Internationam on Mathematics and Natural Sciences, ICMNS 2008, Bandung, Indonesia

A METHOD OF DETERMINATION OF EQUIVALENT CIRCUIT PARAMETERS BASED ON REVERSE BIAS CHARACTERISTIC OF PHOTOVOLTAIC DEVICES

Timothy Siahaan, Kuwat Triyana, and Sholihun

Physics Department, Gadjah Mada University, Yogyakarta Indonesia

E-mail: timmy_fisika_ugm_99@yahoo.co.id and lion_avs@yahoo.

Abstract. Determination of equivalent circuit parameters of photovoltaic devices is very important in studying the performance of such device. In this paper we propose a simple but quite accurate method to determine such parameters by considering the reverse bias characteristic of a photovoltaic devices. Considering the reverse bias characteristic of a photovoltaic device gives four equations for five parameters included in the well known one diode equivalent circuit model, simplifying the computation of the parameters. As an example, we apply this method to determine parameters of a photovoltaic device based on copper phthalocyanine/perylene illuminated with white light at about 100 mW/cm2. The result gives a very good fitting to the current denisty-bias voltage curve in that we cannot distinguish the curve from our approximation with the one from the experimental data.

Keywords: one diode equivalent circuit model, photovoltaic device, current density-voltage characteristics.