期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 10, 页码 3672-3681出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc05960a
关键词
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资金
- National Natural Science Foundation of China [51872095]
- Program for Innovative Research Team in the University of Ministry of Education of China [IRT_17R38]
- Joint Fund of Ministry of Education of China
- Major Basic Research Cultivation Project of Natural Science Foundation of Guangdong Province [2018B03038009, 2018A030313059]
- Local Innovative Research Team Project of Pearl River Talent Plan [2017BT01X137]
- Program for Jiangmen Innovative Research Team [(2017)385]
- Key Laboratory of Optoelectronic materials and Applications in Guangdong Higher Education [2017KSYS011]
- Major Projects of Guangdong Education Department for Foundation Research and Applied Research [2020ZDZX2009]
The blue fluorescent material Sr3Y(BO3)(3):Bi3+ synthesized in this study showed excellent performance in LED devices, with high electroluminescence efficiency and thermal stability.
In this study, a blue fluorescent material Sr3Y(BO3)(3):Bi3+ was synthesized by the high temperature solid-state reaction method. The corresponding structural characteristics, concentration and temperature dependent luminescence characteristics of Sr3Y(BO3)(3):Bi3+ and the LED device performances were systematically studied. At different excitation wavelengths in the range of 340-375 nm, the photoluminescence (PL) region can be adjusted from green (CIE: (0.2524, 0.4063); Peak: 511 nm) to blue (CIE: (0.1936, 0.1236); Peak: 415 nm). The best excitation peaked at similar to 370 nm, which well matches with the emission of a commercial near-ultraviolet (NUV) light-emitting diode (LED) chip. The thermal quenching experiment was performed, and the activation energy was calculated as 0.23 eV. At high temperature, the Sr2.55Y(BO3)(3):0.45Bi(3+) phosphor presented good thermal stability (79.99% of RT emission intensity at 420 K). LED devices (chip: 370 nm) using the Sr2.55Y(BO3)(3):0.45Bi(3+) phosphor as a fluorescent material showed excellent electroluminescence performance. Under a driving current of 20 mA, the devices showed CIE coordinates of (0.3842, 0.3980), a correlated color temperature (CCT) of 4053 K and a high color rendering index (R-a) of 91.6. This work demonstrates that Sr3Y(BO3)(3):Bi3+ is a promising NUV excited blue fluorescent material which shows advantage in white light-emitting diodes for solid-state lighting.
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