High Selectivity Hydrogen Gas Sensor Based on WO(3)/Pd-AlGaN/GaN HEMTs.
High Selectivity Hydrogen Gas Sensor Based on WO(3)/Pd-AlGaN/GaN HEMTs.
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DOI:
10.3390/s23073465
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发表时间:
2023-03-26
期刊:
影响因子:
--
通讯作者:
Kim H
中科院分区:
文献类型:
--
作者:
Nguyen VC;Cha HY;Kim H
We investigated the hydrogen gas sensors based on AlGaN/GaN high electron mobility transistors (HEMTs) for high temperature sensing operation. The gate area of the sensor was functionalized using a 10 nm Pd catalyst layer for hydrogen gas sensing. A thin WO3 layer was deposited on top of the Pd layer to enhance the sensor selectivity toward hydrogen gas. At 200 °C, the sensor exhibited high sensitivity of 658% toward 4%-H2, while exhibiting only a little interaction with NO2, CH4, CO2, NH3, and H2S. From 150 °C to 250 °C, the 10 ppm hydrogen response of the sensor was at least eight times larger than other target gases. These results showed that this sensor is suitable for H2 detection in a complex gas environment at a high temperature.
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影响因子:
6.2
作者:
Cai, Zhicheng;Park, Sunghoon
通讯作者:
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影响因子:
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DOI:
10.3390/nano8110902
发表时间:
2018-11-03
期刊:
Nanomaterials (Basel, Switzerland)
影响因子:
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