Design of a narrow-band blue-emitting Rb2Ba3(P2O7)2:Eu2+ phosphor with low thermal quenching for plant growth LEDs |
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| Affiliation: | 1. Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China;2. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China;1. Institute of Aeronautics and Space, São José dos Campos, SP, 12228-904, Brazil;2. Institute for Advanced Studies, São José dos Campos, SP, 12228-001, Brazil;1. Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam, 31441, Saudi Arabia;2. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam, 31441, Saudi Arabia;1. University of Electronic Science and Technology of China, School of Optoelectronic Science and Engineering, Chengdu, 610054, PR China;2. North University of China, School of Information and Communication Engineering, Taiyuan, 030000, PR China;3. SensView Technology (Chengdu) Co., Ltd., Chengdu, 610054, PR China;4. University of Electronic Science and Technology of China, School of Electronic Science and Engineering, Chengdu, 610054, PR China;1. College of Resources and Civil Engineering, Northeastern University, Shenyang, China;2. Science and Technology Innovation Center of Smart Water and Resource Environment, Northeastern University, Shenyang, 110819, China;3. School of Mathematics and Physical Sciences, University College London, London, WC1E 6BT, UK |
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| Abstract: | Phosphor-converted light-emitting diodes (pc-LEDs) are commonly used to regulate the light environment to control the growth rates and improve the production efficiency of plant. Among them, the exploration of blue-emitting phosphors with high efficiency, low thermal quenching and excellent spectrum resemblance matching with the plant response spectrum is still challenging. Herein, a narrow-band blue-emitting Rb2Ba3(P2O7)2:Eu2+ phosphor with high color purity of 93.4% has been developed. Under 345 nm excitation, it exhibits a blue emission band centered at 413 nm with a full width at half-maximum (FWHM) of 36 nm, and the emission spectrum of Rb2Ba3(P2O7)2:0.060Eu2+ sample shows 85.7% spectrum resemblance with the absorption spectrum of chlorophyll-a in the blue region from 400 to 500 nm. In addition, the temperature-dependent emission spectra demonstrate that the Rb2Ba3(P2O7)2:0.060Eu2+ phosphor has good thermal stability and small chromaticity shift, with the emission intensity dropping to 72.5% at 423 K of the initial intensity at 298 K and a chromaticity shift of 38 × 10-3 at 498 K. All results suggest that the blue-emitting Rb2Ba3(P2O7)2:Eu2+ phosphor has potential application in plant growth LEDs. |
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| Keywords: | Plant growth LEDs Phosphors Blue emission Thermal stability |
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