太阳能电池是一种大有前途的新型电源．那么，什么是太阳能电池呢？太阳能电池是利用太阳能发电的装置．简单说来，太阳能电池是一个半导体光电二极管，当太阳光照到光电二极管上时，光电二极管就会把太阳的光能变成电能，产生电流．当然，一个光电二极管产生的电能是很小的， Solar cells are a promising new power source. So what is a solar battery? Solar cells are devices that use solar power. In simple terms, a solar cell is a semiconductor photodiode. When the sun shines on a photodiode, the photodiode converts the sun’s light energy into electrical energy, generating a current. Of course, the power generated by a photodiode is very small,