Zhilong Huang, Hu Xu, Yong Luo, Rui Zhang, Yuhong Wang
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引用次数: 0
Abstract
The development of photoluminescent (PL) properties in graphitic carbon nitride (g-C3N4) has been limited by their short PL wavelength. Herein, we synthesized tunable multi-color emissive cyanuric acid-supported g-C3N4 materials (CNS) via a one-pot microwave-assisted method using urea and thiophene-3,4-dicarboxylic acid (TDC) as starting materials. By varying the TDC amount, the solid-state emissive color of CNS samples can be manipulated from blue to orange-red. The incorporation of thiophene ring into the g-C3N4 framework during microwave synthesis enlarges the π-conjugation system, narrowing the band gap from 3.94 to 1.91 eV, as verified by the DFT calculations. The hydrogen-bond networks from cyanuric acid-supported g-C3N4 improves the framework crystallinity, enabling the high emission efficiency (quantum yields up to 0.27). These properties make CNS highly suitable for multi-color light-emitting diodes (LED) applications, particularly in WLEDs with chromaticity coordinates (0.341, 0.359). Additionally, this study pioneers the use of CNS as a solid-state fluorescent probe for Fe3+, expanding its optical application fields. Our findings suggest significant potential for CNSx materials in advanced LED lighting solutions, with broad applicability in illumination, information encryption, and anti-counterfeiting.
期刊介绍:
Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.