期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 7, 期 9, 页码 2596-2603出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tc00159j
关键词
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资金
- National Natural Science Foundation of China (NSFC)-Yunnan Province [U1702254, U1301242]
- NSFC [21771195]
- Natural Science Foundation of Guangdong Province [2016A030313305]
- Special Fund of Guangdong Province Project for Applied Science and Technology Research and Development [2017B090917001, 2016B090931007, 2015B090927002]
- Science and Technology Planning Project of Guangzhou City [201704030020, 201604016005]
- National Natural Science Foundation of China [11375278]
- National Natural Science Foundation of China (NSFC)-Guangdong Province [U1702254, U1301242]
Single-component white light phosphors with a broad and full color spectrum are urgently required to overcome residual problems with commercial phosphors. In this paper, we describe how Eu3+, as the dopant of Sr3ZnTa2O9 (SZT), plays an important role in structural modulation (including structural order-disorder and intrinsic oxygen defects), as demonstrated by electronic structural calculations and systematic experiments. Furthermore, D-5(0) F-7(2) emission of Eu3+ provides the red component of the emission spectrum and increases the color rendering index of SZT:Eu3+ phosphors. Consequently, the resulting phosphor SZT:10%Eu3+ shows significantly enhanced emission intensity, and its broadband emission covers the entire visible region from 400 nm to 720 nm. A fabricated LED device using a near-ultraviolet 370 nm chip coated with a single-component, the SZT:10%Eu3+ phosphor, shows warm white emission with a high color rendering index (R-a = 82).
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