Effect of different deposition techniques of PCDTBT:PC<inf>71</inf>BM composite on the performance of capacitive-type humidity sensors

Abu Bakar, NA; Ali, S; Hisamuddin, SN; Supangat, A; Langford, SJ; Roslan, NA

Effect of different deposition techniques of PCDTBT:PC<inf>71</inf>BM composite on the performance of capacitive-type humidity sensors

Abu Bakar, NA Ali, S Hisamuddin, SN Supangat, A Langford, SJ Roslan, NA

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Synthetic Metals, 2022, 285, pp. 117020
Issue Date:: 2022-04-01

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Field	Value	Language
dc.contributor.author	Abu Bakar, NA
dc.contributor.author	Ali, S
dc.contributor.author	Hisamuddin, SN
dc.contributor.author	Supangat, A
dc.contributor.author	Langford, SJ
dc.contributor.author	Roslan, NA
dc.date.accessioned	2023-02-03T03:29:15Z
dc.date.available	2023-02-03T03:29:15Z
dc.date.issued	2022-04-01
dc.identifier.citation	Synthetic Metals, 2022, 285, pp. 117020
dc.identifier.issn	0379-6779
dc.identifier.uri	http://hdl.handle.net/10453/165883
dc.description.abstract	The performance and hence pragmatic use of organic humidity sensors requires various factors to be addressed outside of progress in high-performance organic-based sensing materials. While important, evaluation of fabrication techniques also requires attention to optimise performance. Herein we report the effect of different application techniques on the humidity sensing performance of poly[N-90-heptadecanyl-2,7-carbazole-alt-5,5-(40,70-di-2-thienyl-20,10,30-benzothiadiazole)] (PCDTBT) and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) organic composites. Spin-coating, immersion and drop-casting techniques have been applied to prepare sensors. Field-emission scanning electronic microscopy (FESEM) analysis of the prepared films revealed different types of self-assembled nanorods and nanotubes to be formed. The morphological and self-assembled differences could be attributed to various crystallisation processes as a result of different deposition techniques. Capacitive responses of all three sensors have been studied as a function of relative humidity at room temperature. PCDTBT:PC71BM composites prepared through the immersion technique showed superior sensing performance including higher sensitivity (62.34 pF/%RH) than sensors prepared through the spin coating (0.2 pF/%RH) and drop-casting (7.5 pF/%RH) techniques. The superior sensing performance of the sensor prepared through the immersion technique can be ascribed to both the nanotube and porous morphology exhibited.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Synthetic Metals
dc.relation.isbasedon	10.1016/j.synthmet.2022.117020
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0204 Condensed Matter Physics, 0912 Materials Engineering
dc.subject.classification	Applied Physics
dc.title	Effect of different deposition techniques of PCDTBT:PC<inf>71</inf>BM composite on the performance of capacitive-type humidity sensors
dc.type	Journal Article
utslib.citation.volume	285
utslib.for	0204 Condensed Matter Physics
utslib.for	0912 Materials Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	closed_access	*
dc.date.updated	2023-02-03T03:29:13Z
pubs.publication-status	Published
pubs.volume	285

Abstract:

The performance and hence pragmatic use of organic humidity sensors requires various factors to be addressed outside of progress in high-performance organic-based sensing materials. While important, evaluation of fabrication techniques also requires attention to optimise performance. Herein we report the effect of different application techniques on the humidity sensing performance of poly[N-90-heptadecanyl-2,7-carbazole-alt-5,5-(40,70-di-2-thienyl-20,10,30-benzothiadiazole)] (PCDTBT) and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) organic composites. Spin-coating, immersion and drop-casting techniques have been applied to prepare sensors. Field-emission scanning electronic microscopy (FESEM) analysis of the prepared films revealed different types of self-assembled nanorods and nanotubes to be formed. The morphological and self-assembled differences could be attributed to various crystallisation processes as a result of different deposition techniques. Capacitive responses of all three sensors have been studied as a function of relative humidity at room temperature. PCDTBT:PC71BM composites prepared through the immersion technique showed superior sensing performance including higher sensitivity (62.34 pF/%RH) than sensors prepared through the spin coating (0.2 pF/%RH) and drop-casting (7.5 pF/%RH) techniques. The superior sensing performance of the sensor prepared through the immersion technique can be ascribed to both the nanotube and porous morphology exhibited.

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http://hdl.handle.net/10453/165883