A highly conductive PEDOT:PSS film with the dipping treatment by hydroiodic acid as anode for organic light emitting diode |
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| Affiliation: | 1. Department of Electronics Engineering, Dankook University, Cheonan-si 330-714, Chungnam, Republic of Korea;2. Corporate Technology Division, POSCO, Daechi 4-dong, Gangnam-gu, Seoul 135-777, Republic of Korea;3. School of Mechatronics Engineering, Korea University of Technology and Education, Cheonan-si 330-708, Chungnam, Republic of Korea;1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, Jilin, People''s Republic of China;2. College of Physics, Jilin University, 119 Jiefang Road, Changchun, 130023, People''s Republic of China |
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| Abstract: | A highly conductive, transparent and uniform poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) film has been developed by dipping treatment with hydriodic acid (HI) solution. The HI-treated PEDOT:PSS film can reach a sheet resistance of 68 Ω per square and a transmittance of 87% at 550 nm. The conductivity enhancement for the HI-treated film is ascribed to the permeation of proton and iodine anion of HI into PEDOT:PSS film, resulting in the separation of PSS and PEDOT chains. The phase separation of PSS and PEDOT can provide more conductive pathways for carriers to improve conductivity of the film. Using the optimized HI-treated PEDOT:PSS film as anode, we have fabricated indium tin oxide (ITO)-free organic light emitting diode (OLED), which shows better performance than the device with ITO as anode. This proves that such PEDOT:PSS film with the dipping treatment by HI solution is a promising alternative to ITO for low cost, transparent and flexible OLED application. |
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| Keywords: | Hydriodic acid PEDOT:PSS Flexible OLED |
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