Preparation of Controllable Luminescence CDs@MOFs Fluorescent Composites and Their Application in High Color Rendering White LED

Jun-jian HE; Zhuo-bao HONG; Lin-liang YU; Guang-qi HU; Xiao-tang LIU

doi:10.37188/CJL.20210122

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Preparation of Controllable Luminescence CDs@MOFs Fluorescent Composites and Their Application in High Color Rendering White LED

Synthesis and Properties of Materials | 更新时间：2021-07-22

- Preparation of Controllable Luminescence CDs@MOFs Fluorescent Composites and Their Application in High Color Rendering White LED
  增强出版
- Chinese Journal of Luminescence Vol. 42, Issue 7, Pages: 984-996(2021)
- 作者机构：
  
  1.华南农业大学　材料与能源学院，广东　广州　 510642
  2.广东技术师范大学　光电工程学院，广东　广州　 510665
  3.华南农业大学材料与能源学院　生物基材料与能源教育部重点实验室，广东　广州　 510642
- 作者简介：
- 基金信息：
- DOI：10.37188/CJL.20210122
  CLC： O482.31;TN312.8
- Published：01 July 2021，
  
  Received：06 April 2021，
  
  Revised：20 April 2021，
- 稿件说明：
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JUN-JIAN HE, ZHUO-BAO HONG, LIN-LIANG YU, et al. Preparation of Controllable Luminescence CDs@MOFs Fluorescent Composites and Their Application in High Color Rendering White LED. [J]. Chinese journal of luminescence, 2021, 42(7): 984-996.
DOI：

JUN-JIAN HE, ZHUO-BAO HONG, LIN-LIANG YU, et al. Preparation of Controllable Luminescence CDs@MOFs Fluorescent Composites and Their Application in High Color Rendering White LED. [J]. Chinese journal of luminescence, 2021, 42(7): 984-996. DOI： 10.37188/CJL.20210122.

摘要

选用中性红和硫脲作为原料，制备出一种540 nm波长发射的新型黄光碳点(CDs)水溶液，具有激发依赖特性。选择Al-MOFs和Zn-MOFs分别作为CDs的载体基质，得到CDs@Al-MOFs和CDs@Zn-MOFs两种复合荧光材料，都显示出非激发依赖特性。而CDs@Al-MOFs和CDs@Zn-MOFs的最佳发射峰分别位于555 nm 和612 nm，与CDs水溶液540 nm的发射波长相比，都出现不同程度的红移。通过对黄光CDs及其复合荧光材料进行TEM、XRD、FT-IR、XPS、UV-Vis和FL等系列表征，证明其发光机理是由CDs的表面态发光转变为分子态发光占主导地位。通过调整两种复合荧光材料的配比可获得不同发光性能的白光LED器件，当CDs@Al-MOFs与CDs@Zn-MOFs的质量比为1∶0.65时，器件的色温为3 968 K、显色指数达82.4，表明该碳点基复合荧光材料在白光LED领域具有广阔的发展前景和应用价值。

Abstract

In this paper

neutral red and thiourea were chosen as the raw materials to prepare a novel yellow light carbon dots(CDs) aqueous solution emitting at 540 nm with excitation-dependent fluorescence property. CDs@Al-MOFs and CDs@Zn-MOFs composite fluorescent materials were prepared by Al-MOFs and Zn-MOFs as the support matrices for CDs

respectively

and both of them shown excitation-independent fluorescence property. The optimal emission peaks of CDs@Al-MOFs and CDs@Zn-MOFs were at 555 nm and 612 nm

respectively. Both composites appeared red-shifted to different degrees compared to the emission wavelength at 540 nm of CDs aqueous solution. Through a series of characterizations including TEM

XRD

FT-IR

XPS

UV-Vis and FL on yellow light CDs and their composite fluorescent materials

it was proven that the luminescence mechanism was dominated by the transition of the surface state luminescence of CDs to molecular state luminescence. White light LED devices with different luminescent properties can be obtained by adjusting the ratio of two kinds of composite fluorescent materials. When the mass ratio of CDs@Al-MOFs and CDs@Zn-MOFs is 1∶0.65

the color temperature of the white light LED is 3 968 K and the color rendering index is as high as 82.4

indicating that the CDs@MOFs composite fluorescent material has broad development prospects and application value in the field of white LED.

关键词

黄色发光碳点有机金属框架固态照明白光LED

Keywords

yellow emissive carbon dotsmetal-organic frameworksolid lightingwhite light-emitting diodes

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