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Energies 2017, 10(5), 716;

The Investigation of High Quality PEDOT:PSS Film by Multilayer-Processing and Acid Treatment

Department of Electrical Engineering, Kao-Yuan University, Kaohsiung 821, Taiwan
Department of Electronic Engineering, I-Shou University, Kaohsiung 84008, Taiwan
Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
Department of Aviation & Communication Electronics, Air Force Institute of Technology, Kaohsiung 820, Taiwan
Department of Applied Physics, National University of Kaohsiung, Kaohsiung 81148, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Jean-Michel Nunzi
Received: 29 March 2017 / Revised: 27 April 2017 / Accepted: 15 May 2017 / Published: 18 May 2017
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In this study, we have investigated the performance of multilayer films of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) treated with one of the perfluorinated carboxylic acids, named trifluoroacetic acid (TFA). According to the increased density of the PEDOT chain under unit area conditions, the sheet resistance (Rsq) has improved from 300 to 65 Ω/sq through additional processing of PEDOT:PSS from single layer to multilayer. After the further treatment with TFA, however, the Rsq of the multilayer PEDOT:PSS was enhanced to 45 Ω/sq, leading to the decline of film thickness from 400 to 270 nm. Both conductivity and work function based on X-ray photoelectron spectroscopy results have built a breakthrough by double-processing because of the higher density of conductive PEDOT chains and the increase of 0.4 eV alternatives to typical indium tin oxide substrate, respectively. This improvement is contributed to the development of more effective transparent electrodes. View Full-Text
Keywords: double processing; organic solar cells; transparent electrode; sheet resistance double processing; organic solar cells; transparent electrode; sheet resistance

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Sze, P.-W.; Lee, K.-W.; Huang, P.-C.; Chou, D.-W.; Kao, B.-S.; Huang, C.-J. The Investigation of High Quality PEDOT:PSS Film by Multilayer-Processing and Acid Treatment. Energies 2017, 10, 716.

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