Heated air sensitivity of Zn1-xCdxO films

Author(s):Show less -

Vieira, C. E. R. F. ^[1] ; Soares, D. A. W. ^[1] ; de Godoy, M. P. F. ^[2] ; da Silva, M. J. ^[1] ; Vargas, L. M. B. ^[1] ; Alves, D. C. ^[1] ; Pena, F. S. ^[1] ; Holgado, D. P. A. ^[1] ; Okazaki, A. K. ^[3] ; Rappl, P. H. O. ^[3] ; Abramof, E. ^[3] ; Peres, M. L. ^[1]

Affiliation

^[1] Univ Fed Itajuba, Inst Fis & Quim, BR-37500903 Itajuba, MG - Brazil

^[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

^[3] Inst Nacl Pesquisas Espaciais, Lab Associado Sensores & Mat, BR-12227010 Sao Jose Dos Campos, SP - Brazil

• Document type: Journal article
• Source: Materials Research Bulletin; v. 138, JUN 2021.
• Web of Science Citations: 0

Abstract

In this work, we have investigated the heat sensitivity of a Zn1-xCdxO (x= 0.03-1) films obtained by spraypyrolysis under the influence of atmospheric air, considering the substrate type, air temperature, and Cd concentration. We found a transition in the electrical conductivity behavior when x is around 0.55 (55 at.% Cd). This transition is related to the structural phase transition that also occurs close to this concentration. It has been proved that the thermal response amplitude is directly related to the surface morphology of films, which depends on the substrate type and the Cd concentration. We found that thermal sensitivity and signal quality are higher for samples grown on top of Si substrates. The conductivity changes are reproducible over a strategic temperature range (50-100 degrees C), making the films available for practical applications. (AU)

• FAPESP's process: 16/10973-4 - Defects and their features in semiconductor oxides films produced by spray-pyrolysis technique
• Grantee: Marcio Peron Franco de Godoy
• Support Opportunities: Regular Research Grants