Synthesizing SnO2 thin films and characterizing sensing performances

Takeshi Ohgaki, Ryota Matsuoka, Ken Watanabe, Kenji Matsumoto, Yutaka Adachi, Isao Sakaguchi, Shunichi Hishita, Naoki Ohashi, Hajime Haneda

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

SnO2 thin films were grown on silica glass substrates using the pulsed laser deposition (PLD) method, and their structures, electric properties, and sensor performances were examined to investigate the sensing mechanism of thin-film gas sensors. Single-phase SnO2 films with rutile-type structures were obtained at 650 °C. All the SnO2 films had many columnar grains, and the grain size increased with film thickness. Measurements of the Hall coefficient at room temperature revealed that the Hall mobility of the films was independent of the film thickness. In contrast, the sensing performances of the films for NO2 and H2 gases respectively in an air atmosphere drastically improved for film thicknesses under 100 nm. These results for the film properties and sensing performances of SnO2 thin films are discussed in terms of a space-charge layer formed on the columnar grains.

Original languageEnglish
Pages (from-to)99-104
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume150
Issue number1
DOIs
Publication statusPublished - Oct 21 2010
Externally publishedYes

Fingerprint

Thin films
Film thickness
thin films
film thickness
Hall mobility
sensors
silica glass
Fused silica
Pulsed laser deposition
Chemical sensors
Electric space charge
gases
rutile
pulsed laser deposition
Hall effect
space charge
Electric properties
grain size
Gases
atmospheres

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Ohgaki, T., Matsuoka, R., Watanabe, K., Matsumoto, K., Adachi, Y., Sakaguchi, I., ... Haneda, H. (2010). Synthesizing SnO2 thin films and characterizing sensing performances. Sensors and Actuators, B: Chemical, 150(1), 99-104. https://doi.org/10.1016/j.snb.2010.07.036

Synthesizing SnO2 thin films and characterizing sensing performances. / Ohgaki, Takeshi; Matsuoka, Ryota; Watanabe, Ken; Matsumoto, Kenji; Adachi, Yutaka; Sakaguchi, Isao; Hishita, Shunichi; Ohashi, Naoki; Haneda, Hajime.

In: Sensors and Actuators, B: Chemical, Vol. 150, No. 1, 21.10.2010, p. 99-104.

Research output: Contribution to journalArticle

Ohgaki, T, Matsuoka, R, Watanabe, K, Matsumoto, K, Adachi, Y, Sakaguchi, I, Hishita, S, Ohashi, N & Haneda, H 2010, 'Synthesizing SnO2 thin films and characterizing sensing performances', Sensors and Actuators, B: Chemical, vol. 150, no. 1, pp. 99-104. https://doi.org/10.1016/j.snb.2010.07.036
Ohgaki, Takeshi ; Matsuoka, Ryota ; Watanabe, Ken ; Matsumoto, Kenji ; Adachi, Yutaka ; Sakaguchi, Isao ; Hishita, Shunichi ; Ohashi, Naoki ; Haneda, Hajime. / Synthesizing SnO2 thin films and characterizing sensing performances. In: Sensors and Actuators, B: Chemical. 2010 ; Vol. 150, No. 1. pp. 99-104.
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