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Temperature‐Sensitive Photoluminescence Property and Energy Transfer Mechanism in the Silicate Phosphor MgY 4 Si 3 O 13 : Eu 3+
Author(s) -
Ci Zhipeng,
Guan Runnan,
Nie Kaihui,
Liu Limei,
Han Lili,
Zhang Jiachi,
Wang Yuhua
Publication year - 2015
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.13628
Subject(s) - photoluminescence , phosphor , excited state , materials science , electric dipole transition , luminescence , rietveld refinement , quenching (fluorescence) , analytical chemistry (journal) , emission spectrum , spectral line , dipole , atomic physics , chemistry , crystallography , crystal structure , optoelectronics , physics , optics , fluorescence , magnetic dipole , organic chemistry , chromatography , astronomy
A red‐emitting phosphor MgY 4 Si 3 O 13 :Eu 3+ was synthesized by conventional solid‐state reaction for the first time. Photoluminescence spectra show that the phosphor can be efficiently excited by ultraviolet and blue light and exhibit an intense emission at 615 nm due to the dominant 5 D 0 → 7 F 2 electric dipole transition of Eu 3+ . The decay times of Eu 3+ monitored at the different wavelengths present an interesting change trend. According to the results of XRD Rietveld refinement, in a unit cell, the number of Eu 3+ is obtained to be 0.064 for 4 f site and 0.294 for 6 h site. The remarkable preference occupancy for one site could be the leading reason of the abnormal change in decay times. The testing of thermal quenching indicates that the photoluminescence intensity of the phosphor is very sensitive to temperature and furthermore, the emission intensities from 5 D 1 → 7 F J and 5 D 0 → 7 F J show the different decay ratios with the increase in temperature. Based on the configurational coordinate diagram, an underlying mechanism is proposed and can explain the phenomenon reasonably. The mechanism could be helpful for the understanding of the energy transfer phenomenon among the various energy levels in the process of temperature change as reference.