Effect of Atmosphere Temperature on Physical Properties of ZnO/Ag/ZnO on PET Films

Abstract:

Transparent conductive layers on flexible substrates are important components of today’s optoelectronic technology. They are used in filters for plasma displays, low-e windows, solar cells, etc. At present, in-doped indium oxide (ITO) layers on PET substrate is the predominant transparent conducting oxide film in diverse practical applications. However, ITO is a relatively expensive material because indium is not abundant, but aluminum-doped zinc oxide (AZO) film is emerging as an alternative potential candidate to ITO thin film due to its abundance as a raw material, nontoxic nature, cost-effectiveness, easy fabrication, and good stability in plasma. They have, however, several drawbacks: they exhibit relatively high electrical resistance (sheet resistance, 20-200Ω), considerable emissivity, and significant absorption in the spectral region 1-2μm, in which transition from high transmittance to high reflectance takes place. Furthermore, these films do not block solar thermal radiation (0.7-3μm), which may cause overheating problems to devices such as electro-chromic and photovoltaic devices. On the other hand, ITO/Ag/ITO multilayer films are used to achieve high transparent conducting properties. A thin silver layer of about 10nm thickness is embedded between two ITO layers. The ITO/Ag/ITO film has very low sheet resistance, high optical transparency in the visible range, relatively lower thickness than single-layered ITO film, and better durability than single-layered silver film. In terms of ZnO, which is a wide direct band-gap semiconductor, ZnO has a band-gap energy of 3.37 eV with a binding energy as high as 60 meV at room temperature. ZnO has been applied to various domains for excellent physical and chemical properties, such as piezoelectric sensors, rheostats , gas sensors, semiconductor lasers, and transparent conductive films.

• Periodical: Advanced Materials Research (Volume 988)
• Pages: 125-129
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.988.125
• Online since: July 2014
• Authors: Yun Hae Kim, Jin Woo Lee, Riichi Murakami, Dong Myung Lee, Jin Cheol Ha, Pang Pang Wang
• Keywords: Atmosphere Temperature, PET Films, Physical Properties, Thin Film, Zinc Oxide

References

[1] B. Michel, C. Christoph, Surface & Coatings Technology 200, pp.932-935(2005).

[2] H. Cztenastek, Opto-Electronics Review, 12 pp.49-52(2004).

[3] G. Leftheriotis, S Papaefthimiou, P. Yianoulis, Solid State Ionics 136, pp.655-661(2000).

[4] Young Ran Park, Kwang Joo Kim. Solid State Communications, 123, pp.147-150(2002).

[5] V. Assuncao, E. Fortunato, A. Marques, H. Aguas, Thin Solid Films, 427, pp.401-405(2003).

[6] D. H Kim, R. I Murakami and Y. H Kim, Advanced Materials Research Vols. 97-101, pp.1768-1771(2010).

[7] Li X K, Li Q S and Liang D C, Sci China Ser E-Tech Sci, pp.2779-2784(2009).

[8] Yan Jinliang, SUN Xueqing, ZHU youliang and ZHAO Yinnv, Proc. Of SPIE Vol. 6624, 662313(2008).

[9] Y. H. Kim, Y. D. Jo, R. Murakami, Inter. J. Ocean System Engng, Vol. 1, No. 1, pp.9-15(2011).

[10] Y. H. Kim, J. M. Park, S. W. Yoon, J. W. Lee, M. K. Jung, R. Murakami, Inetr. J. Ocean Engng, Vol. 1, No. 3, pp.148-154(2011).