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CsCl Modified Ge–Ga–S Glasses Codoped with Eu 2+ and Mn 2+ : A Potential Yellow Phosphor for Solid‐State Lighting
Author(s) -
Yan Qiqi,
Ren Jing,
Chen Guorong
Publication year - 2012
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.12031
Subject(s) - phosphor , luminescence , excitation , doping , energy transfer , analytical chemistry (journal) , materials science , ultraviolet , manganese , atomic physics , chemistry , optoelectronics , physics , metallurgy , quantum mechanics , chromatography
Notably enhanced Mn 2+ yellow emission is observed in CsCl modified and Eu 2+ / Mn 2+ codoped Ge – Ga – S glasses under near‐ultraviolet ( NUV ) excitation. The plausible efficiency of energy transfer ( ET ) from Eu 2+ to Mn 2+ is as high as 91%, which is obtained by measurement of luminescence decay of Eu 2+ in samples doped with and without Mn 2+ . The Eu 2+ / Mn 2+ codoping significantly increases the excitation cross section at the NUV region, which is at heart of the enhanced Mn 2+ yellow emission. The ET processes responsible for the enhanced luminescence are discussed.