Investigation on Mechanism of Enhanced Luminescence Efficiency of Carbon Quantum Dots Through Thiol-ene Cross-linking

ZHANG Pei; CHAI Xinyi; LI Shaojun; REN Linjiao; ZHENG Yibo; QIN Zirui; ZHANG Jitao; ZHANG Qingfang; JIANG Liying

doi:10.37188/CJL.20230173

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Investigation on Mechanism of Enhanced Luminescence Efficiency of Carbon Quantum Dots Through Thiol-ene Cross-linking

Synthesis and Properties of Materials | 更新时间：2023-11-27

- Investigation on Mechanism of Enhanced Luminescence Efficiency of Carbon Quantum Dots Through Thiol-ene Cross-linking
  增强出版
- Chinese Journal of Luminescence Vol. 44, Issue 11, Pages: 1990-2001(2023)
- 作者机构：
  
  1.郑州轻工业大学电气信息工程学院，河南郑州　450002
  2.郑州轻工业大学电子信息学院，河南郑州　450002
  3.郑州轻工业大学量子科技研究院，河南郑州　450002
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(12004348;62073299;61801436);Project of Central Plains Science and Technology Innovation Leading Talents(224200510026);Henan Province Science and Technology Plan Project(212102210002;232102220008;212102210196;212102210278)
- DOI：10.37188/CJL.20230173
  CLC： O482.31
- Published：05 November 2023，
  
  Received：27 July 2023，
  
  Revised：13 August 2023，
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张培,柴鑫毅,李少君等.硫醇⁃烯交联增强碳量子点发光效率机理研究[J].发光学报,2023,44(11):1990-2001.

ZHANG Pei,CHAI Xinyi,LI Shaojun,et al.Investigation on Mechanism of Enhanced Luminescence Efficiency of Carbon Quantum Dots Through Thiol-ene Cross-linking[J].Chinese Journal of Luminescence,2023,44(11):1990-2001.
张培,柴鑫毅,李少君等.硫醇⁃烯交联增强碳量子点发光效率机理研究[J].发光学报,2023,44(11):1990-2001. DOI： 10.37188/CJL.20230173.

ZHANG Pei,CHAI Xinyi,LI Shaojun,et al.Investigation on Mechanism of Enhanced Luminescence Efficiency of Carbon Quantum Dots Through Thiol-ene Cross-linking[J].Chinese Journal of Luminescence,2023,44(11):1990-2001. DOI： 10.37188/CJL.20230173.

摘要

通过溶剂热反应法制备了N和O含量不同的碳量子点（CQDs）溶液，利用“点击”化学反应将CQDs与非计量硫醇⁃烯（OSTE）聚合物交联固化，形成CQDs/OSTE复合材料。固化后，O⁃CQDs的荧光量子产率从液态下的2.6%提高到16.5%，增大倍数约为6倍；N，O⁃CQDs的荧光量子产率从液态下的4.5%提高到17.6%，增大倍数约为4倍。通过微结构和光学特性分析，我们认为交联固化后与氧相关的非辐射复合中心减少、非辐射跃迁过程抑制以及N和S的协同效应是提高CQDs材料发光效率的主要原因。本文的研究成果有望为CQDs的固态转化、表面功能化以及荧光增强提供一种有效、便捷的方法，从而促进CQDs在发光二极管、激光器和发光太阳能聚光器等领域的应用。

Abstract

The carbon quantum dots（CQDs） containing different N， O contents were prepared by using solvothermal reaction， and the CQDs/OSTE composites were obtained quickly through cross-linking and curing the CQDs with the off-stoichiometric thiol-ene （OSTE） polymer

via

the reaction of “click” chemistry. It is found the fluorescence quantum yield（QY）of O-CQDs and N，O-CQDs were increased to 16.5% and 17.6%， respectively. Compared with their QYs（2.6% and 4.5%）in the liquid environment， the enhancement of about 6 and 4 times was achieved， respectively. By analyzing the changes of microstructure and optical properties of CQDs materials before and after curing， we suggested that the enhanced PL QY might originate mainly from the reduction of the oxygen-related non-radiative recombination center， the suppression of the non-radiative transition probability and the synergistic effect of N and S. Our results provide a convenient and efficient method for solid state transformation， surface functionalization and fluorescence enhancement of CQDs， which will promote the application of CQDs in light-emitting diodes， lasers and luminescent solar concentrators.

关键词

碳量子点非计量硫醇-烯聚合物交联增强荧光表面态与氧相关的发光中心

Keywords

carbon quantum dotsoff-stoichiometric thiol-ene polymercross-linking enhanced emissionsurface stateluminescence center related to oxygen

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