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Nanosegregation and Neighbor‐Cation Control of Photoluminescence in Carbidonitridosilicate Phosphors
Author(s) -
Huang WanYu,
Yoshimura Fumitaka,
Ueda Kyota,
Shimomura Yasuo,
Sheu HwoShuenn,
Chan TingShan,
Greer Heather F.,
Zhou Wuzong,
Hu ShuFen,
Liu RuShi,
Attfield J. Paul
Publication year - 2013
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.201302494
Subject(s) - phosphor , photoluminescence , quenching (fluorescence) , materials science , nanostructure , chemistry , analytical chemistry (journal) , nanotechnology , optoelectronics , fluorescence , physics , optics , environmental chemistry
Blue, green, and yellow phosphors are obtained in the Sr 1− x Y 0.98+ x Ce 0.02 Si 4 N 7− x C x system ( x =0→1). Decreases in thermal quenching barrier height with x result from a dominant neighboring‐cation effect, through which the replacement of Sr 2+ by Y 3+ reduces the covalency of CeN bonding. Green emission is observed from a cation‐segregated nanostructure of SrYSi 4 N 7 and Y 2 Si 4 N 6 C domains in x =0.2–0.6 samples.