40年之后，美国发明家查尔士•弗里兹(Charles Fritts)用硒和薄金片制造出第一枚光能电池，发电效率低于1%。
About 40 years later Charles Fritts, an American inventor, built the first solar cell. Made with selenium and a thin layer of gold, the device was less than 1% efficient.
光伏电池依赖于非晶态或晶态的硅，碲化镉或者硒化、硫化铜铟。
Photovoltaic cells rely on amorphous or crystalline silicon, cadmium telluride, or copper indium selenide and sulfide.
其它一些公司，诸如heliovolt以及Nanosolar，也在用铜铟镓硒(CIGS)电池来参与这场薄膜电池竞赛。
Other companies, notably Heliovolt and Nanosolar, are in a race to make thin-film panels using copper indium gallium selenide (CIGS) cells.
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