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Crystallinity and morphology dependent luminescence of Li-doped Y2−xGdxO3:Eu thin film phosphors |
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| Authors: | Jong Seong Bae Kyoo Sung Shim Soung-soo Yi Young Soo Kim |
| Affiliation: | a Basic Science Research Institute, Pukyong National University, Busan 608-737, Republic of Korea b Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea c Department of Photonics, Silla University, Busan 617-736, Republic of Korea d Department of Physics, Dongeui University, Busan 614-714, Republic of Korea e School of Mechanical Engineering, Pukyong National University, Busan 608-737, Republic of Korea f Department of Physics, Kyungsung University, Busan 608-736, Republic of Korea |
| Abstract: | The influence of lithium doping on the crystallization, the surface morphology, and the luminescent properties of pulsed laser deposited Y2−xGdxO3:Eu3+ thin film phosphors was investigated. The crystallinity, the surface morphology, and the photoluminescence (PL) of films depended highly on the Li-doping and the Gd content. The relationship between the crystalline and morphological structures and the luminescent properties was studied, and Li+ doping was found to effectively enhance not only the crystallinity but also the luminescent brightness of Y2−xGdxO3:Eu3+ thin films. In particular, the incorporation of Li and Gd into the Y2O3 lattice could induce remarkable increase in the PL. The highest emission intensity was observed Li-doped Y1.35Gd0.6O3:Eu3+ thin films whose brightness was increased by a factor of 4.6 in comparison with that of Li-doped Y2O3:Eu3+ thin films. |
| Keywords: | 78.20.&minus e 78.55.&minus m 78.66.&minus w |
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