Silica nanoparticles assisted preparation of reddish-yellow emitting Eu2+ activated remote-type CaSrSiO4 phosphor for warm white LED applications |
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| Affiliation: | 1. Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa;2. Department of Physics, R.T.M. Nagpur University, Nagpur, 440033, India;1. Department of Chemistry, Faculty of science AISECT University, Bhopal, India;2. Department of Physics, R. T. M. Nagpur University, Nagpur 440033, India;3. P.G. Department of Physics & Electronics, DAV College, Amritsar 143001, Punjab, India;1. School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;3. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;1. Department of Packaging Engineer, Henan University of Science and Technology, Luoyang 471023, China;2. Mathematics and Statistics School, Henan University of Science and Technology, Luoyang 471023, China |
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| Abstract: | ![]()
A reddish-yellow emitting silicate-based remote phosphor has been developed via the wet-solid phase reaction technique. By employing silica nanoparticles (200 nm), Eu2+ doped CaSrSiO4 phosphor was developed and its efficacy has been examined thoroughly. The developed remote phosphor can get excited over a broad region of the spectrum ranging from ultraviolet to blue (250–500 nm) and as generates a reddish-yellow emission peaked at 580 nm covering a broad range of spectral components (450–800 nm) with a quantum efficiency of 52%. The thermoluminescence studies of developed remote phosphor exhibit 50% of the stable emission up to 200 °C without any shift in the emission wavelength. The developed remote phosphor was then utilized for the making of a proto-type LED using 450 nm blue-emitting commercial LED. The output emission from the proto-type LED confirms the production of efficient warm white light with CCT <5000 K and CRI >85. |
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| Keywords: | Phosphor LED Warm white light Remote phosphor |
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