Fatima, Noshin and Lim, Lih Wei and Bukhari, Sarah and Raza, Ehsan and Aziz, Fakhra and Shah, Zarbad and Ahmad, Zubair and Kamboh, Afzal and Tahir, Muhammad and Yakuphanoglu, Fahrettin and Supangat, Azzuliani and Sulaiman, Khaulah (2024) Impact of Compositional Engineering on PTB7-Th:PC71BM Capacitive Humidity Sensor Performance. Journal of Electronic Materials, 53 (11, SI). pp. 6671-6678. ISSN 0361-5235, DOI https://doi.org/10.1007/s11664-024-11337-w.
Full text not available from this repository.Abstract
The current investigation focuses on the development of capacitive humidity sensors utilizing an organic polymer blend of poly4,8-bis(5-(2-ethylhexyl)thiophene-2-yl)benzo1,2-b;4,5-b `]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno3,4-b]thio phene-)-2-carboxylate-2-6-diyl)] (PTB7-Th) and 6,6]-phenyl-C71-butyric-acid methyl ester (PC71BM), which were successfully achieved. A cost-effective spin-coating technique was employed to produce surface-type sensors in the Al/PTB7-Th:PC71BM/Al horizontal geometry. The investigation focuses on the capacitive behavior of the devices under ambient conditions, specifically at room temperature. The devices are subjected to an alternating current operational bias of 1 V, while the relative humidity (RH) is varied within the range of 20-95%. The sensors are examined at frequencies of 100 Hz, 1 kHz, 10 kHz, and 100 kHz. Specifically, the sensors demonstrate improved sensitivity to changes in capacitance in relation to relative humidity when operating at a frequency of 100 Hz. In addition, an optimal volumetric ratio of 1.5:1 is selected for PTB7-Th to PC71BM. The optimized composite sensor demonstrates superior performance, exhibiting minimal hysteresis of 6.16% and significant sensitivity of 1.58 pF/% RH. In addition, response and recovery times of 2 s and 3 s, respectively, are obtained. The results of investigations demonstrate that the composite sensor exhibits significant improvements in sensing parameters compared to single-material sensors. As a result, the composite sensor has great potential for use in advanced sensor applications, especially in the education sector in underdeveloped countries.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya, Higher Education Commission of Pakistan |
| Uncontrolled Keywords: | Capacitance; humidity sensor; organic semiconductor; polymer composite; surface-type |
| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 07 Apr 2025 03:40 |
| Last Modified: | 07 Apr 2025 03:40 |
| URI: | http://eprints.um.edu.my/id/eprint/46758 |
Actions (login required)
 |
View Item |
