Sexta-feira, Abril 20, 2007

Novo elemento para capturar energia solar

A busca mundial por uma nova fonte sustentável de energia está fazendo consideráveis avanços na Wake Forest University, à medida que os pesquisadores do Centro de Nanotecnologia e Materiais Moleculares anunciaram ter conseguido eficiência maior do que 6% em células solares de plástico.
As células solares de plástico são extremamente bem vindas porque elas são mais baratas e mais leves, principalmente quando comparadas aos tradicionais painéis solares de silício. Os painéis solares tradicionais são pesados e volumosos e convertem cerca de 12% da luz que incide sobre eles, para transformá-la em energia elétrica.
As primeiras experiências da Wake Forest University tinham alcançado até 2005 a eficiência de 3%, chegando posteriormente a 5% e agora alcançando um pouco de 6%, após cerca de um ano passado.
A tecnologia de uso de células solares para ser viável tecnologicamente ao uso comercial deve ser capaz de converter em eletricidade cerca de 8% da energia solar capturada. Os pesquisadores da Wake Forest University esperam alcançar a eficiência de 10% na conversão de energia solar em eletricidade, no próximo ano.



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