Electronic structure and luminescent properties of Ce3+-doped Ba3Lu2B6O15, a high-efficient blue-emitting phosphor
| Autor: | Xinguo Zhang, Tingting Zhang, Zhenpeng Zhu, Zichao Yang, Zhan-Chao Wu, Zishan Sun, Ziying Guo |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Rietveld refinement business.industry Process Chemistry and Technology Doping Phosphor 02 engineering and technology Electronic structure 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials 0103 physical sciences Materials Chemistry Ceramics and Composites Optoelectronics Density functional theory Quantum efficiency 0210 nano-technology Luminescence business Excitation |
| Zdroj: | Ceramics International. 45:7143-7150 |
| ISSN: | 0272-8842 |
| Popis: | A high-efficient blue-emitting phosphor Ba3Lu2B6O15: Ce3+ was synthesized by three-step solid-state method. XRD Rietveld refinement analysis reveals that Ba3Lu2B6O15 is of cubic Ia 3 ( — — ) system, owning a high-symmetric layer structure with two regular LuO6 octahedrons and one BaO9 polyhedron. Density functional theory (DFT) calculation result indicates BLB is a kind of direct band-gap material with broad band-gap of ~5.10 eV. Ba3Lu2B6O15:Ce3+ phosphor exhibits a bright blue emission under UV excitation with high quantum efficiency of > 90%, and the possible reasons are discussed basing on structural and spectral data. Because of its excellent luminescent properties, Ba3Lu2B6O15:Ce3+ could be a promising candidate as a blue phosphor for NUV LED devices. |
| Databáze: | OpenAIRE |
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