Impedance spectroscopy of PTB7-Fx:PC70BM bulk heterojunction solar cells prepared in ambient environment

PTB7:PC70BM bulk heterojunction solar cells with variable degree of fluorination in the thieno[3,4-b]thiophene units were prepared by spin-coating on ITO-covered glass in ambient conditions. We investigated the effect of the fluorination on the dynamic properties of the cells which were characterize...

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Bibliographic Details
Main Authors: Gergova, R., Sendova-Vassileva, M., Popkirov, G., Grancharov, G., Gancheva, V.
Format: Conference Proceeding
Language:English
Subjects:
Coating effects
Fluorination
Frequency ranges
Heterojunctions
Impedance spectroscopy
Photovoltaic cells
Solar cells
Spectrum analysis
Spin coating
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Summary:PTB7:PC70BM bulk heterojunction solar cells with variable degree of fluorination in the thieno[3,4-b]thiophene units were prepared by spin-coating on ITO-covered glass in ambient conditions. We investigated the effect of the fluorination on the dynamic properties of the cells which were characterized by impedance spectroscopy in the frequency range between 1 mHz and 100 kHz. The results for the obtained parameters for the series and shunt resistances are compared and related to these obtained by the J-V characteristics.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5091321