Material alternative to ITO for transparent conductive electrode in flexible display and photovoltaic devices

Aleksandrova, Mariya (Department of Microelectronics, Technical University of Sofia, Sofia, Bulgaria) ; Kurtev, Nikolay (French Language Faculty of Electrical Engineering, Technical University of Sofia, Sofia, Bulgaria) ; Videkov, Valentin (Department of Microelectronics, Technical University of Sofia, Sofia, Bulgaria) ; Tzanova, Slavka (Department of Microelectronics, Technical University of Sofia, Sofia, Bulgaria ; French Language Faculty of Electrical Engineering, Technical University of Sofia, Sofia, Bulgaria) ; Schintke, Silvia (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

The mechanical stability of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films spin coated onto a UV treated PET substrate was investigated. It was found that the UV exposure modifies the PET surface and improves the wetting conditions for PEDOT:PSS films deposition. The adhesion strength of PEDOT:PSS to UV treated PET surface was found to be 50 N/cm2 versus 19 N/cm2 to the untreated one. Furthermore, the resistance change of PEDOT:PSS on UV treated PET at 20,000 cycles of bending was measured to be only 3.8%. In contrast, the same polymeric films on untreated PET exhibit 8.7% resistance change and the conventional indium tin oxide (ITO) electrode 23.5%, which demonstrates the superior flexibility of the UV PET/PEDOT:PSS electrodes. The transparency of the produced coatings is 81%. Single layer organic light-emitting device with MEH-PPV electroluminescent polymer was successfully fabricated on UV PET/PEDOT:PSS. The electrical measurements indicate the possibility of using UV PET/PEDOT:PSS as a transparent electrode system, replacing ITO in the flexible optoelectronic devices.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
COMATEC - Institut de Conception, Matériaux, Emballage & Conditionnement
Date:
2015-04
Pagination:
5 p.
Published in:
Microelectronic Engineering
Numeration (vol. no.):
2015, vol. 145, pp. 112-116
DOI:
ISSN:
0167-9317
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2020-06-30, last modified 2020-06-30

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