Synthesis and enhanced photo/thermal stability of high-luminescent red- emitting CdTe@CaCO3 composite for LED applications

被引：9

作者：

Zhang, Xinguo ^{[1
]}

Sun, Zishan ^{[1
]}

Zhou, Chunyan ^{[2
]}

Zhu, Zhenpeng ^{[1
]}

Guo, Ziying ^{[1
]}

Shen, Jinhai ^{[2
]}

Lin, Yuxuan ^{[2
]}

Xiao, Shuang ^{[2
]}

Chen, Liang ^{[2
]}

Zheng, Xihua ^{[2
]}

Wu, Zhan-Chao ^{[3
]}

机构：

[1] Southern Med Univ, Sch Pharmaceut Sci, Guangdong Prov Key Lab New Drug Screening, Guangzhou Key Lab Drug Res Emerging Virus Prevent, Guangzhou 510515, Guangdong, Peoples R China

[2] Guangxi Med Univ, Coll Pharmaceut Sci, Nanning 530021, Peoples R China

[3] Qingdao Univ Sci & Technol, State Key Lab Base Ecochem Engn, Coll Chem & Mol Engn, Lab Inorgan Synth & Appl Chem, Qingdao 266042, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Composite material; Quantum dots; Luminescence; LED; CDTE QUANTUM DOTS; SENSITIZED SOLAR-CELLS; ONE-POT SYNTHESIS; LIGHT; PHOTOLUMINESCENCE; NANOPARTICLES; NANOCRYSTALS; PHOSPHORS;

D O I：

10.1016/j.ceramint.2018.12.137

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High-luminescent CdTe@CaCO3 composite with strong and stable solid-state red emission (PLQY = similar to 50%) is synthesized via a facile co-precipitation method. The composite particles show rice-like shape with narrow size distribution, non-agglomeration, and smooth surface. A continuous tune of emission wavelength from 690 to 660 nm is achieved by increasing CaCO3 coating proportion. Compared with solid-state CdTe QDs powder, CdTe@CaCO3 composites exhibits a greatly enhancement in emission intensity (280% of initial intensity), remarkably enhancement of photostability (90% after 12 h UV irradiation) and thermal stability (70% at 180 degrees C). Those improvements are attributed to the effective protection and surface passivation of coated CaCO3 layer on CdTe cores. Using yellow-emitting YAG phosphor and red-emitting CdTe@CaCO3 composite as color-converted layer, the fabricated white LED prototype exhibits high color rendering index (94.3) and low color temperature (3964 K) with proper CIE coordinates (0.3773, 0.3604).

引用

页码：6484 / 6490

页数：7

共 32 条

[1] Efficiency enhancement of solid-state PbS quantum dot-sensitized solar cells with Al2O3 barrier layer [J].