Solar cells are now widely used as a clean method for electric energy generation.\nAmong various type of solar cells, we compared the ability between\namorphous and tandem (amorphous and polycrystalline) silicon solar cells by\nmeans of simultaneous running test. This kind of comparison is of importance\npractically, because the comparison of only inherent characteristics\ncannot include environmental parameters such as temperature totally. It was\nconcluded that both types of solar cells provided almost the same energy for\none year. The amorphous silicon solar cell provided more energy in summer\nwhile the tandem solar cell was advantageous in winter. It is due to the fact\nthat the decrease in energy conversion at the higher cell temperature is more\nnoticeable in tandem solar cells.
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