Influence of polymer additional modulating layer on the selectivity performance of organic field-effect transistor based gas sensor

Shijiao Han; Zhirun Li; Xinming Zhuang; Junsheng Yu

doi:10.1117/12.2507350

8 February 2019 Influence of polymer additional modulating layer on the selectivity performance of organic field-effect transistor based gas sensor

Shijiao Han, Zhirun Li, Xinming Zhuang, Junsheng Yu

Author Affiliations +

Proceedings Volume 10843, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging; 108431L (2019) https://doi.org/10.1117/12.2507350
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Organic field-effect transistors (OFETs) using the polymer as the active layer are being intensively developed for flexible electronics including the gas sensor. However, as same as the other kinds of OFET gas sensors, its selectivity is not quite good enough. As we all know, the interfaces, including semiconductor/semiconductor and semiconductor/dielectric, play important roles in gas sensing. In this work, we introduced additional non-conjugated polymer into the polymer active layer, to modulate the selectivity of polymer-based OFET gas sensors to a certain gas. As a result, we can get two kinds of high selective gas sensors based on single polymer OFETs. Both the detection limit, response and selectivity of ammonia and nitrogen dioxide were significantly improved with different non-conjugated polymers, and the device cost was also reduced by a factor of eight as compared to that using pure polymer material. By analyzing the electrical characteristics of OFET sensors and combining with the intrinsic characteristic of the non-conjugated polymers, we systematically studied the mechanism of the performance improvement.

Citation Download Citation

Shijiao Han, Zhirun Li, Xinming Zhuang, and Junsheng Yu "Influence of polymer additional modulating layer on the selectivity performance of organic field-effect transistor based gas sensor", Proc. SPIE 10843, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging, 108431L (8 February 2019); https://doi.org/10.1117/12.2507350

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