Characterization of CdS thin films deposited by chemical bath deposition using novel complexing agents

A. Carrillo-Castillo*, R. C. Ambrosio Lázaro, E. M. Lira Ojeda, C. A. Martínez Pérez, M. A. Quevedo-López, F. S. Aguirre-Tostado

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Cadmium sulfide (CdS) thin films have been deposited by chemical bath deposition (CBD) at 70°C on glass substrates. In order to have a better control of deposition rate in CdS synthesis, Sodium borohydride and hydrazine were demonstrated as novel complexing agents. The structural, optical and electrical characteristics of the CdS thin films obtained were analyzed. Sodium borohydride as complex agent increased the deposition rate while hydrazine reduced the deposition rate due to higher complexation and slow generation of Cd2+ while improving the morphology of CdS films. Homogeneous CdS thin films with hexagonal crystalline structure and energy band gap of 2.4 eV were obtained. The deposited thin films showed a good electrical conductivity with resistivity values in the order of 10-300 Ω-cm, suggesting a low metal-semiconductor contact resistivity as well.

Original languageEnglish
Pages (from-to)421-425
Number of pages5
JournalChalcogenide Letters
Volume10
Issue number10
StatePublished - 2013

Keywords

  • Cadmium sulphide
  • Chemical bath deposition
  • Complexing agent

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