Characterization of Zinc Oxide Thin Film Gas Sensors Fabricated by Pulsed-Laser Deposition

Aidah A. Al-Doori; Awatif S. Jasim

doi:10.2025/gw9y3z76

Article Details

Characterization of Zinc Oxide Thin Film Gas Sensors Fabricated by Pulsed-Laser Deposition

Authors:

Aidah A. Al-Doori | Awatif S. Jasim

Publisher:

Iraqi Journal of Applied Physics

Journal:

Iraqi Journal of Applied Physics Vol.21 Issue 2, pp.223-228

Document Type:

Article

Publication Date:

3/2025

Document Language:

English

Document ID (Org No.):

2001367365

pISSN:

2309-1673

DOI:

10.2025/gw9y3z76

Abstract:

 In this work, pulsed-laser deposition (PLD) technique was used to prepare pure ZnO thin films on glass substrates. All prepared films were polycrystalline with hexagonal structure. The grain size and surface roughness were found to increase with increasing number of laser pulses. Optical properties showed that the films have high transmission in the visible region (>80%), in addition to a decrease in the transmittance with increasing number of laser pulses. The energy gap value was nearly 3.25 eV for all films. Based on the grain size of the film, 400 pulses were selected to make a gas sensor from pure ZnO films. These films showed different responses for sensing NO2 and H2S gases at three different operating temperatures (100, 150, and 200°C). The pure ZnO film sensor showed a sensing sensitivity for NO2 gas of 90.24% with a response time of 25.2 s at an operating temperature of 200°C, while the maximum sensitivity for H2S gas was 22.89% with a response time of 12.6 s at an operating temperature of 150°C.

Article Details

Characterization of Zinc Oxide Thin Film Gas Sensors Fabricated by Pulsed-Laser Deposition

Authors: Aidah A. Al-Doori | Awatif S. Jasim

Publisher: Iraqi Journal of Applied Physics

Journal: Iraqi Journal of Applied Physics Vol.21 Issue 2, pp.223-228

Document Type: Article

Publication Date: 3/2025

Document Language: English

Document ID (Org No.): 2001367365

pISSN: 2309-1673

DOI: 10.2025/gw9y3z76

Issues

Authors:

Aidah A. Al-Doori | Awatif S. Jasim

Publisher:

Iraqi Journal of Applied Physics

Journal:

Iraqi Journal of Applied Physics Vol.21 Issue 2, pp.223-228

Document Type:

Article

Publication Date:

3/2025

Document Language:

English

Document ID (Org No.):

2001367365

pISSN:

2309-1673

DOI:

10.2025/gw9y3z76