A novel Eu2+ activated G-La2Si2O7 phosphor for white LEDs: SiC-reduction synthesis, tunable luminescence and good thermal stability

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 高性能陶瓷和超微结构国家重点实验室 > 期刊论文

	A novel Eu2+ activated G-La2Si2O7 phosphor for white LEDs: SiC-reduction synthesis, tunable luminescence and good thermal stability
	Wan, Jieqiong 1,2,3; Liu, Qian 1,2; Liu, Guanghui 1,2; Zhou, Zhenzhen 1,2; Ni, Jia 1,2,3; Xie, Rong-Jun 4
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2017
卷号	5 期号:7 页码:1614-1623
英文摘要	A new Eu2+ activated, G-type La2Si2O7 phosphor was synthesized successfully via a novel SiC-reduction route. The valence state of the Eu2+ ions was identified with XRD and XPS analysis and the luminescence spectrum presented Eu2+ broad bands. The G-La2Si2O7: Eu2+ (LPS: Eu2+) phosphor exhibited tunable emission colors depending on the excitation wavelength or the Eu concentration, enabling the production of white light. The color tunable property is ascribed to the component ratio of the two specific luminescent centers, Eu(1) and Eu(2). Eu2+ ions prefer to occupy the La3+ crystallographic sites selectively, which was identified by electron paramagnetic resonance (EPR) spectroscopy. Furthermore, the relative emission intensity of the phosphor at 100 degrees C and 160 degrees C can maintain 89% and 76% of the value measured at room temperature, which is much better than that of most of Eu2+ doped silicon oxides phosphors. The Eu(1) emission possesses a better fluorescence thermal stability than the Eu(2) emission, and an energy transition from Eu(1) to Eu(2) occurs. This better thermal stability and energy transition have been explained by the schematic configuration coordination. A w-LED device was fabricated by combining the prepared La2Si2O7: Eu2+ and commercial BaMgAl10O17: Eu2+ phosphors with a 365 nm n-UV chip. The w-LED device generates white light (color rendering index R-a = 93.9), and its CIE chromaticity coordinates and correlated color temperature (CCT) are (x, y) = (0.3429, 0.3523) and 5090 K, respectively. These results suggest that LPS: Eu2+ has a great potential for use in UV-LED-driven white emitting diodes.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]	Materials Science ; Physics
关键词[WOS]	LIGHT-EMITTING-DIODES ; INORGANIC-COMPOUNDS ; CRYSTAL-STRUCTURE ; SCINTILLATOR MATERIALS ; CATION SUBSTITUTION ; EMISSION PROPERTIES ; MAGNETIC-RESONANCE ; RED LUMINESCENCE ; DOPED LA2SI2O7 ; OXYGEN VACANCY
收录类别	SCI
语种	英语
WOS记录号	WOS:000395890600007
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/23552]
专题	上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China 2.Shanghai Inst Mat Genome, Shanghai 200050, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.NIMS, Sialon Grp, Tsukuba, Ibaraki 3050044, Japan
推荐引用方式 GB/T 7714	Wan, Jieqiong,Liu, Qian,Liu, Guanghui,et al. A novel Eu2+ activated G-La2Si2O7 phosphor for white LEDs: SiC-reduction synthesis, tunable luminescence and good thermal stability[J]. JOURNAL OF MATERIALS CHEMISTRY C,2017,5(7):1614-1623.
APA	Wan, Jieqiong,Liu, Qian,Liu, Guanghui,Zhou, Zhenzhen,Ni, Jia,&Xie, Rong-Jun.(2017).A novel Eu2+ activated G-La2Si2O7 phosphor for white LEDs: SiC-reduction synthesis, tunable luminescence and good thermal stability.JOURNAL OF MATERIALS CHEMISTRY C,5(7),1614-1623.
MLA	Wan, Jieqiong,et al."A novel Eu2+ activated G-La2Si2O7 phosphor for white LEDs: SiC-reduction synthesis, tunable luminescence and good thermal stability".JOURNAL OF MATERIALS CHEMISTRY C 5.7(2017):1614-1623.