Effective hole extraction of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) via post-treatment with alcoholic solvent for highly conductive polymer electrode in ITO-free organic solar cells

Dong Hwan Wang; Min Soo Kim; Woongsik Jang; HyungBin Son; Felix SunJoo Kim

doi:10.1117/12.2571829

20 August 2020 Effective hole extraction of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) via post-treatment with alcoholic solvent for highly conductive polymer electrode in ITO-free organic solar cells

Dong Hwan Wang, Min Soo Kim, Woongsik Jang, HyungBin Son, Felix SunJoo Kim

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Proceedings Volume 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI; 1147421 (2020) https://doi.org/10.1117/12.2571829
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

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Abstract

In this study, we developed a effective processing protocol to modify the electrical conductivity of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films via post-treatment with an alcohol-based solvent, 2-chloroethanol (2-CE), and to improve their performance as a transparent anode in organic photovoltaics (OPVs). Due to its appropriate boiling point, 2-CE is advantageous both for treating as a liquid phase chemical and for drying from the films via evaporation. We compared the optical and electrical properties of the 2-CE-treated PEDOT:PSS with those of standard 5 vol% dimethyl sulfoxide (DMSO) added PEDOT:PSS. With a similar thickness and transmittance in the visible region, the 2-CE-treated polymer electrodes surpassed the DMSO-added films with regard to the electrical conductivity. Additionally, we conducted X-ray Photoelectron Spectrometer (XPS), Ultraviolet Photoelectron Spectroscopy (UPS), J-V characteristic, Photoluminescence (PL), Impedance spectroscopy.

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Dong Hwan Wang, Min Soo Kim, Woongsik Jang, HyungBin Son, and Felix SunJoo Kim "Effective hole extraction of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) via post-treatment with alcoholic solvent for highly conductive polymer electrode in ITO-free organic solar cells", Proc. SPIE 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI, 1147421 (20 August 2020); https://doi.org/10.1117/12.2571829

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KEYWORDS

Electrodes

Organic photovoltaics

Polymers

Solar cells

Chemistry

Polymer thin films

Transparent conducting films

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