Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors
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 repor...
| Main Authors: | , , , , , |
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| Format: | Article |
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Elsevier
2022
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| Online Access: | http://psasir.upm.edu.my/id/eprint/101097/ |
| _version_ | 1848863492132569088 |
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| author | Abu Bakar, Nor Asmaliza Ali, Salman Hisamuddin, Syaza Nafisah Supangat, Azzuliani Langford, Steven J. Roslan, Nur Adilah |
| author_facet | Abu Bakar, Nor Asmaliza Ali, Salman Hisamuddin, Syaza Nafisah Supangat, Azzuliani Langford, Steven J. Roslan, Nur Adilah |
| author_sort | Abu Bakar, Nor Asmaliza |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T13:33:46Z |
| format | Article |
| id | upm-101097 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:33:46Z |
| publishDate | 2022 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1010972023-06-17T23:28:21Z http://psasir.upm.edu.my/id/eprint/101097/ Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors Abu Bakar, Nor Asmaliza Ali, Salman Hisamuddin, Syaza Nafisah Supangat, Azzuliani Langford, Steven J. Roslan, Nur Adilah 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. Elsevier 2022-04 Article PeerReviewed Abu Bakar, Nor Asmaliza and Ali, Salman and Hisamuddin, Syaza Nafisah and Supangat, Azzuliani and Langford, Steven J. and Roslan, Nur Adilah (2022) Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors. Synthetic Metals, 285. art. no. 117020. pp. 1-7. ISSN 0379-6779 https://www.sciencedirect.com/science/article/pii/S0379677922000145 10.1016/j.synthmet.2022.117020 |
| spellingShingle | Abu Bakar, Nor Asmaliza Ali, Salman Hisamuddin, Syaza Nafisah Supangat, Azzuliani Langford, Steven J. Roslan, Nur Adilah Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors |
| title | Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors |
| title_full | Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors |
| title_fullStr | Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors |
| title_full_unstemmed | Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors |
| title_short | Effect of different deposition techniques of PCDTBT: PC71BM composite on the performance of capacitive-type humidity sensors |
| title_sort | effect of different deposition techniques of pcdtbt: pc71bm composite on the performance of capacitive-type humidity sensors |
| url | http://psasir.upm.edu.my/id/eprint/101097/ http://psasir.upm.edu.my/id/eprint/101097/ http://psasir.upm.edu.my/id/eprint/101097/ |