Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (8): 20240194.doi: 10.7503/cjcu20240194

• Polymer Chemistry • Previous Articles     Next Articles

One-step Synthesis of Solid-state Fluorescent Nitrogen-doped Carbonized Polymer Dots and Construction of Multicolor LEDs

JIN Peng1, ZHAO Liuxi2, WANG Wei1, SUN Zhengguang1, MA Huijuan2, ZHAN Yuan1()   

  1. 1.Key Laboratory of Polymer Materials Hubei Provincial Key Laboratory,Functional Materials Green Preparation and Application Key Laboratory of the Ministry of Education,College of Materials Science and Engineering,Hubei University,Wuhan 430062,China
    2.Hubei Three Gorges Laboratory,Yichang 443007,China
  • Received:2024-04-17 Online:2024-08-10 Published:2024-05-20
  • Contact: ZHAN Yuan E-mail:zy@hubu.edu.cn
  • Supported by:
    the Open Project of the Hubei Three Gorges Laboratory, China(SK232014)

Abstract:

Nitrogen-doped carbonized polymer dots(NCPDs) were prepared by one-step solvothermal method using citric acid, urea and acrylonitrile as raw materials, and ethanol as solvent. The particle size of NCPDs is about 12—22 nm. NCPDs powder not only can emit yellow fluorescence(λem=570 nm), but also has excellent concentration- dependent fluorescence. Therefore, the NCPDs/silica sol composite films with different NCPDs mass fraction from 0.15% to 45% were prepared by dispersing NCPDs in silica sol, and the solid-state fluorescence emission wavelengths of these composites gradually shift from blue to red region(453—638 nm) with the increase of NCPDs concentration. Forthermore, those NCPDs composites have good fluorescence stability. The NCPDs composites were further applied to construct light emitting diodes(LEDs), and multicolor LEDs from blue light to red light can be obtained. In addition, the excellent solid-state fluorescence properties of NCPDs make them show potential application prospects in the field of fingerprint recognition, so their applicability in fingerprint recognition was also evaluated.

Key words: Carbonized polymer dots, Nitrogen doping, Solid-state fluorescence, Multicolor light emitting diodes, Fingerprinting

CLC Number: 

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