Color-conversion and photoluminescence properties of Ba2MgW(Mo)O6:Eu phosphor |
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Authors: | Huaiyong LiHyun Kyoung Yang Byung Kee MoonByung Chun Choi Jung Hyun Jeong Kiwan JangHo Sueb Lee Soung Soo Yi |
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Affiliation: | a Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea b Department of Physics, Changwon National University, Changwon 641-773, Republic of Korea c Department of Electronic Material Engineering, Silla University, Busan 617-736, Republic of Korea |
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Abstract: | Compounds B2AXO6:Eu (B = Ba, Sr; A = Ca; and X = W, Mo) have recently been investigated and suggested to be color-conversion phosphor for WLED devices. In this work, we investigated the photoluminescence properties of the analogues Ba2MgXO6:Eu (X = W and Mo) and the energy transfer from W(Mo)O6 groups to Eu3+ ions within the phosphors. The phase structure, UV-vis diffuse reflectance spectrum, photoluminescence properties and decay of Ba2MgW(1−x)MoxO6:Eu were studied as a function of the W/Mo ratio. It was found that these phosphors showed excellent color-conversion capability from near-UV to orange-red light. The color-conversion process was considered to be performed by energy transferring from MoO6 groups to doped Eu3+ ions. The MoO6 → Eu3+ energy transfer efficiency could be greatly enhanced by partial substitution of Mo by W. The structure and photoluminescence properties of Ba2AW0.5Mo0.5O6:Eu (A = Ca and Mg, respectively) compounds were also investigated to reveal the effect of the Eu3+ ion coordination environment on its photoluminescence properties. |
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Keywords: | Phosphors Inorganic materials Optical properties Luminescence |
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