What question did this study set out to answer?

To investigate the photoluminescence features of g-C3N4 thin films across a temperature range.

May 27, 2026Bulletin of the Russian Academy of Sciences Physics0 citations

Photoluminescence Features of g-C3N4 Thin Films in the Temperature Range of 40–327 K

III. IlyashenkoUral Federal University NMN. A. MartemyanovUral Federal University SSS. S. SavchenkoUral Federal University

Key Points

To investigate the photoluminescence features of g-C3N4 thin films across a temperature range.
Synthesis of g-C3N4 thin films via thermal polycondensation at 450–550°C.
Characterization using X-ray diffraction, infrared spectroscopy, scanning electron microscopy, and atomic force microscopy.
Analysis of photoluminescence spectra from 40 to 327 K.
Identification of two thermally activated channels for non-radiative relaxation.
Activation energies for relaxation channels were found to be 9 meV and 147 meV.
Quantitative analysis of thermal quenching processes was performed.

Abstract

t—Graphite-like carbon nitride thin films were synthesized by the thermal polycondensation method at 450–550°C; characterization of the samples was performed using X-ray diffraction, infrared spectroscopy, scanning electron microscopy, and atomic force microscopy. For the first time, the features of photoluminescence spectra of the g-C3N4 thin films were investigated in the temperature range from 40 to 327 K; the processes of observed thermal quenching were quantitatively analyzed. Two thermally activated channels for non-radiative relaxation were revealed with activation energies of 9 and 147 meV.

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