that of the chemically synthesized Gd2O3:Eu3+.
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