TECHNOLOGYSOLAR


n order to reduce the power-generating cost of crystalline silicon-based solar cells, it is necessary to achieve a high conversion efficiency with thinner crystalline silicon wafers. The Voc of a very thin HIT solar cell reached 747 mV by improving the passivation capability of the a-Si/c-Si interface. The Hall mobility of a transparent conductive oxide increased 1.3 times. With these technical improvements, the conversion efficiency of the HIT solar cell rose to 23.0%.


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In order to suppress the production cost, SANYO applied these improvements to thin HIT solar cells. This resulted in a conversion efficiency of 22.8% for a 98-µm-thick HIT solar cell. Because of its


excellent conversion efficiency, the HIT solar cell has received much attention, and many researchers have been studying amorphous–silicon/crystalline-silicon heterojunction solar cells


Background


As long as it is exposed to sunlight, the solar cell will continuously generate electricity without consuming fossil fuels. Despite such a preferable and clean feature, it has not spread as a valid power source until recently. The reason why the solar cell has not been commonly used is its low power output due to the low energy density of sunlight, and the fact that it is costly. However, in


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Image information


Location: Cori (Latina, Italy) System size: 200kW


Distributor & installer/PJ realizer: DEA srl Building: Cooperativa Agricola Cincinnato (Wine Factory)


www.solar-pv-management.com Issue IX 2010


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