Eu3+-doped SrGe4O9 red emitting phosphors: structural, luminescence properties, theoretical calculation and applications

被引：2

作者：

Ji, Changyan ^{[1
]}

Li, Lingzhi ^{[2
]}

Huang, Zhi ^{[2
]}

Wen, Jin ^{[1
]}

Huang, Ting-Hong ^{[3
]}

Tian, Xiuying ^{[1
]}

Wu, Tengyan ^{[1
]}

He, Hengping ^{[2
]}

Zhang, Lei ^{[1
]}

Peng, Yangxi ^{[1
]}

机构：

[1] Hunan Univ Humanities Sci & Technol, Sch Mat & Environm Engn, Hunan Prov Key Lab Fine Ceram & Powder Mat, Loudi 417000, Peoples R China

[2] Natl Elect Ceram Prod Qual Supervis & Inspect Ctr, Loudi 417000, Peoples R China

[3] Sichuan Univ Sci & Engn, Sch Chem Engn, Zigong 643000, Peoples R China

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2020年 / 126卷 / 03期

关键词：

WLED; Red-emitting phosphors; Thermal stability; SrGe4O9; Eu3+; TEMPERATURE-DEPENDENT LUMINESCENCE; JUDD-OFELT ANALYSIS; HIGH COLOR PURITY; WHITE-LIGHT; PHOTOLUMINESCENCE PROPERTIES; THERMAL-STABILITY; FACILE SYNTHESIS; ENERGY-TRANSFER; ENHANCEMENT; INTENSITIES;

D O I：

10.1007/s00339-020-3329-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Eu3+-doped germanate based red emitting phosphors SrGe4O9: xEu(3+) (0 <= x <= 0.5 mol%) were prepared by high-temperature solid-state procedure. Moreover, the Density Functional Theory (DFT) calculation, X-ray diffraction (XRD) Rietveld refinement, scanning electron microscopy (SEM), and photoluminescence (PL) measurement were discussed in detail to fully investigate the crystal structure and PL properties of SrGe4O9: xEu(3+). Furthermore, the Judd-Ofelt (J-O) analysis demonstrated that the Eu3+ ions in the SrGe4O9 host possessed lower sites symmetry. In addition, the phosphor SrGe4O9: 0.35%Eu3+ displayed superior thermal stability with PL intensity at 423 K is around 90% of its initial value at 298 K. As a result, the white light emitting diodes (WLED) device based on SrGe4O9: 0.35%Eu3+ achieved an expected result of a correlated color temperature (CCT) of 4573 K and a color rendering index (CRI) of 80.8 under a voltage of 3 V and a driven current of 20 mA.

引用

页数：10

共 47 条

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