Single phase multi color emitting Ca2LuTaO6: Dy3+/Eu3+ double perovskite oxide phosphors |
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Authors: | Noor Zamin Khan Sayed Ali Khan Muhammad Sohail M A Majeed Khan Jahangeer Ahmed Li Zhan Feihong Wang Muhammad Tahir Abbas Xin Xu |
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Affiliation: | 1. CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, PR China;2. School of Electronic Science and Engineering, Xiamen University, Xiamen, PR China;3. International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province, Shenzhen University, Shenzhen, China;4. King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia;5. Department of Chemistry, Collage of Science, King Saud University, Riyadh, Saudi Arabia;6. Key Laboratory of Strongly Coupled Quantum Matter Physics, School of Physical Sciences, University of Science and Technology of China, Hefei, PR China |
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Abstract: | The trivalent rare-earth (RE3+) doped phosphors show tremendous achievement in narrow band multicolor line emission for various applications. However, the 4f–4f absorption transition of these ions is forbidden in UV and blue light excitation. Usually, a sensitizer having spin allowed transition was used as a co-dopant to excite these ions via the energy transfer phenomenon. Another approach promisingly using to excite these ions by efficient energy transfer from the intrinsic emission of the Ca2LuTaO6 double perovskite phosphors host lattice. Phosphors of Ca2LuTaO6 with double perovskite structure were synthesized by using a high-temperature solid-state reaction method. The produced Ca2LuTaO6 double perovskite phosphors show an intrinsic broad band emission centered at 424 nm under the excitation of 313 nm UV light. The origin of this broad band blue emission was deeply investigated by using computation and experimental approaches. The trivalent activator Dy3+ and Eu3+ were doped is a single and co-dopant in the produced Ca2LuTaO6 phosphors to check their excitation in UV and near-UV spectral region. X-ray diffraction and scanning electron microscopy were used to investigate the structure and phase analysis. Various characterizations such as photoluminescence excitation, emission, and CIE chromaticity coordinates were measured which illustrate the potential of Dy3+ and Eu3+ activated Ca2LuTaO6 double perovskite phosphors for narrow band multicolor line emission for various applications. |
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Keywords: | color coordinates high thermal stability line emission multicolor emission phosphors solid state lighting |
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