Correlation between the Annealing Effect and the Electrical Characteristics of the Depletion Region in ZnO, SnO₂and ZTO Films

Abstract

To research the correlation between oxygen vacancy and the electrical characteristics of ZTO, which is made by using a target mixed ZnO:SnO 2 =1:1, the ZnO, SnO 2 and ZTO were analyzed by PL, XPS, XRD patterns and electrical properties. It was compared with the electron orbital spectra of O 1s in accordance with the electrical characteristics of ZnO, SnO 2 and ZTO. The electrical characteristics of ZTO were improved by increasing the annealing temperatures, due to the high degree of crystal structures at a high temperature, and the physical properties of ZTO was similar to that of ZnO. The amorphous structure of SnO 2 was increased with increasing the temperature. The Schottky contact of oxide semiconductors was formed using the depletion region, which is increased by the electron-hole combination due to the annealing processes. ZnO showed the Ohmic contact in spite of a high annealing temperature, but SnO 2 and ZTO had Schottky contact. As such, it was confirmed that the electrical properties of ZTO are affected by the molecules of SnO 2 .

A Simple Absorbent Cotton Biotemplate to Fabricate SnO2 Porous Microtubules and Their Gas-Sensing Properties for Chlorine

“…The Sn 3d high-resolution spectrum in Figure b and e can be fitted into Sn 3d 3/2 and 3d 5/2 , and the spin–orbit splitting is 8.4 eV, which is in agreement with the value of SnO 2 . In addition, the O 1s high-resolution XPS spectrum of SnO 2 can be deconvoluted into three peaks in Figure c and f. The peaks at 531.0 and 532.2 eV belong to the lattice oxygen ((O) latt ) and the oxygen vacancies (( V O •• ) surf ) in SnO 2 , whereas the peak at about 533.3 eV can be attributed to the surface hydroxyl groups ((O) OH ) . Obviously, more oxygen vacancies are detected in SnO 2 PMs (24.51%) relative to SnO 2 particles (14.6%).…”

“…) surf ) in SnO 2 , whereas the peak at about 533.3 eV can be attributed to the surface hydroxyl groups ((O) OH ). 32 Obviously, more oxygen vacancies are detected in SnO 2 PMs (24.51%) relative to SnO 2 particles (14.6%). The difference between SnO 2 PMs and particles is the use of the biotemplate before calcination.…”

A Study on an Oxygen Vacancy and Conductivity of Oxide Thin Films Deposited by RF Magnetron Sputtering and Annealed in a Vacuum

“…This results from Schottky contact owing to the oxygen deficient layer. The similarity of ZTO, SnO 2 and ZnO films, annealed in an atmosphere condition to increase high conductivity, was researched in previous work [16]. However, the oxygen vacancy content generated by annealing in a vacuum cannot be similar to the result in an air atmosphere.…”