Mohamad, Mazuina and Fong, Yee Meng and Hashim, Abdul Manaf (2008) The sensing performance of undoped-AlGaN/GaN/sapphire HEMT hydrogen gas sensor. In: Proceedings- 2nd Asia International on Modelling and Simulation,AMS 2008, 13-15 May 2008.
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Official URL: http://dx.doi.org/10.1109/AMS.2008.184
Abstract
The hydrogen sensing characteristics of undoped-AlGaN/GaN/sapphire circular Schottky diodes are systematically studied and compared over wide hydrogen concentration and temperature ranges. High purity hydrogen gas was exposed to the sample together with the ambient gas of either air or pure nitrogen or without ambient gas (vacuum) at pressure in the range of 50 Torr to 200 Torr was used for both types of ambient gases. The sensing characteristics at different hydrogen concentration are investigated. The sensitivity to hydrogen gas was also investigated in dependence of various catalytic metals thickness and operating temperatures.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | Catalytic metal, sdensor, wide bandgap |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Electrical Engineering |
| ID Code: | 7617 |
| Deposited By: | Maznira Sylvia Azra Mansor |
| Deposited On: | 12 Jan 2009 04:49 |
| Last Modified: | 09 Oct 2017 07:33 |
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