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continuous illumination of solar global irradiance (Pin) on multicrystalline silicon solar cell

By performing numbers of experiments for continuous illumination of solar global irradiance (Pin) on multicrystalline silicon solar cell from morning to evening for 10 days in the month of November, 2013 and analysing all the datas we obtained some results which are given in above tables and corresponding five graphs are also drawn. Figure – 4 shows variation in global solar irradiance (Pin) with time (from morning to evening) and from other graphs we observe dramatic changes of various parameters of multicrystalline solar cell. In figure – 5 we observed that the global solar irradiance (Pin) and open circuit voltage inversely proportional. The Figure – 6 & 7 shows that the maximum output power (Pmax) and Short Circuit Current (Isc) measured across solar array are directly proportional to the global solar irradiance (Pin). From figure – 8 we can say that the fill factor (FF) of solar array decreases as the global solar irradiance (Pin) increases so we can say that fill factor is inversely proportional to the global solar irradiance (Pin). Figure – 9 shows that global solar irradiance (Pin) and efficiency () are inversely proportional. From the observations and different graphs we found that efficiency () and fill factor (FF) are affected by the carrier concentration and temperature of day time duration within the multicrystalline silicon solar cell. IV. CONCLUSION Looking to the observations and graphs for multicrystalline silicon solar cell we found that as illumination of global solar irradiance (Pin) increases the open circuit voltage (Voc) decreases. It confirms that open circuit voltage (Voc) is inversely proportional to the temperature of the multicrystalline silicon solar cells array. The maximum output power (Pmax) and short circuit current (Isc) increases with illumination of global solar irradiance (Pin) and it becomes maximum at the noon time and then decreases by the evening, which shows that the maximum output power (Pmax) and short circuit current (Isc) are directly proportional to the illumination of global solar irradiance (Pin). The efficiency () and fill factor (FF) are directly proportional to the open circuit voltage (Voc). Our observations confirm that as open circuit voltage (Voc) decreases the efficiency () and fill factor (FF) also decreases. According to findings of our result we came to conclude that due to the continuous illumination of global solar irradiance (Pin) the array of solar cell gets heated and it affects the parameters like efficiency () and fill factor (FF)