From what I have heard, the efficiency of solar cells is at best about 40 percent or so. That is not good enough at current manufacturing costs to make it possible for the technology to compete with other forms of power that consumers can purchase. So, either the efficiency must increase or the cost to produce the cells must decrease. It looks like Professor W.S. Sampath from Colorado State University has developed a technique to create solar cells without the pricey silicon, therefore making th
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