2008
DOI: 10.1016/j.ijhydene.2008.03.055
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Comprehensive study on hydrogen sensing properties of a Pd–AlGaN-based Schottky diode

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Cited by 32 publications
(7 citation statements)
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“…9 is 14.1 kJ mol −1 . As compared with E a values of Pd/AlGAN/GaN one (25 kJ mol −1 ) and previously reported works [29], the studied MOS device exhibits a lower E a value except for the Pd/InP hydrogen sensor (12.1 kJ mol −1 ). Low activation energy represents that lower energy is required for hydrogen atoms to overcome the barrier for hydrogen adsorption at metal-oxide interface.…”
Section: Resultssupporting
confidence: 72%
“…9 is 14.1 kJ mol −1 . As compared with E a values of Pd/AlGAN/GaN one (25 kJ mol −1 ) and previously reported works [29], the studied MOS device exhibits a lower E a value except for the Pd/InP hydrogen sensor (12.1 kJ mol −1 ). Low activation energy represents that lower energy is required for hydrogen atoms to overcome the barrier for hydrogen adsorption at metal-oxide interface.…”
Section: Resultssupporting
confidence: 72%
“…Reports of various technologies for hydrogen sensing include FETs [1,2], optical fibers [3,4], thermoelectric [5,6], Schottky diodes [7][8][9], surface acoustic wave devices [10,11] and metal oxides [12][13][14][15][16][17]. Metal oxide sensors are under intensive development and have been studied for decades [18,19].…”
Section: Open Accessmentioning
confidence: 99%
“…This could be attributed to the increase of MOS area when the C SiO 2 is increased. It is known that, based on the Schottky diode-type hydrogen sensing mechanism [1,19], f B decreases when hydrogen gas is introduced. Thus, the Schottky barrier height variation Df B is a critical parameter to study hydrogen sensing behaviors.…”
Section: Resultsmentioning
confidence: 99%
“…The adsorbed oxygen molecules result in the formation of hydroxyl and water on the sensor's surface [21]. The response and recovery time constants, i.e., t a and t b , are defined as the time needed for the current to reach 1Àe À1 (63%) of the final steady-state level from the original baseline one [1,14]. Fig.…”
Section: Resultsmentioning
confidence: 99%
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