日本公司用新技术大幅提高太阳能电池转换效率
2009
10/23
11:18
705
夏普公司22日发布的新闻公报说,化合物太阳能电池不同于现在主流的以硅为材料的太阳能电池.
它以铟等2种以上元素组成的化合物作为材料,形成光吸收层,其光电转换效率高于硅晶体太阳能电池,主要应用于人造卫星.
夏普从2000年起致力于研发由3层光吸收层叠加而成的3接面化合物太阳能电池.以往的3接面化合物太阳能电池底层都使用锗材料,虽然利用这种材料会产生很大的电流,但电流的大部分不能作为电能使用.另外一种材料砷化镓铟可使电流的利用效率大幅提高,但生产原子排列非常规则的高品质砷化镓铟却非常难.夏普研发人员应用独创的层形成技术,解决了高品质砷化镓铟层形成的难题,使3接面化合物太阳能电池的光电转换效率从以往的31．5％提升到 35．8％.
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