Long-Term Stability and Efficiency of Dye-Sensitized Solar Cells

摘要

For the first time, a certified AMI.5 efficiency of 8.2% has been reached fornano-crystalline dye-sensitized solar cells (nc-DSC) on areas larger 1 sq. cm. i.e. 2.5 sq. cm. It has been further proven, that 2-valent salts like MgI(sub 2) and CaI(sub 2) as additives to the electrolyte have a strong stablizing effect during UV-illumination. Tests under continuous light soaking for several thousand hours demonstrate the ability of nc-DSCs to operate for at least 5-10 years under outdoor illumination conditions without major degradations. Continuous and periodic thermal tests according to IEC 1215 norms are promising but with 30% to 40% loss in efficiency still critical.