Effects of Annealing Environments on the Solution-Grown, Aligned Aluminium-Doped Zinc Oxide Nanorod-Array-Based Ultraviolet Photoconductive Sensor
Joint Authors
Rusop, M.
Mamat, Mohamad Hafiz
Che Khalin, Mohd Izzudin
Nik Mohammad, Nik Noor Hafizah
Khusaimi, Zuraida
Md Sin, Nor Diyana
Shariffudin, Shafinaz Sobihana
Mohamed Zahidi, Musa
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-10-04
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
We have fabricated metal-semiconductor-metal- (MSM-) type ultraviolet (UV) photoconductive sensors using aluminium- (Al-) doped zinc oxide (ZnO) nanorod arrays that were annealed in different environments: air, oxygen, or a vacuum.
The Al-doped ZnO nanorods had an average diameter of 60 nm with a thickness of approximately 600 nm that included the seed layer (with thickness ~200 nm).
Our results show that the vacuum-annealed nanorod-array-based UV photoconductive sensor has the highest photocurrent value of 2.43 × 10-4 A.
The high photocurrent is due to the high concentration of zinc (Zn) interstitials in the vacuum-annealed nanorod arrays.
In contrast, the oxygen-annealing process applied to the Al-doped ZnO nanorod arrays produced highly sensitive UV photoconductive sensors, in which the sensitivity reached 55.6, due to the surface properties of the oxygen-annealed nanorods, which have a higher affinity for oxygen adsorption than the other samples and were thereby capable of reducing the sensor’s dark current.
In addition, the sensor fabricated using the oxygen-annealed nanorod arrays had the lowest rise and decay time constants.
Our result shows that the annealing environment greatly affects the surface condition and properties of the Al-doped ZnO nanorod arrays, which influences the performance of the UV photoconductive sensors.
American Psychological Association (APA)
Mamat, Mohamad Hafiz& Che Khalin, Mohd Izzudin& Nik Mohammad, Nik Noor Hafizah& Khusaimi, Zuraida& Md Sin, Nor Diyana& Shariffudin, Shafinaz Sobihana…[et al.]. 2012. Effects of Annealing Environments on the Solution-Grown, Aligned Aluminium-Doped Zinc Oxide Nanorod-Array-Based Ultraviolet Photoconductive Sensor. Journal of Nanomaterials،Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-997297
Modern Language Association (MLA)
Mamat, Mohamad Hafiz…[et al.]. Effects of Annealing Environments on the Solution-Grown, Aligned Aluminium-Doped Zinc Oxide Nanorod-Array-Based Ultraviolet Photoconductive Sensor. Journal of Nanomaterials No. 2012 (2012), pp.1-15.
https://search.emarefa.net/detail/BIM-997297
American Medical Association (AMA)
Mamat, Mohamad Hafiz& Che Khalin, Mohd Izzudin& Nik Mohammad, Nik Noor Hafizah& Khusaimi, Zuraida& Md Sin, Nor Diyana& Shariffudin, Shafinaz Sobihana…[et al.]. Effects of Annealing Environments on the Solution-Grown, Aligned Aluminium-Doped Zinc Oxide Nanorod-Array-Based Ultraviolet Photoconductive Sensor. Journal of Nanomaterials. 2012. Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-997297
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-997297