[11a-E217-1~9] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[11a-E217-1] Photo-current properties of n-type conductivity in oxide glasses

Kenta Miyake¹, Yukihide Ishibashi¹, 〇Akira Saitoh¹ (1.Ehime Univ.)

Keywords:

oxide glass,semiconductor,photoconductivity

We will talk about the electronic structure and its transport mechanism of an n-type fluorine-doped tin oxide glass. The glass exhibits an optical bandgap of 3.6 eV, is free of toxic elements, and shows electronic conductivity at room temperature, which is attributed to long-range hopping between nanocrystalline domains within the glass. Photoconductivity measurements, performed using the time-of-flight method, revealed distinct characteristics dependent on the light excitation energy. Dispersive conduction was observed upon excitation by light corresponding to the HOMO-LUMO gap energy, whereas non-dispersive conduction occurred when excited by light with energy exceeding the optical bandgap. Based on these findings, we propose an electronic structure model for a semiconductor oxide glass that is both transparent to visible light and conductive at room temperature.