Thermally evaporated vanadium-based phthalocyanine for low moisture detection in humidity sensors

Natashah, Fadlan Arif and Lin, Chong Jeng and Hishamuddin, Syaza Nafisah and Coffey, Aidan H. and Zhu, Chenhui and Bawazeer, Tahani M. and Alsoufi, Mohammad S. and Roslan, Nur Adilah and Supangat, Azzuliani (2024) Thermally evaporated vanadium-based phthalocyanine for low moisture detection in humidity sensors. Materials Today Communications, 38. p. 108033. ISSN 2352-4928, DOI https://doi.org/10.1016/j.mtcomm.2024.108033.

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Official URL: https://doi.org/10.1016/j.mtcomm.2024.108033

Abstract

Aluminium / vanadyl 3,10,17,24-tetra-tert-butyl-1,8,15,22-tetrakis(dimethylamino)- 29 H,31 H-phthalocyanine (VTP) / Aluminium, (Al/VTP/Al) has been successfully studied for capacitive humidity sensing. The metalcontaining vanadium central atom in the metal phthalocyanine has contributed towards excellent capacitance response at low humidity conditions as low as 10%RH. In addition, high surface roughness revealed by atomic force microscopy (AFM) images has also given insight into the low hysteresis lag. The film's large surface area helped prevent the water molecules from accumulating in the VTP pores and capillaries. Grazing-incidence wide and small-angle X-ray scattering (GIWAXS-GISAXS) indicates some face-on crystallite orientation produced by the partially ordered film, impacting the transient performance of the sensor.

Item Type: Article
Funders: UNSPECIFIED
Uncontrolled Keywords: Electrical properties; X-ray techniques; Physical vapour deposition; Organic; Humidity sensors
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 12 Nov 2024 02:25
Last Modified: 12 Nov 2024 02:25
URI: http://eprints.um.edu.my/id/eprint/45783

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