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

Po-Wen Sze, Kuan-Wei Lee, Pin-Chiao Huang, Dei-Wei Chou, Bing-Siang Kao and Chien-Jung Huang
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Po-Wen Sze: Department of Electrical Engineering, Kao-Yuan University, Kaohsiung 821, Taiwan
Kuan-Wei Lee: Department of Electronic Engineering, I-Shou University, Kaohsiung 84008, Taiwan
Pin-Chiao Huang: Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
Dei-Wei Chou: Department of Aviation & Communication Electronics, Air Force Institute of Technology, Kaohsiung 820, Taiwan
Bing-Siang Kao: Department of Applied Physics, National University of Kaohsiung, Kaohsiung 81148, Taiwan
Chien-Jung Huang: Department of Applied Physics, National University of Kaohsiung, Kaohsiung 81148, Taiwan

Energies, 2017, vol. 10, issue 5, 1-11

Abstract: 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 (R sq ) has improved from 300 to 65 ?/sq through additional processing of PEDOT:PSS from single layer to multilayer. After the further treatment with TFA, however, the R sq of the multilayer PEDOT:PSS was enhanced to 45 ?/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.

Keywords: double processing; organic solar cells; transparent electrode; sheet resistance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
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