NDLI: Damp heat stability of AZO transparent electrode and influence of thin metal film for enhancing the stability

Content Provider	Springer Nature Link
Author	Tabassum, Samia Yamasue, Eiji Okumura, Hideyuki Ishihara, Keiichi N.
Copyright Year	2014
Abstract	The electrical properties of Aluminum doped ZnO (AZO) thin films prepared by sol–gel method were investigated as a function of annealing atmosphere (vacuum, argon +5 % hydrogen and pure hydrogen) and doping concentration (1, 2, 3 and 4 wt%). An optimal annealing atmosphere (pure hydrogen) and doping concentration (2 wt%) was obtained with a minimum resistivity of 1.6 × 10$^{−3}$ Ω cm. The structural, optical and electrical stability has been investigated by a damp-heat test in an environment with 85 % relative humidity at 85 °C. The degradation of the electrical film properties was due to the decrease of carrier concentration and mobility, whereas, no significant change was observed for structural and optical properties. The thin metallic layer (Ti or Cr) was deposited on AZO by sputtering to prevent the penetration of oxygen and water into film thus increasing the electrical stability. Oxide layer of metal was formed on surface when it comes to air at room temperature which was confirmed by X-ray photoelectron spectroscopy and thus a bi-layer of metal/metal oxide layer on AZO film enhances the electrical stability.
Starting Page	3203
Ending Page	3208
Page Count	6
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	25
Issue Number	7
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2014-05-30
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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