Hydrogen sensing performance of a Pd nanoparticle/Pd film/GaN-based diode

Huey-Ing Chen, Yu Chih Cheng, Ching Hong Chang, Wei Cheng Chen, I-Ping Liu, Kun Wei Lin, Wen-Chau Liu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A new Pd nanoparticle (NP)/Pd film/GaN-based Schottky diode-type hydrogen sensor is fabricated and studied. Pd NPs are formed using a proper photochemical approach based on a drop of PdCl2 solution and UV illumination. Experimentally, excellent hydrogen sensing performance, including an extremely high sensing response (4.2 × 106@1% H2/air gas) with a very low detection limit (≤0.8 ppm H2/air) is obtained at 25 °C. This is mainly caused by the enhanced surface area/volume ratio of the Pd NPs and the catalytic reactivity of the Pd film. Furthermore, the studied device exhibits sensitive responses to humid ambiences at 25 °C. Therefore, based on the reported benefits and relatively simple process flow, the studied device is a promising high-performance hydrogen sensor.

Original languageEnglish
Pages (from-to)514-519
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume247
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Hydrogen
Diodes
diodes
Nanoparticles
nanoparticles
hydrogen
ambience
sensors
air
Sensors
Air
Schottky diodes
reactivity
Lighting
Gases
illumination
gases
palladium chloride

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

Chen, Huey-Ing ; Cheng, Yu Chih ; Chang, Ching Hong ; Chen, Wei Cheng ; Liu, I-Ping ; Lin, Kun Wei ; Liu, Wen-Chau. / Hydrogen sensing performance of a Pd nanoparticle/Pd film/GaN-based diode. In: Sensors and Actuators, B: Chemical. 2017 ; Vol. 247. pp. 514-519.
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Hydrogen sensing performance of a Pd nanoparticle/Pd film/GaN-based diode. / Chen, Huey-Ing; Cheng, Yu Chih; Chang, Ching Hong; Chen, Wei Cheng; Liu, I-Ping; Lin, Kun Wei; Liu, Wen-Chau.

In: Sensors and Actuators, B: Chemical, Vol. 247, 01.01.2017, p. 514-519.

Research output: Contribution to journalArticle

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T1 - Hydrogen sensing performance of a Pd nanoparticle/Pd film/GaN-based diode

AU - Chen, Huey-Ing

AU - Cheng, Yu Chih

AU - Chang, Ching Hong

AU - Chen, Wei Cheng

AU - Liu, I-Ping

AU - Lin, Kun Wei

AU - Liu, Wen-Chau

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AB - A new Pd nanoparticle (NP)/Pd film/GaN-based Schottky diode-type hydrogen sensor is fabricated and studied. Pd NPs are formed using a proper photochemical approach based on a drop of PdCl2 solution and UV illumination. Experimentally, excellent hydrogen sensing performance, including an extremely high sensing response (4.2 × 106@1% H2/air gas) with a very low detection limit (≤0.8 ppm H2/air) is obtained at 25 °C. This is mainly caused by the enhanced surface area/volume ratio of the Pd NPs and the catalytic reactivity of the Pd film. Furthermore, the studied device exhibits sensitive responses to humid ambiences at 25 °C. Therefore, based on the reported benefits and relatively simple process flow, the studied device is a promising high-performance hydrogen sensor.

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