TEMPERATURE-DEPENDENT ANALYSIS OF GRADED JUNCTION SOLAR CELL PERFORMANCE USING CURRENT VOLTAGE CHARACTERIZATION
Abstract
Now a days fossils fuels are depleting and are expensive source of energy. Therefore, it is important to find some alternative source of energy. Sunlight is costless and is always available throughout the world. Since many years, solar energy has become of great interest for public. Scientists and researchers are trying to explore properties of semiconductor materials in order to increase the efficiency of solar cell. Solar cells show better performance under high irradiance however, it has also ability to work even at low irradiance. In this work, simulations have been made to examine the impact of various external and internal parameters on the working efficiency of solar cell. Ideal diode equation is used to calculate dark data of J vs V, characterization of lnJ vs V at dark and illuminated data at different temperature and to calculate all external and internal parameters to compare theoretical data with experimental data by origin software. A detailed analysis is introduced for variations in external parameters such as (Jsc. Voc. FF%, Eff %). Experimental values calculated for series resistance show good correlation with fitted values using Shockley equation. We have conducted results for solar cell external parameters as a function of doping density. Modeling for graded junction solar cell shows, Jsc, Voc, FF and efficiency decreases by increasing the temperature. The internal parameters ideality factor A and Current density Jo also decrease with increasing the temperature.
Keywords : Graded Junction Solar Cell; Current-Voltage Characterization; Temperature Dependence; Photovoltaic Parameters; Ideality Factor; Shockley Model.
