Emission-Tunable CuInS2/ZnS Quantum Dots: Structure, Optical Properties, and Application in White Light-Emitting Diodes with High Color Rendering Index

被引：248

作者：

Chuang, Po-Hsiang ^{[1
]}

Lin, Chun Che ^{[1
]}

Liu, Ru-Shi ^{[1
,2
,3
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

[2] Natl Taipei Univ Technol, Dept Mech Engn, Taipei 106, Taiwan

[3] Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 106, Taiwan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 17期

关键词：

CuIns(2); quantum dots; donor-acceptor pair; temperature-dependent photoluminescence; light-emitting diodes; SEMICONDUCTOR NANOCRYSTALS; PHOTOLUMINESCENCE; LUMINESCENT; RED; NONINJECTION;

D O I：

10.1021/am503889z

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

Synthesis and application of CuInS2/ZnS core/shell quantum dots (QDs) with varying [Cu]/[In] ratios were conducted using a stepwise solvothermal route. CuInS2(CIS) core QDs with varying [Cu]/[In] ratios exhibited deep-red emissions result from donor-acceptor pair recombination. The absorption and emission band gap of the CuInS2 QDs increased with the decrease in Cu content. The emission bands of the CuInS2/ZnS were tuned from 550 to 616 nm by controlling the [Cu]/[In] ratio after coating ZnS layer. The CIS QDs model was developed to elucidate the synthesized crystal structure and photoluminescence of the QDs with various [Cu]/[In] ratios. Temperature-dependent photoluminescence spectra of the CIS2/ZnS QDs were also investigated. The temperature dependency of the photoluminescence energy and intensity for various CIS/ZnS QDs were studied from 25 to 200 degrees C. Efficient white light-emitting diodes with high color rendering index values (Ra = 90) were fabricated using CIS/ZnS QDs as color converters in combination with green light-emitting Ba2SiO4:Eu2+ phosphors and blue light-emitting diodes.

引用

页码：15379 / 15387

页数：9

共 49 条

[1]

Ce-Doped YAG Nanophosphor and Red Emitting CuInS2/ZnS Core/Shell Quantum Dots for Warm White Light-Emitting Diode with High Color Rendering Index [J].