Investigation of optical and humidity-sensing properties of vanadyl phthalocyanine-derivative thin films

F. Aziz, K. Sulaiman, K. S. Karimov, M. R. Muhammad, M. H. Sayyad, Burhanuddin Yeop Majlis

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In this study an active layer of Vanadyl 2,9,16,23-tetraphenoxy-29H,31H- phthalocyanine (VOPcPhO) has been employed in surface type humidity sensor. On top of preliminary deposited asymmetric metal electrodes, a VOPcPhO thin film was spun cast to obtain a surface type Al/VOPcPhO/Au sensor. The gap between the electrodes was 40 um. A solution of 30mg/ml was deposited at 3000rpm. The thickness of the VOPcPhO film was 150nm. The capacitive effect of the sample was evaluated in the relative humidity range 0-87%RH, at room temperature. It was observed that the capacitance of the sensor increases 10times under the effect of entire humidity range in the relative humidity level. The optical properties of VOPcPhO thin film were also investigated. The humidity-dependent capacitive properties make the sensor suitable for the application in the instruments used for environmental monitoring of humidity.

Original languageEnglish
Pages (from-to)22-32
Number of pages11
JournalMolecular Crystals and Liquid Crystals
Volume566
Issue number1
DOIs
Publication statusPublished - 1 Nov 2012

Fingerprint

Vanadates
humidity
Atmospheric humidity
Derivatives
Thin films
thin films
sensors
Sensors
Humidity sensors
Electrodes
environmental monitoring
electrodes
Capacitance
Optical properties
Metals
phthalocyanine
casts
capacitance
Monitoring
optical properties

Keywords

  • humidity sensor
  • UV/Vis spectroscopy
  • Vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Investigation of optical and humidity-sensing properties of vanadyl phthalocyanine-derivative thin films. / Aziz, F.; Sulaiman, K.; Karimov, K. S.; Muhammad, M. R.; Sayyad, M. H.; Yeop Majlis, Burhanuddin.

In: Molecular Crystals and Liquid Crystals, Vol. 566, No. 1, 01.11.2012, p. 22-32.

Research output: Contribution to journalArticle

Aziz, F. ; Sulaiman, K. ; Karimov, K. S. ; Muhammad, M. R. ; Sayyad, M. H. ; Yeop Majlis, Burhanuddin. / Investigation of optical and humidity-sensing properties of vanadyl phthalocyanine-derivative thin films. In: Molecular Crystals and Liquid Crystals. 2012 ; Vol. 566, No. 1. pp. 22-32.
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