Formaldehyde assisted reduction achieved p-type orthorhombic tin oxide film prepared by an inexpensive chemical method

Jian Sun, Zequn Chen, Sha Nie, Zhigen Yu, Shenghui Yan, Hao Gong, Chunhua Tang, Xue Bai, Jianmei Xu, Ling Zhao, Wei Zhou, Qing Wang

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The fabrication of tin oxide thin film of orthorhombic phase has been succeeded under the high pressures from 1.5 GPa to 50 GPa. In this paper, we demonstrate the viability of p-type tin oxide thin film at atmosphere pressure of 0.1 MPa, by a chemical method employing formaldehyde (HCHO) during the annealing process. By using formaldehyde to form formaldehyde-argon mixed reducing ambiance in the chemical sol-gel process, limited oxidation is reached and p-type tin oxide films of orthorhombic phase under ambient pressure are eventually achieved under optimized experimental conditions. Specifically, we have developed a p-type tin oxide thin film with an optimal Hall mobility of 8.6 cm2 V-1 s-1. Besides, our results reveal that a Sn rich environment can lead to a higher hole mobility experimentally.

Original languageEnglish (US)
Article number116411
JournalMaterials Research Express
Volume4
Issue number11
DOIs
StatePublished - Nov 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

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