Terahertz Spectroscopy Study of Weak Base-Treated Conducting Polymer Films and Applications for Polymer Solar Cells

Terahertz spectroscopy was employed to investigate the charge carrier dynamics of aniline-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films. The measured charge carrier lifetime was correlated with the performances of organic solar cells with the aniline-treated PEDOT...

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Bibliographic Details
Published inIEEE journal of selected topics in quantum electronics Vol. 23; no. 4; pp. 1 - 8
Main Authors Seo, Jooyeok, Nam, Sungho, Park, Soohyeong, Lee, Chulyeon, Park, Jaehun, Kim, Hwajeong, Kim, Youngkyoo
Format Journal Article
LanguageEnglish
Published IEEE 01.07.2017
Subjects
Charge carrier lifetime
conducting polymers
Laser excitation
organic solar cells
Photovoltaic cells
Polymers
Spectroscopy
THz spectroscopy
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Summary:Terahertz spectroscopy was employed to investigate the charge carrier dynamics of aniline-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films. The measured charge carrier lifetime was correlated with the performances of organic solar cells with the aniline-treated PEDOT:PSS hole-collecting layers. The result showed that the charge carrier lifetime was sensitive to the aniline content. The longest charge carrier lifetime was achieved for 1.2 mol.% aniline, which led to the highest power conversion efficiency of 8.83%. In particular, the trend of the charge carrier lifetime was found to be strongly affected by the surface morphology of the aniline-treated PEDOT:PSS layers.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2017.2656804