Yellow lighting upconversion from Yb3+/Ho3+ co-doped CaMoO4 |
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| Authors: | Jun Ho Chung Jeong Ho Ryu Sang Yeop Lee Jeong Hoon Lee Bong Geun Choi Kwang Bo Shim |
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| Affiliation: | 1. Department of Materials Science and Engineering, Hanyang University, 17 Haengdang-dong Seongdong-gu, Seoul 133-791, South Korea;2. Department of Materials Science and Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju-si, Chungbuk 380-702, South Korea;1. Coherent Light and Atomic and Molecular Spectroscopy Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, China;2. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;3. School of Media and Mathematics & Physics, Jilin Engineering Normal University, Changchun 130012, China;1. Institute of Technical Sciences of SASA, K. Mihailova 35/IV, Belgrade, Serbia;2. Vinca Institute of Nuclear Science, University of Belgrade, Belgrade, Serbia;3. Pontificia Universidade Católica do Rio de Janeiro – PUC Rio, Departamento de Engenharia de Materiais, Rio de Janeiro, RJ, Brazil;1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, China;2. Yili Normal University, Electronic and Information Engineering, Yining, Xinjiang 835000, China |
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| Abstract: | Yellow upconversion (UC) luminescence is observed in Ho3+/Yb3+ co-doped CaMoO4 synthesized by complex citrate-gel method. Under 980 nm excitation, Ho3+/Yb3+ co-doped CaMoO4 exhibited yellow emission based on green emission near 543 nm generated by 4F4, 5S2 → 5I8 transition and strong red emission around 656 nm generated by 5F5 → 5I8 transition, which are assigned to the intra 4f transitions of Ho3+ ions. The optimum doping concentration of Ho3+ and Yb3+ was investigated for highest upconversion luminescence. Based on pump power dependence, upconversion mechanism of Ho3+/Yb3+ co-doped CaMoO4 was studied in detail. |
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