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Flexible Audible Display using ITO on PVDF and Its Interface Analysis

Published online by Cambridge University Press:  01 February 2011

Dong-Hee Park ,
Sangyub Ie ,
Byeong-Taek Bae  and
Won-Kook Choi
Dong-Hee Park
Affiliation:
pdmtime@kist.re.kr, Korea institute of science and technology, Seoul, Korea, Republic of
Sangyub Ie
Affiliation:
phantom7@empal.com, Korea institute of science and technology, Seoul, Korea, Republic of
Byeong-Taek Bae
Affiliation:
btbae@hanmail.net, Korea institute of science and technology, Seoul, Korea, Republic of
Won-Kook Choi
Affiliation:
wkchoi@kist.re.kr, Korea institute of science and technology, Seoul, Korea, Republic of
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Abstract

Flexible audible display (FAD) based on PVDF(Poly-vinylidene fluoride) film is researched to combine piezoelectric property with light emitting diode. Indium-Tin-Oxide (ITO) is deposited on PVDF film at low temperature condition with the vacuum web coating. Under the optimized working pressure and the oxygen/argon pressure ratio, ITO on PVDF shows good electrical property of sheet resistance about 120 ohm/sq at 160 nm thickness, good transmittance of 76%, and sound pressure level more than 70 dB. OLED device with Al/LIF/Alq3/ NPB/ 2T-NATA structure is fabricated on ITO/PVDF and shows the turn-on voltage of 3.5 V and the maximum luminescence of 1011.2 cd/cm2 at the driving voltage of 13 V. C-F chemical bondings are measured to decrease in the XPS spectrum of ITO/PVDF interface. This is originated from the bonding scission caused by incident energetic particles, such as sputtered atoms, backscattered Ar ions, and negative O ions during the sputtering and deposition process. These particles have energy, which is simulated by TRIM and is more than 5 eV, enough to cause the scission of C-F bondings with binding energy of 4 eV/atom.

Keywords

displayacousticbonding
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1116: Symposium I – Reliability and Properties of Electronic Devices on Flexible Substrates , 2008 , 1116-I02-03
Copyright
Copyright © Materials Research Society 2009

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References

REFERENCES

1. Betz, R.A., Proceedings of the 6th International Symposium on Electrets, p.214, (1988)Google Scholar
2. Paradiso, J. A., IBM systems journal, 35(3&4), p.473 (1996)Google Scholar
3. Gonzales, C.O. et al., Proceeding of the 1st international conference on electrical and electronics engineering, p.473 (2004)Google Scholar
4. Somekh, R. E., Journal of Vacuum Science and Technology A, 2, p.1285 (1984)Google Scholar
5. Choi, W.K., Surface & Coatings Technology, 201, p.8099 (2007)Google Scholar