Back
 MSA  Vol.11 No.1 , January 2020
Heat-Resistant Properties of a SiO2-Coated PET Film Prepared by Irradiating a Polysilazane-Coated Film with Excimer Light
Abstract: Flexible electronics have been recently paid much attention. A flexible substrate (Organic resin film) is indispensable component for flexible devices. Though PET film is low-cost organic film, low heat-resistance of PET film limits its application as a flexible device substrate. We have developed heat-resistant PET which does not deteriorate even at 190°C heat treatment for one hour. An excimer light was irradiated onto a polysi-lazane (PHPS: perhydropolysilane)-coated film to form a dense silicon-dioxide (SiO2) layer on a PET film, and the heat-resistance property of the formed film was examined. Changes of surface state and cross-sectional structure of the formed film due to heat treatment were investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). Compared to normal PET, which is deteriorated and whitened by heat treatment of about 110°C - 120°C, the SiO2-coated PET film maintains transparency and does not deteriorate after heat treatment at 180°C - 190°C for one hour. This high heat resistance is due to a dense SiO2 film formed on the surface that prevents surface precipitation and crystallization of low-molecular-weight oligomers (which are the cause of thermal degradation of PET). It is expected that enhancing the heat resistance of PET—which has high versatility and low cost—to about 180°C to 190°C will allow SiO2-film-coated PET to be developed as a film substrate for flexible devices.
Cite this paper: Ohishi, T. , Ichikawa, K. and Isono, S. (2020) Heat-Resistant Properties of a SiO2-Coated PET Film Prepared by Irradiating a Polysilazane-Coated Film with Excimer Light. Materials Sciences and Applications, 11, 58-69. doi: 10.4236/msa.2020.111005.
References

[1]   Wong, W.S. and Salleo, A. (2009) Flexible Electronics: Materials and Applications. Springer, New York.
https://doi.org/10.1007/978-0-387-74363-9

[2]   White, M.S., Kaitenbrunner, M., Istrokowacki, E.D., Gutnichenko, K., Kettlgruber, G., Graz, I., Aazou, S., Ulbricht, C., Egbe, D.A.M., Miron, M.C., Major, Z., Schaber, M.C., Sekitani, T., Someya, T., Bauer, S. and Sariciftci, N.S. (2013) Ultrathin Highly Flexible and Stretchable PLEDs. Nature Photonics, 7, 811-816.
https://doi.org/10.1038/nphoton.2013.188

[3]   Sekitani, T. and Someya, T. (2011) Human-Friendly Organic Integrated Circuit. Materials Today, 14, 398-407.
https://doi.org/10.1016/S1369-7021(11)70184-5

[4]   Sekitani, T., Zschieschang, U., Klauk, H. and Someya, T. (2010) Flexible Organic Transistor and Circuits with Extreme Bending Stability. Nature Materials, 9, 1015-1022.
https://doi.org/10.1038/nmat2896

[5]   Nomura, K., Ohta, H., Kamiya, T., Hirano, M. and Hosono, H. (2004) Room-Temperature Fabrication of Transparent Flexible Thin-Film Transistors Using Amorphous Oxide Semiconductors. Nature, 432, 488-492.
https://doi.org/10.1038/nature03090

[6]   Sekitani, T. and Someya, T. (2010) Stretchable Large-Area Organic Electronics. Advanced Materials, 22, 2228-2246.
https://doi.org/10.1002/adma.200904054

[7]   Motomura, G., Nakajima, Y., Nakata, M., Takei, T., Yamamoto, T., Kurita, T. and Shimizu, N. (2014) Flexible Organic Light Emitting Diode Display on an Ultra-Thin Polyimide Film. The Journal of the Institute of Electronics, Information and Communication Engineers C, J97-C, 61-68.

[8]   Nakajima, Y., Fujisaki, Y., Takei, T., Sato, H., Nakata, M., Suzuki, M., Fukagawa, H., Motomura, G., Shimizu, T., Isogai, Y., Sugirani, K., Katoh, T., Tokito, T., Yamamoto, T. and Fujikake, H. (2011) Low Temperature Fabrication of 5-in QVGA Flexible AMOLED Display Driven by OTFTs Using Olefin Polymer as the Gate Insulator. Journal of the Society for Information Display, 19, 861-866.

[9]   Park, J., Kim, T., Stryakhilev, D., Lee, D., Mo, Y.G., Jin, D. and Chung, H.K. (2009) Flexible Full Color Organic Light-Emitting Diode Display on Polyimide Plastic Substrate Driven by Amorohous Indium Gallium Zinc Oxide Thin-Film Transistor. Applied Physics Letters, 95, Article ID: 013503.
https://doi.org/10.1063/1.3159832

[10]   Chien, C., Wu, C., Tsai, Y., Kung, Y., Lin, C., Hsu, P., Hsieh, H., Wu, C., Yeh, Y., Leu, C. and Lee, T. (2011) High Performance Flexible a-IGZO TFTs Adopting Stacked Electrodes and Transparent Polyimide-Based Nanocomposite Substrate. IEEE Transactions on Electron Devices, 58, 1440-1446.
https://doi.org/10.1109/TED.2011.2109041

[11]   Imamura, Y., Takeda, K. and Nitta, A. (2019) An Improvement of Homogeneity for Organic Transparent Conductive Film Prepared by Inkjet Printing. The Journal of the Institute of Electronics, Information and Communication Engineers C, J102-C, 77-85.

[12]   Ohishi, T., Sone, S. and Yanagida, K. (2014) Preparation and Gas Barrier Characteristics of Polysilazane-Derived Silica Thin Films Using Ultraviolet Irradiation. Materials Sciences and Applications, 5, 105-111.
https://doi.org/10.4236/msa.2014.53015

[13]   Ohishi, T., Yamazaki, Y. and Nabatame, T. (2016) Preparation, Structure and Gas Barrier Characteristics of Polysilazane-Derived Silica Thin Film Formed on PET by Simultaneously Applying Ultraviolet-Irradiation and Heat-Treatment. Frontiers in Nanoscience and Nanotechnology, 2, 149-154.
https://doi.org/10.15761/FNN.1000126

[14]   Ohishi, T. and Yanagida, K. (2016) Preparation and Gas Barrier Characteristics of Polysilazane-Derived Multi-Layered Silica Thin Films Formed on Alycyclic Polyimide Film Using Ultraviolet Irradiation. Frontiers in Nanoscience and Nanotechnology, 2, 173-178.
https://doi.org/10.15761/FNN.1000131

[15]   Cimecioglu, A.L., Zeronian, S.H., Alger, K.W., Collins, M.J. and East, G.C. (1986) Properties of Oligomers Present in Poly(Ethylene Terephthalate). Journal of Applied Polymer Science, 32, 4719-4733.
https://doi.org/10.1002/app.1986.070320436

[16]   Yamanaka, Y., Kitagawa, J., Kojima, K. and Nakano, H. (2018) Precipitation Phenomena of Cyclic Oligomers on the Surface of PET Film Laminated Steel Sheet during Wet-Heat Treatment. Journal of the Surface Finishing Society of Japan, 69, 302-307.

 
 
Top