Toshiba announced on the 21st that it will successfully realize the transparency of cuprous oxide solar cells for the first time. Toshiba envisions it will be applied to products that can be superimposed on the widely popular crystalline silicon solar cells to improve power generation efficiency. Cuprous oxide is an oxide of copper. Since copper is cheap to purchase, it is said to significantly reduce costs.
It has been confirmed that the cuprous oxide solar cell placed above can transmit light, so that the crystalline silicon solar cell placed below maintains high power output. Allegedly, in the preparation of cuprous oxide thin film, through the precise control of the amount of oxygen, to achieve the previously difficult transparency.
At present, the "multi-junction" products combining solar cells of different properties use gallium arsenide semiconductors. To replace cuprous oxide solar cells, Toshiba expects the manufacturing cost to be reduced to 0.1% -1%.
Toshiba's self-produced crystalline silicon solar cells have an energy conversion efficiency of 17.6%. The company strives to increase the conversion efficiency to 30% by using multi-junction solar cells using cuprous oxide in three years.
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