Photoelectric Properties of Nano Composite Material Films TiO₂/SnO₂ Prepared by Co-Spraying Pyrolysis Method

Authors:

^{Tran CK* and Tuyen KTT}

DOI: 10.23880/nnoa-16000111

Volume 2, Issue 1

Abstract

Mixed films TiO₂/SnO₂ were prepared by co-pyrolysis method from solution mixture of TiCl₄ and SnCl₄ salts. Investigating results of X-ray diffraction showed that upon spray pyrolysis conditions were carried out, compounds of TiCl₄ and SnCl₄ are not affected each other. Thus, oxide material systems were created from pyrolysis TiCl₄ and SnCl₄ salts which are the mixed systems of nano composite shape. Special point of these films is that there are appearances of photoconductivity that depends strongly on ratio of initial materials and prepared temperatures. Absorptive spectrum UV – Vis and luminescent spectrum of nano composite (nco) TiO₂/SnO₂ films were measured to determine width of forbidden band. Results showed absorption and luminescent spectrum of them all have red moving to visible light region, these showed that there is narrowing forbidden band of nco TiO₂/SnO₂ films compared with nano TiO₂ films prepared by the same method. The electric properties of the films as surface’s resistivity, carrier density, sensitivity of carriers based on Hall Effect were also carried out to explain for role of component phases within changing photo-electric properties of nano TiO₂ films.

Keywords:

Nco TiO₂/SnO₂; TiO₂/SnO₂ film; Co-spraying pyrolysis method

View PDF