应用化学 ›› 2022, Vol. 39 ›› Issue (11): 1766-1773.DOI: 10.19894/j.issn.1000-0518.220102

• 研究论文 • 上一篇    下一篇

硅、氮共掺杂碳点荧光粉的制备及发光性能

孟丹, 郑开元, 陈珊珊, 卓钊龙, 王丽丽()   

  1. 东北林业大学化学化工与资源利用学院,哈尔滨 150040
  • 收稿日期:2022-04-02 接受日期:2022-06-30 出版日期:2022-11-01 发布日期:2022-11-09
  • 通讯作者: 王丽丽
  • 基金资助:
    国家自然科学基金(21304014);中央高校基本科研业务费专项资金(2572017CB24);黑龙江省大学生创新创业计划训练项目(202110225238)

Preparation and Luminescence Properties of Silicon and Nitrogen Co⁃doped Carbon Dots Phosphors

Dan MENG, Kai-Yuan ZHENG, Shan-Shan CHEN, Zhao-Long ZHUO, Li-Li WANG()   

  1. Northeast Forestry University College of Chemical Engineering and Resource Utilization,Harbin 150040,China
  • Received:2022-04-02 Accepted:2022-06-30 Published:2022-11-01 Online:2022-11-09
  • Contact: Li-Li WANG
  • About author:rainkiss1014@163.com
  • Supported by:
    the National Natural Science Foundation of China(21304014);the Fundamental Research Funds for the Central Universities, China(2572017CB24);the Innovation and Entrepreneurship Training Program for College Students in Heilongjiang Province(202110225238)

摘要:

采用N-苯基对苯二胺和3-氨基丙基三甲氧基硅烷为原料,通过光化学催化法合成了高荧光强度的硅、氮共掺杂碳点(Si/N-CDs)。通过透射电子显微镜(TEM)、X射线光电子能谱(XPS)、荧光光谱、X射线衍射(XRD)和红外光谱(FT-IR)等对Si/N-CDs进行了表征。制备的 Si/N-CDs形貌呈球形,平均直径约6.45 nm,在365 nm紫外光照射下发明亮的蓝绿色荧光,量子产率可达30.8%,连续30 d测试Si/N-CDs均保持高的荧光强度。用Si/N-CDs替代传统的红/绿/蓝三基色稀土荧光粉中的蓝/绿稀土荧光粉,并与红色荧光粉(Sr,Ca)AlSiN3∶Eu2+复合制备白光二极管(White Light Emitting Diode, WLED)。在60 mA电流下运行WLED,可实现86.9的高显色指数和7.76 lm/W的发光效率,色坐标是(0.3773, 0.3734),色温为4062 K,并且色点位于黑体普朗克轨迹上,表明制备的WLED可以产生高质量的照明效果。硅、氮共掺杂碳点具有简便的制备方法和优异的光学性质,并能够代替蓝/绿色稀土荧光粉与红光荧光粉复合制备高质量照明的WLED,扩展了碳点在发光器件中的应用。同时,Si/N-CDs兼具低毒性、稳定的光学性质和简单的合成工艺,使其在蓝色和绿色稀土荧光粉的替代中具有潜在的商业应用前景。

关键词: 硅/氮共掺杂碳点, 光化学合成, 光学性质, 发光二极管

Abstract:

High-fluorescence intensity silicon/nitrogen co-doped carbon dots (Si/N-CDs) are successfully synthesized by photochemical catalysis, using N-phenyl p-phenylenediamine and 3-aminopropyl trimethoxysilane as the raw materials. The properties of Si/N-CDs are characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), fluorescence spectroscopy, X-ray diffraction (XRD), and infrared spectroscopy (FT-IR), respectively. Si/N-CDs have a spherical shape with an average diameter of 6.45 nm, a bright blue-green fluorescence under 365 nm UV illumination, as well as a quantum yield of 30.8%. The Si/N-CDs are continuously tested for 30 days and 5 h of continuous ultraviolet radiation. In this study, Si/N-CDs are used to replace the blue and green rare earth phosphor in the red/green/blue trichromatic rare earth phosphor, and the white light-emitting diode (WLED) is prepared by compounding with a red phosphor (Sr,Ca) AlSiN3∶Eu2+ composite. Running the WLED at 60 mA current, a high color rendering index of 86.9 and a luminescence efficiency of 7.76 lm/W can be achieved. The color coordinates of the WLED are (0.3773, 0.3734), the color temperature is 4062 K, and the color points located on the blackbody Planck trajectory, indicating that the prepared WLED can produce high-quality illumination effects. The silicon and nitrogen co-doped carbon dots have facile preparation method and excellent optical properties, which can replace blue/green rare earth phosphors to prepare high-quality lighting WLED with red light-emitting phosphors, expanding the application of carbon dots in light-emitting devices. Meanwhile, Si/N-CDs have low toxicity, stable optical properties and simple synthesis process, making it of potential commercial application prospects in the replacement of blue/green rare earth phosphors.

Key words: Silicon and nitrogen co-doped carbon dots, Photochemical synthesis, Optical properties, Light-emitting diodes

中图分类号: