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Phosphor‐in‐fluorescent‐glasses for high color rendering white light emitting diodes
Author(s) -
Yi Seungryeol,
Chung Woon Jin,
Heo Jong
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14871
Subject(s) - phosphor , color rendering index , materials science , fluorescence , luminous efficacy , light emitting diode , color temperature , high color , diode , rendering (computer graphics) , optoelectronics , fluorescent lamp , rgb color model , optics , white light , composite material , computer graphics (images) , layer (electronics) , physics , image (mathematics) , artificial intelligence , color image , computer science , image processing , operating system
Fluorescent glass frits were prepared and used to synthesize phosphor‐in‐fluorescent glass composites (PiFGs) to realize stable white light emitting diodes with high color‐rendering properties. Commercial red, green, and blue phosphors were co‐sintered and red phosphors were partially replaced by Eu 3+ in glass frits. Phosphor‐in‐glass composites were placed on UV ‐light emitting diodes ( UV ‐ LED s) to generate white light. Pure white light with a luminous efficacy=58.4 lm/W, general color rendering index R a =87 and special color rendering index for strong red R 9 =73 was realized with glass frits containing 7 mol% Eu 2 O 3 and RGB ratio of 35:20:15. Luminous efficacy, R a and R 9 increased as red phosphors were replaced by red‐fluorescent glass frits.