据日本《Semiconductor World》1992年第1期报道。日本夏普公司已开发成转换效率为20.4％硅单晶太阳能电池。现今所开发的太阳能电池的尺寸为5cm×5cm。采用以下两种技术来提高转换效率。 (1)电极采用光反射率高的银,以提高太阳能电池内部的反射率,特别是有效利用长波长领域的太阳光。在工艺方面,去除残留铝扩散层的合金层以便形成银电极,提高了光反射率。因此,与以前采用铝电极的太阳能电池相比,转换效率在19.5％的基础上,提高了0.2％。 According to Japan’s “Semiconductor World” No. 1, 1992 reported. Sharp Japan has developed a conversion efficiency of 20.4% silicon monocrystalline solar cells. The size of solar cells developed today is 5 cm x 5 cm. Use the following two techniques to improve conversion efficiency. (1) The electrode is made of silver with high light reflectance to improve the reflectance inside the solar cell, and especially to effectively utilize the sunlight in the long wavelength range. Technically, the alloy layer of the remaining aluminum diffusion layer is removed to form a silver electrode, improving the light reflectivity. As a result, the conversion efficiency increased by 0.2% over the previous 19.5% compared to the previous solar cells using aluminum electrodes.