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

Romero, B.; Pozo, Gonzalo del; Arredondo, B.; Reinhardt, Jens; Seßler, M.; Würfel, Uli

doi:10.1109/jphotov.2014.2362978

Cited by 15 publications

(6 citation statements)

References 26 publications

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“…Obtained spectra from IS measurements allowed for fitting the experimental data by an electrical equivalent circuit (EEC) and also on the estimate resistances and relaxation times (see Table S7 ) and capacitance behavior of organic solar cells. The proposed approach to the fitting of the obtained data from IS experiments was also mentioned in articles [ 44 , 45 , 46 , 47 ]; the same equivalent electrical circuit of the described phenomena that occurred in organic solar cells based on polymers from the polythiophene family was also used in [ 44 , 45 , 46 , 47 ].…”

Section: Resultsmentioning

confidence: 99%

Thermo-Optical and Structural Studies of Iodine-Doped Polymer: Fullerene Blend Films, Used in Photovoltaic Structures

et al. 2022

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Optical and structural properties of a blend thin film of (1:1 wt.) of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) doped with iodine (I2) and then exposed to a stepwise heating were reported and compared with the properties of doped P3HT films. The UV-Vis(T) absorption measurements were performed in situ during annealing runs, at the precisely defined temperatures, in a range of 20–210 °C. It was demonstrated that this new method allows one to observe the changes of absorption spectra, connected with the iodine release and other structural processes upon annealing. In addition, the thermally-induced changes of the exciton bandwidth (W) and the absorption edge parameters, i.e., the energy gap (EG) and the Urbach energy (EU) were discussed in the context of different length of conjugation and the structural disorder in polymers and blends films. During annealing, several stages were distinguished and related to the following processes as: the iodine escape and an increase in P3HT crystallinity, the orderly stacking of polymer chains, the thermally inducted structural defects and the phase separation caused by an aggregation of PCBM in the polymer matrix. Moreover, the detailed X-ray diffraction studies, performed for P3HT and P3HT:PCBM films, before and after doping and then after their thermal treatment, allowed us to consider the structural changes of polymer and blend films. The effect of iodine content and the annealing process on the bulk heterojunction (BHJ) solar cells parameters was checked, by the impedance spectroscopy (IS) measurements and the J-V characteristics registration. All of the investigated P3HT:PCBM blend films showed the photovoltaic effect; the increase in power conversion efficiency (PCE) upon iodine doping was demonstrated.

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Section: Resultsmentioning

confidence: 99%

Thermo-Optical and Structural Studies of Iodine-Doped Polymer: Fullerene Blend Films, Used in Photovoltaic Structures

et al. 2022

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“…One approach to study S-shaped I-V curves is through fitting experimental data to theoretical electric circuit models. However, although Romero et al [22] developed equivalent electric circuit models that can quantitatively simulate three kinds of I-V curves in terms of forward and reverse diodes, they did not consider actual physical mechanisms. Here we analyze the temperature-dependent I-V characteristics using a double-diode electric circuit model and a hopping transport model to explain their origins.…”

Section: Introductionmentioning

confidence: 99%

Imbalanced charge carrier mobility and Schottky junction induced anomalous current-voltage characteristics of excitonic PbS colloidal quantum dot solar cells

Mandelis

Lan

et al. 2016

Solar Energy Materials and Solar Cells

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“…The J-V characteristics that present the S-shape cannot be reproduced with the standard one-diode model. For this reason, it is necessary to use the equivalent circuit model of three diodes to fit the experimental curves under illumination conditions [21], [22]. In Fig.…”

Section: Resultsmentioning

confidence: 99%

Inverted Polymer Solar Cells Using Inkjet Printed ZnO as Electron Transport Layer: Characterization and Degradation Study

Sacramento

Ramirez-Como

Balderrama

et al. 2020

IEEE J. Electron Devices Soc.

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In this work, stability and degradation of inverted organic solar cells (iOSCs) partially manufactured under air environment are analyzed. The degradation of iOSCs fabricated with inkjet printed ZnO and with spin coated PFN as electron transport layer (ETL) is compared. The PTB7 and PC 70 BM materials are used as donor and acceptor in the active layer, respectively, for all photovoltaic devices. During all the degradation study of the iOSCs, performance parameters such as open circuit voltage (V OC ), short circuit current density (J SC ), fill factor (FF) and Power conversion efficiency (PCE), are extracted from the current density -voltage measurements (J-V) under dark and light conditions. The PCE of the unencapsulated iOSCs with PFN as ETL, left under N 2 , decreased to 80% after 58 h, while the same PCE reduction for iOSCs with inkjet printed ZnO as ETL, occurred after 189 h. Under air environment, the PCE of unencapsulated iOSCs fabricated with ZnO as ETL devices decreases to 80% after 160 h.

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

Cited by 15 publications

References 26 publications

Thermo-Optical and Structural Studies of Iodine-Doped Polymer: Fullerene Blend Films, Used in Photovoltaic Structures

Thermo-Optical and Structural Studies of Iodine-Doped Polymer: Fullerene Blend Films, Used in Photovoltaic Structures

Imbalanced charge carrier mobility and Schottky junction induced anomalous current-voltage characteristics of excitonic PbS colloidal quantum dot solar cells

Inverted Polymer Solar Cells Using Inkjet Printed ZnO as Electron Transport Layer: Characterization and Degradation Study

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