NDLI: Circuital Model Validation for S-Shaped Organic Solar Cells by Means of Impedance Spectroscopy

Content Provider	IEEE Xplore Digital Library
Author	Romero, B. del Pozo, G. Arredondo, B. Reinhardt, J.P. Sessler, M. Wurfel, U.
Copyright Year	2011
Abstract	Organic solar cells (OSCs) based on Poly[N-9'-heptadecanyl-2,7-carbazole-alt-5, 5-(4', 7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT):1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6) C61 (PCBM) have been electrically dc and ac characterized. Device structure is ITO/Poly(3,4-ethylenedioxy-wthiophene)-poly(4-styrene sulfonate) (PEDOT:PSS)/PCDTBT:PCBM/C60MA/Al. Devices show the so-called S-shaped current-voltage curve that has been modeled with a circuit including two diodes in forward and reverse bias. Impedance measurements show one semicircle at low bias ( V <; 0.4 V) and two semicircles at ( V <; 0.4 V). Results reveal that the high-frequency semicircle is associated with the forward diode-like behavior of the dc circuit, while the low-frequency semicircle is associated with the reverse diode that causes the S-shape. The analytical solution of the dc two-diode circuital model has been fitted to the experimental I-V, and dc circuital parameters have been obtained. The ac equivalent circuit was derived from the dc circuit, and small-signal parameters have been calculated from the fits to the experimental Cole-Cole.
Starting Page	234
Ending Page	237
Page Count	4
File Size	1249174
File Format	PDF
ISSN	21563381
Volume Number	5
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic cells Integrated circuit modeling Impedance Resistance Spectroscopy Polymers S-shape Circuit modeling impedance spectroscopy (IS) organic solar cells (OSCs)
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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