Photovoltaic effect in ferroelectric polyvinylidene fluoride (PVF2) polymer

Wamadeva Balachandran; A. Tawansi; H. Abdelkader; El-Sayed H. El-Konyaly; Somia Mostafa El-Hefnawy

doi:10.1117/12.187510

23 September 1994 Photovoltaic effect in ferroelectric polyvinylidene fluoride (PVF2) polymer

Wamadeva Balachandran, A. Tawansi, H. Abdelkader, El-Sayed H. El-Konyaly, Somia Mostafa El-Hefnawy

Proceedings Volume 2285, Nonlinear Optical Properties of Organic Materials VII; (1994) https://doi.org/10.1117/12.187510
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

A mathematical model of the bulk photovoltaic effect in polyvinylidene fluoride (PVF₂) films due to the optical excitation of impurities or defects in an asymmetric potential is developed. The asymmetry is due to the internal electric field of a poled PVF₂ thin film. This effect gives rise to a photocurrent in the absence of an applied electric field in contrast to the conventional photovoltaic effect in ordinary semiconductors. A space charge formation mechanism, based on the non-equilibrium carriers and some characterizing parameters of the traps in the band gap, is modelled. According to this approach the photovoltaic effect is described by three nonlinear interactive differential equations. The equations are solved both analytically and numerically and closed-form formulae for the photovoltaic current and voltage are derived. A computer simulation for the phenomena is performed using the developed model. The results of simulation agree within acceptable accuracy to the experimental results.

Citation Download Citation

Wamadeva Balachandran, A. Tawansi, H. Abdelkader, El-Sayed H. El-Konyaly, and Somia Mostafa El-Hefnawy "Photovoltaic effect in ferroelectric polyvinylidene fluoride (PVF2) polymer", Proc. SPIE 2285, Nonlinear Optical Properties of Organic Materials VII, (23 September 1994); https://doi.org/10.1117/12.187510

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