期刊
CHEMICAL ENGINEERING JOURNAL
卷 385, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.123392
关键词
Structural derivation; Phosphor; Na2HfSiO5:Eu2+; Photoluminescence; Cathodoluminescence
资金
- Key research and development plan of science and technology department of Gansu province [18YF1NA104]
- Gansu Province Development and Reform commission
- State Key Laboratory on Integrated Optoelectronics [IOSKL2013KF15]
- National Natural Science Foundation of China [51672115]
A novel yellow-green emitting phosphor Na2HfSiO5:Eu2+ is successfully synthesized through solid-state reaction for the first time. Under the 369 nm excitation, the Na2HfSiO5:Eu2+ phosphors exhibit a broad yellow emission peaking at 551 nm with FWHM about 100 nm. The Na2HfSiO5:Eu2+ phosphors exhibit the asymmetric emission peaks owing to the Eu2+ partial occupation of four different Na+ sites with different environment. The energy transfer between Eu2+ ions appears by dipole-dipole interaction. A WLED lamp with high Ra (90) and low CCT (3875 K) was obtained by combing Na2HfSiO5:Eu2+ with BaMgAl10O17:Eu2+ (BAM), CaAlSiN3:Eu2+ and n-UV chip (lambda(max) = 380 nm). Under the low voltage and current conditions, the phosphor exhibits perfect stability and excellent anti degradation performance. All these results suggest that Na2HfSiO5:Eu2+ phosphor would be a potential candidate for n-UV LED and FED applications.
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