New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency

CHENG Yanhua; XIE Bin; LUO Xiaobing

doi:10.11949/j.issn.0438-1157.20170614

您当前的位置：

首页 >

文章列表页 >

New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency

更新时间：2025-12-10

- New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency
- CIESC Journal Issue S1, Pages: 247-253(2017)
- 作者机构：
  
  华中科技大学能源与动力工程学院,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170614
  CLC： Q127.2TN31
- Online First：31 August 2017，
  
  Published：31 August 2017
- 稿件说明：
移动端阅览
CHENG Yanhua, XIE Bin, LUO Xiaobing. New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency[J]. CIESC Journal, 2017, (S1): 247-253.
DOI：

CHENG Yanhua, XIE Bin, LUO Xiaobing. New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency[J]. CIESC Journal, 2017, (S1): 247-253. DOI： 10.11949/j.issn.0438-1157.20170614.

摘要

研究了胶体固化温度对高性能量子点白光LED的光学性能的影响。首先运用一种新结构的光转换材料量子点-介孔硅微球，将其与荧光粉和硅胶共混形成荧光胶体，点涂到蓝光芯片上形成一种新型的量子点转换LED。相比传统的LED，这种新型LED的光效提升56%，显色指数Ra达96，在20~400 mA电流驱动下Ra维持在92以上。随后分析胶体固化温度对其光学性能的影响，并分析了物理机制。结果表明：在100℃固化时光效和Ra衰减均较严重；60℃固化时光效衰减很小，Ra的衰减约为100℃时的1/2。衰减的原因是固化积累的热量影响了量子点本身的性能，从而影响光功率大小，最终导致光效和Ra的衰减。

Abstract

In order to investigating the effect of heat on quantum dots(QDs)-converted light-emitting diodes(LEDs) and pursuing the excellent performance of QDs-converted LEDs

Quantum dots-mesoporous silica(QDMS) was prepared to mix with phosphor and silica resin

which was packaged onto a blue chip

forming a new type of QDs-converted LED. The light conversion efficiency(LCE) and color rendering index(CRI) of the new QDs-converted LED and traditional phosphor-converted LED were respectively measured and compared. The impact of changing current on the performance of the new type of LED was explored. Finally

the light power of the new type of LED before and after solidification were measured

which was solidified respectively in 100℃ and 60℃. Results suggested that the LCE of the new type of LED reached 110 lm·W-1

improved by about 56% relative to phosphor-converted LED

CRI attained 96(maximum is 100) and remained above 92 driven by current varing from 20 to 400 mA

which demonstrated that the new type of QDs-converted LED possess obvious advantages compared to the traditional phosphor-converted LED. The decline of the LCE and CRI through solidification of the new type of LED solidified under 60℃ were approximately half of that under 100℃

which revealed that heat transfer must be considered carefully during the fabrication of QDs-converted LED.

关键词

Keywords

references

Views

104

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study on boiling characteristics of liquid crystal elastomer surfaces with thermally adaptive wettability

Synthesis of amphiphilic polyphosphoester-PTX prodrug and its potential in reduction-responsive drug release

Enhanced phase change energy storage/release properties by combining porous materials and water-based carbon nanotube under magnetic regulation

Preparation and thermal properties of degradable flexible phase change films

Research progress on structural modulation and functionalized preparation of phenolic resin-based carbon microspheres

Related Author

CHEN Shuai

HU Yanwei

LIU Zihe

JIA Shaokun

CHEN Xudong

FU Weidong

LI Jinjin

ZHAO Ling

Related Institution

School of Energy Science Engineering, Harbin Institute of Technology

Suzhou Research Institute, Harbin Institute of Technology

China State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology

School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture

College of Energy and Power Engineering, Zhengzhou University of Light Industry

⁰