- [ A New and more efficient Solar Cell ! ] -

Any solar cell that exceeds 20 percent is great for commercial applications, but the Japanese company Kaneka has just presented a new solar cell capable of achieving an efficiency of 26.6%, setting a new record.

A promising future

One of the most delicate and complicated aspects in adopting solar energy for consumption is cost, especially when it comes to the installation process. Users need to know precisely how long it will take them to recover the total investment, and a good starting point in reducing that factor is to get panels with the best efficiency. Experts suggest that the number of efficiency on silicon cells is already crossed, but these prototypes require much more exotic designs and materials, which again breaks the cost-benefit ratio.

This new solar cell is 180.4 square centimeters and it has an efficiency of 26.6 percent, above the previous mark (that was in the hands of Panasonic). At first, the cell had reached 26.3 percent, but a series of optimizations allowed the developers to extract that additional 0.3 percent. The key behind this cell is an heterojunction technique that minimizes energy bands, and add a series of low resistance electrodes located at the back of the cell, which help to collect a greater amount of photons. The manufacturing of the cell is compatible with the available industrial methods, therefore, its improvements should not be lost in a laboratory.

Still, you have to be patient. More work and additional testing is needed before the cells can shape a solar panel ready to be installed. Kaneka's research was funded by the Japanese government through its agency NEDO, and the next objective is to continue to lower costs.

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