The electronic properties of amorphous carbon nitride were studied by x-ray-absorption near-edge structure (XANES) and valence-band photoelectron spectroscopy (PES). The nitrogen incorporation was found to induce graphitization, as evidenced by an increase of the sp(2) cluster in C and N K-edge XANES spectra. The structure is found to be similar to pyridine. Hybridized C-N bond lengths were determined from the position of the sigma(*) resonance of XANES spectra and the obtained results suggest sp(2) hybridization. A valence-band PES spectrum showed that the p-pi band became more intense than the p-sigma band upon higher at. % nitrogen addition, which confirmed the role played by the pi bonds in controlling the electronic structure of a-CNx films. (c) 2005 American Institute of Physics.
Ray, SC., Pao, CW., Chiou, JW., Tsai, HM., Jan, JC., Pong, WF., McCann, R., Roy, SS., Papakonstantinou, P., & McLaughlin, JAD. (2005). Electronic properties of a-CNx thin films: An x-ray-absorption and photoemission spectroscopy study. Journal of Applied Physics, 98(3), 033708. https://doi.org/10.1063/1.1994933