Alta Devices has developed a technique for achieving a record 28.2 percent solar cell efficiency or higher of about 1 point more than the last record for single-junction solar cells, NREL verified.
Company that boosted funding from Silicon Valley company, has been trying to optimize the ability of solar cells in capturing sunlight emitted to reach the highest efficiency solar cells. Scientists have conducted tests last year and has reached 27.6 percent efficiency.
According to the company, solar cells have the ability to emit its own light and the light emission efficiency is the key for these high efficiencies. The engineers use the material from gallium arsenide (GaAs) to generate a lot of photons inside the solar cell, it typically uses multiple semiconductor layers.
Materials of gallium arsenide that expensive encourage companies to develop a novel production method in which the bottom layer of the solar cell would be made of microwire arrays embedded in another material and then made thinner with a simple peel-off process. The company has also made a thin-film GaAs cell that can be placed on a flexible substrate.
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