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2017•Journal of the Chinese Institute of EngineersRequires access

Red-emitting α-SrO·3B 2 O 3 :Sm 2+ phosphor: an innovative application for increasing color quality and luminous flux of remote phosphor white LEDs

Tran Hoang Quang Minh, Nguyen Huu Khanh Nhan, Nguyễn Đoàn Quốc Anh, Hsiao-Yi Lee

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Abstract

By adding red-emitting α-SrO·3B2O3:Sm2+ phosphor and SiO2 co-doping particles to yellow-emitting YAG:Ce phosphor compound, a novel method for improving lighting performance of white LEDs with remote phosphor structure, which have an average correlated color temperature (CCT) of 5600–8500 K, is proposed and demonstrated. By varying α-SrO·3B2O3:Sm2+ concentration from 2 to 30% and maintaining 5% SiO2, the obtained results indicated that color rendering index (CRI), color quality scale (CQS), and luminous flux can be increased significantly. Moreover, the Mie-scattering theory is employed to verify the scattering properties, which have an effect on the enhancement of color quality and luminous flux. The results prove a prospective practical solution for manufacturing remote phosphor white LED (RP-WLED) having higher color quality and luminous flux.

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What this paper is about

By adding red-emitting α-SrO·3B2O3:Sm2+ phosphor and SiO2 co-doping particles to yellow-emitting YAG:Ce phosphor compound, a novel method for improving lighting performance of white LEDs with remote phosphor structure, which have an average correlated color temperature (CCT) of 5600–8500 K, is proposed and demonstrated. By varying α-SrO·3B2O3:Sm2+ concentration from 2 to 30% and maintaining 5% SiO2, the obtained results indicated that color rendering index (CRI), color quality scale (CQS), and luminous flux can be increased significantly. Moreover, the Mie-scattering theory is employed to verify the scattering properties, which have an effect on the enhancement of color quality and luminous flux. The results prove a prospective practical solution for manufacturing remote phosphor white LED (RP-WLED) having higher color quality and luminous flux.

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Available abstract

By adding red-emitting α-SrO·3B2O3:Sm2+ phosphor and SiO2 co-doping particles to yellow-emitting YAG:Ce phosphor compound, a novel method for improving lighting performance of white LEDs with remote phosphor structure, which have an average correlated color temperature (CCT) of 5600–8500 K, is proposed and demonstrated. By varying α-SrO·3B2O3:Sm2+ concentration from 2 to 30% and maintaining 5% SiO2, the obtained results indicated that color rendering index (CRI), color quality scale (CQS), and luminous flux can be increased significantly. Moreover, the Mie-scattering theory is employed to verify the scattering properties, which have an effect on the enhancement of color quality and luminous flux. The results prove a prospective practical solution for manufacturing remote phosphor white LED (RP-WLED) having higher color quality and luminous flux.

Key concepts: Phosphor, Luminous flux, Color rendering index, Luminous efficacy, Color temperature, Materials science, Optoelectronics, Light-emitting diode

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Red-emitting α-SrO·3B 2 O 3 :Sm 2+ phosphor: an innovative application for increasing color quality and luminous flux of remote phosphor white LEDs — Research Paper | ScholarLens