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Tailoring of Deep‐Red Luminescence in Ca 2 SiO 4 :Eu 2+
Author(s) -
Sato Yasushi,
Kato Hideki,
Kobayashi Makoto,
Masaki Takaki,
Yoon DaeHo,
Kakihana Masato
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201402520
Subject(s) - phosphor , luminescence , excited state , red light , silicate , white light , quantum efficiency , light emitting diode , materials science , diode , red color , optoelectronics , excitation , analytical chemistry (journal) , mineralogy , chemistry , optics , atomic physics , physics , botany , organic chemistry , quantum mechanics , chromatography , biology
We report a new dicalcium silicate phosphor, Ca 2− x Eu x SiO 4 , which emits red light in response to blue‐light excitation. When excited at 450 nm, deep‐red emission at 650 nm was clearly observed in Ca 1.2 Eu 0.8 SiO 4 , the external and internal quantum efficiencies of which were 44 % and 50 %, respectively. The red emission from Ca 2− x Eu x SiO 4 was strongly related to the peculiar coordination environments of Eu 2+ in two types of Ca sites. The red‐emitting Ca 2 SiO 4 :Eu 2+ phosphors are promising materials for next‐generation, white‐light‐emitting diode applications.