MOCVD of TiO2 thin films from a modified titanium alkoxide precursor

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Sun Ja Kim - , Ruhr University Bochum (Author)
  • Van Son Dang - , Ruhr University Bochum, Vietnam National University, Hanoi (Author)
  • Ke Xu - , Ruhr University Bochum (Author)
  • Davide Barreca - , University of Padua (Author)
  • Chiara Maccato - , University of Padua (Author)
  • Giorgio Carraro - , University of Padua (Author)
  • Raghunandan K. Bhakta - , Ruhr University Bochum (Author)
  • Manuela Winter - , Ruhr University Bochum (Author)
  • Hans Werner Becker - , Ruhr University Bochum (Author)
  • Detlef Rogalla - , Ruhr University Bochum (Author)
  • Cinzia Sada - , University of Padua (Author)
  • Roland A. Fischer - , Ruhr University Bochum (Author)
  • Anjana Devi - , Ruhr University Bochum (Author)

Abstract

A new titanium precursor, [Ti(OPri)2(deacam)2] (deacam = N,N-diethylacetoacetamide), was developed by the reaction of the parent Ti alkoxide with the β-ketoamide. The compound, obtained as a monomeric six-coordinated complex, was used in metal organic chemical vapor deposition (MOCVD) of TiO2 both as a single source precursor (SSP) and in the presence of oxygen. The high thermal stability of [Ti(OPri)2(deacam)2] enabled the fabrication of TiO2 films over a wide temperature range, with steady growth rates between 500 and 800 °C. The microstructure of the obtained systems was analyzed by X-ray diffraction (XRD) and Raman spectroscopy, whereas atomic force microscopy (AFM) and field emission-scanning electron microscopy (FE-SEM) measurements were performed to investigate the surface morphology and nanoorganization. Film composition was investigated by complementary techniques like Rutherford backscattering spectrometry (RBS), nuclear reaction analysis (NRA), X-ray photoelectron spectroscopy (XPS), and secondary ion mass spectrometry (SIMS). The electrical properties of the layers were investigated by performing capacitance voltage (C-V) and leakage current measurements.

Details

Original languageEnglish
Pages (from-to)1563-1570
Number of pages8
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume212
Issue number7
Publication statusPublished - 1 Jul 2015
Peer-reviewedYes
Externally publishedYes