Graphitic Carbon Nitride Nanomaterials for Multicolor Light-Emitting Diodes and Bioimaging

作者：Huijun Zhang, Daiwei Zheng, Zhuang Cai, Zhiping Song, Yuanteng Xu, Ruiqing Chen, Chang Lin, Liangqia Guo · 发表于：ACS Applied Nano Materials · 年份：2020 · DOI：10.1021/acsanm.0c01197 · 被引用次数：69 · 研究领域：Advanced Photocatalysis Techniques、Luminescence and Fluorescent Materials、2D Materials and Applications

The application of fluorescent graphitic carbon nitride (g-C 3 N 4 ) nanomaterials was limited by short photoluminescence (PL) wavelength. It is great desirable to develop g-C 3 N 4 nanomaterials with long PL wavelength and high quantum yield to expand their application. Herein phenyl-modified and sulfur doped g-C 3 N 4 (PhCNS) powders with tunable PL peak from 520 to 630 nm were prepared by copolymerization of 2,4-diamino-6-phenyl-1,3,5-triazine and trithiocyanuric acid. The copolymerization process of PhCNS powders was proposed after chemical structure characterization and PL mechanism of PhCNS powders were investigated by transient fluorescence. In virtue of tunable PL color, broad PL peak, and high quantum yield, PhCNS powders were utilized to fabricate green, yellow, and white light-emitting diodes with high color quality and PhCNS nanosheets were applied for multicolor bioimaging. This work provides a pathway for exploring g-C 3 N 4 nanomaterials with long PL wavelength and facilitates their application in biocompatible optoelectronic devices, fluorescent bioimaging.