Model of Organic Solar Cell Photocurrent Including the Effect of Charge Accumulation at Interfaces and Non-Uniform Carrier Generation

Torto, Lorenzo; Cester, Andrea; Rizzo, Antonio; Wrachien, Nicola; Gevorgyan, Suren A.; Corazza, Michael; Krebs, Frederik C.

doi:10.1109/jeds.2016.2602563

Cited by 14 publications

(3 citation statements)

References 19 publications

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“…(i) It is assumed that all the excitons generated in the border area diffuse to the surface according to the definition of L D . All of them will split into free electrons and holes for three reasons: 1), the injection barrier leads to strong electric fields near the electrodes; 2), the electrodes dissociate excitons via energy transfer (especially if they are metallic); and 3), large band bending occurs at the surface, which provides sufficient energy to overcome the exciton binding energy.…”

Section: The Parameters Of Calculation (“Device 1” Represents the Parmentioning

confidence: 99%

Unified Model for Exciton Diffusion and Dissociation in Organic Solar Cells

Xiong

Sun

et al. 2019

Physica Rapid Research Ltrs

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The performance of organic solar cells is limited by the exciton. However, the theoretical model to study the nature of the exciton is separated into exciton diffusion and dissociation. This article proposes a unified model by combining both exciton diffusion and dissociation. This model can be reduced to the classical model of exciton diffusion or dissociation. Moreover, this model quantitatively explains meaningful experimental data of the short‐circuit current characteristic at different active layer thicknesses that cannot be fitted by the two classical models. In sum, this model is useful for researching the mechanism of the exciton in thin organic materials, which make some significant contributions to blend, multilayer, and A–D–A small‐molecule acceptor solar cells.

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Section: The Parameters Of Calculation (“Device 1” Represents the Parmentioning

confidence: 99%

Unified Model for Exciton Diffusion and Dissociation in Organic Solar Cells

Xiong

Sun

et al. 2019

Physica Rapid Research Ltrs

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“…from the cathode), then the value of a is negative. This idea of non-uniform G CT was proposed by [2] recently. The idea is extended here by allowing a to be positive or negative depending on where the light enters the active layer.…”

Section: Basic Equationsmentioning

confidence: 99%

“…A number of analytical models for describing the J-V characteristics of OSCs have been proposed (e.g. [1][2][3][4][5][6][7][8]). Marsh et al [1] proposed a semi-empirical analytical model where one of the premises is that the non-geminate recombination (i.e.…”

Section: Introductionmentioning

confidence: 99%

An analytical model for organic solar cells incorporating non-geminate monomolecular and bimolecular recombinations

Ibrahim¹

2018

Semicond. Sci. Technol.

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There is still a debate concerning the non-geminate recombination processes in organic bulk heterojunction solar cells. There are reports that suggest either only the non-geminate bimolecular recombination or the non-geminate monomolecular recombination is important, and also reports that suggest both non-geminate processes are important. In this paper, a physics-based analytical model for describing the current-voltage characteristics of organic bulk heterojunction solar cells is presented. The model incorporates both non-geminate recombination processes, which is an improvement compared with previous analytical models. This makes the model versatile by allowing us to choose whether to include both recombination processes or exclude one of the processes, depending on the studied device. In developing the model, a new method for calculating the non-geminate recombination and the current density in organic bulk heterojunction solar cells is proposed and employed. The model is validated with experimental current-voltage characteristics taken from the literature. Using the model, we show that considering the nongeminate recombination is important in order to properly predict the current-voltage characteristics of organic bulk heterojunction solar cells. The model can be useful for understanding the working operation of organic bulk heterojunction solar cells, and thus for predicting and improving the device performance. Finally, the method employed to develop the presented model can also be extended and employed to develop models for other devices.

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A physics-based current–voltage model for organic solar cells using a combined analytical and regression approach

Ibrahim

2023

Appl. Phys. A

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Model of Organic Solar Cell Photocurrent Including the Effect of Charge Accumulation at Interfaces and Non-Uniform Carrier Generation

Cited by 14 publications

References 19 publications

Unified Model for Exciton Diffusion and Dissociation in Organic Solar Cells

Unified Model for Exciton Diffusion and Dissociation in Organic Solar Cells

An analytical model for organic solar cells incorporating non-geminate monomolecular and bimolecular recombinations

A physics-based current–voltage model for organic solar cells using a combined analytical and regression approach

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