期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 117, 期 40, 页码 20847-20854出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp4062225
关键词
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资金
- National Natural Science Foundations of China [51002146, 51272242]
- Natural Science Foundations of Beijing [2132050]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-12-0950]
- Fundamental Research Funds for the Central Universities [2011YYL131]
- SB RAS [28.13]
- Beijing Nova Program [xx2013047]
The structural properties of clinopyroxene NaScSi2O6 have been investigated using the X-ray powder diffraction refinement, and the luminescence properties of Eu2+ and Eu2+/Mer-activated NaScSi2O6 have been studied to explore the new materials for phosphor-converted white light ultraviolet light-emitting diodes (UV-LEDs). Eu2+ was introduced into the NaScSi2O6 host in the reducing atmosphere, and the preferred crystallographic positions of the Eu2+ ions were determined based on the different structural models of the NaScSi2O6 host. The as-obtained NaScSi2O6:Eu2+ phosphor shows greenish yellow emission with the broad-band peak at 533 nm, and efficient energy transfer (ET) takes place between Eu2+ and Mn2+ in NaScSi2O6, leading to a series of color-tunable phosphors emitting at 533 and 654 nm for the designed NaScSi2O6:Eu2+,Mn2+ phosphors under excitation at 365 nm. The ET mechanism of Eu2+ and Mn2+ has also been evaluated. We have demonstrated that NaScSi2O6:Eu2+ and NaScSi2O6:Eu2+,Mn2+ materials exhibit great potential to act as the effective phosphors for UV-LEDs.
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