Publication date: Available online 6 April 2016
Source:Thin Solid Films
Author(s): Yang-Yen Yu, Wen-Chen Chien, You-Jhe Wang
In this study, polymer:fullerene bulk-heterojunction hybrid solar cells with the structure, fluorine-doped tin oxide (FTO)/Cu2 O/poly (3-hexylthiophene): 6,6-phenyl-C61 -butyric acid methyl ester (P3HT:PCBM):TiO2 /Ca/Al, were fabricated. The effect of a p-type Cu2 O thin layer deposited between the active layer (P3HT:PCBM) and the FTO layer on cell performance was investigated; the p-type Cu2 O thin layer was deposited through thermal evaporation. The results showed that the Cu2 O interfacial layer increased the efficiency and stability of the hybrid solar cells. The optimal performance was obtained for the solar cell structure FTO/Cu2 O (10 nm)/P3HT:PCBM:TiO2 (15 wt%)/Ca/Al (best cell structure), which had the following specifications: open-circuit voltage = 0.58 V, short circuit current density = 12.14 mA/cm2, fill factor = 58.63%, and η = 4.13%. The Cu2 O layer prevented the rapid degradation of the interface, thereby increasing the lifetime of the hybrid solar cells.
Source:Thin Solid Films
Author(s): Yang-Yen Yu, Wen-Chen Chien, You-Jhe Wang