期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 3, 期 34, 页码 8949-8955出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc01276g
关键词
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资金
- National Natural Science Funds of China [51372105]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120211130003]
- Ministry of Industry and Information Technology of the Gansu Province
A near-ultraviolet (near-UV) excited phosphor, Ca15Si20O10N30:Ce3+, was synthesized by a solid state reaction, and its crystal structure and luminescence properties were investigated in detail. Ca15Si20O10N30 crystallizes in a cubic unit cell with the space group Pa (3) over bar and the lattice parameters are determined to be a = b = c = 15.4195(3) angstrom. The maximum emission wavelength can be tuned from about 470 to 520 nm as the content of Ce3+ increases due to the energy transfer between various Ce3+ activators located in different coordination environments, which was verified by the time-resolved emission spectroscopy (TRES) and the variation in the decay rate with respect to the detection wavelength. Upon excitation at 365 nm, Ca15Si20O10N30:Ce3+ exhibited a relatively low thermal quenching, and the T-50 is measured to be 233 degrees C. The above results indicate that Ca15Si20O10N30:Ce3+ is a promising candidate for application in white light-emitting diodes (LEDs).
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