Temperature-dependent hydrogen sensing characteristics of a new Pt/InAlAs Schottky diode-type sensor

Ching Wen Hung, Tsung Han Tsai, Huey-Ing Chen, Yan Ying Tsai, Tzu Pin Chen, Li Yang Chen, Kuei Yi Chu, Wen-Chau Liu

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

By combining the advantages of a catalytic Pt metal with an InAlAs material system, an interesting hydrogen sensor is fabricated and demonstrated. The Pt/InAlAs Schottky diode-type sensor exhibits high sensing performance toward hydrogen gas. A comparative study between forward and reverse biases is presented. A simple detection model is proposed to elucidate the hydrogen sensing behavior under forward and reverse biases. Thermionic emission (TE) and field emission (FE) exhibit considerable influences on the hydrogen sensing properties. Moreover, the temperature-dependent hydrogen detection characteristics are presented and studied. High sensor response is observed under reverse voltage, while large current variation is found under forward voltage. It is worth to note that this sensor shows a widespread reverse voltage-operating regime (0 to -5 V) with stable and flat sensing curves. The effective Schottky barrier height change and the series resistance variation, from the Norde plots, are -87.0 meV and -288 Ω, respectively, in 10,000 ppm H2/air at 303 K. Based on the significant advantage of integration compatibility with InP-based electronic devices, the studied device reveals the promise in smart sensor and micro-electro-mechanical system (MEMS) applications.

Original languageEnglish
Pages (from-to)574-580
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume128
Issue number2
DOIs
Publication statusPublished - 2008 Jan 15

Fingerprint

Schottky diodes
Hydrogen
Diodes
sensors
Sensors
hydrogen
Electric potential
Temperature
temperature
electric potential
Thermionic emission
Smart sensors
Field emission
thermionic emission
compatibility
Gases
Metals
field emission
plots
Air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Hung, Ching Wen ; Tsai, Tsung Han ; Chen, Huey-Ing ; Tsai, Yan Ying ; Chen, Tzu Pin ; Chen, Li Yang ; Chu, Kuei Yi ; Liu, Wen-Chau. / Temperature-dependent hydrogen sensing characteristics of a new Pt/InAlAs Schottky diode-type sensor. In: Sensors and Actuators, B: Chemical. 2008 ; Vol. 128, No. 2. pp. 574-580.
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Temperature-dependent hydrogen sensing characteristics of a new Pt/InAlAs Schottky diode-type sensor. / Hung, Ching Wen; Tsai, Tsung Han; Chen, Huey-Ing; Tsai, Yan Ying; Chen, Tzu Pin; Chen, Li Yang; Chu, Kuei Yi; Liu, Wen-Chau.

In: Sensors and Actuators, B: Chemical, Vol. 128, No. 2, 15.01.2008, p. 574-580.

Research output: Contribution to journalArticle

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