Warm with high color rendering index white light from hybridization of Ca2BO3Cl:Eu2+ yellow phosphor and CdSe/ZnS nanocrystals |
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| Affiliation: | 1. Department of Physics, RTM Nagpur University, Nagpur 440033, India;2. N.H. College, Bramhapuri, Gondwana University, Gadchiroli 441206, India;1. School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;2. Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004, China;3. Department of Physics and Interdisciplinary Program of Biomedical, Mechanical & Electrical Engineering, Pukyong National University, Busan 608-737, Republic of Korea;1. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China;2. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;1. Engineering Research Center of Advanced Glasses Manufacturing Technology, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China;2. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China;1. Institute of Physical Chemistry, School of Chemistry Science & Technology, Zhanjiang Normal University, Zhanjiang 524048, China;2. MOE Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China;3. Beijing Synchrotron Radiation Facilities, Institute of High Energy Physics, Chinese Academy of Science, Beijing 100039, China |
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| Abstract: | Yellow emitting Ca2BO3Cl:Eu2+ phosphor was prepared by solid state reaction at 900 °C. The particle was monoclinic crystal structure, and showed broad band emission at around 540–590 nm due to the 5d–4f transition. Single Ca2BO3Cl:Eu2+ phosphor converted white LED exhibited the CIE coordinates of (0.3441, 0.2675) with low CRI of 67.4. Hybridization of Ca2BO3Cl:Eu2+ with 535 and 610 nm emitting CdSe/ZnS nanocrystals contributed to increasing white spectrum and generated the warm color temperature (4055 K) with high CRI (83.9) of white light. The acceptable color stability was also observed from (0.3687, 0.3051) at 20 mA to (0.3645, 0.3101) at 80 mA. |
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