Outline Thin-film solar cell

At present, crystalline silicon solar Panasonic CGR-S003 cells have been widely used solar cells ,and occupied the main market. However, crystalline silicon solar cells inherent weaknesses:

1. Silicon band gap Eg = 1.12eV, solar photovoltaic conversion efficiency is relatively low Li.


2. Silicon material is an indirect band material, in the visible range, the optical absorption coefficient of silicon is far lower than other solar photovoltaic material, such as the same 95% of the sunlight absorption, GaAs solar cells ,Casio NP-20 need only 5 to 10 microns in thickness, while The silicon solar batteries requires more than the thickness of 150 microns; Thus, in the preparation of crystalline silicon solar Canon NB-5L cell, the silicon thickness of 150 to 200 microns or more can effectively absorb solar energy;


3. Crystalline silicon material need to go through several purification, the relatively cost is high;


4. Silicon solar cell ,Canon NB-5L size is relatively small, if the composition of photovoltaic systems,it must make dozens of the same silicon solar cells ,Canon NB-4Lconnected together, which results in a higher cost of the system.

Therefore, the thin-film solar cells,Canon NB-5H has aroused people's interest and has been applicated under a certain degree in industrial.

Article via:laptopinfo