A novel phosphor structure for improving the luminous flux of white LEDs

Nguyen Thi Phuong Thao, Jan Nedoma, Le Anh Vu, Dieu An Nguyen Thi, Dieu An Nguyen Thi

Abstract


This section focuses on the color uniformity and luminous production of multi-chip white-emitted LED lighting systems (MCW-LEDs) in improving illuminated performance. To accomplish the desired outcome, CaO:Sb3+ must be mixed with their phosphor compounding, which has been shown to have a massive impact on illuminating effectiveness. There is also evidence that the increasing of yellowish-green-emitted phosphorus CaO:Sb3+ concentration supports color homogeneity as well as luminescent effectiveness enhancements in MCW-LEDs featuring a 8500 K correlating colour temperature (CCT). Meanwhile, that rise in CaO:Sb3+ concentration leads to the gradually deteriorating color quality scale. Thus, if appropriate concentration and particle size of CaO:Sb3+ phosphor are determined, it is not hard to obtain such an excellent presentation in color uniformity, color quality scale and luminescence of MCW-LEDs.

Keywords


CaO:Sb3+; Color rendering index; Dual-layer phosphor; Luminous efficacy; Mie-scattering theory

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DOI: https://doi.org/10.11591/eei.v11i2.3608

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