We demonstrate an enhancement in the power conversion efficiency (PCE) of p-i-n type organic solar cells consisting of zinc phthalocyanine (ZnPc) and fullerene (C60) using a p -layer of palladium phthalocyanine (PdPc). Solar cells employing three different device structures such as ZnPc/ZnPc:C60/ C60, PdPc/PdPc:C60/ C60, and PdPc/ZnPc:C60/ C60 with varying thickness of mixed interlayers were fabricated by thermal evaporation. The mixed i -layers were deposited by co-evaporation of MPc (M=Zn,Pd) and C60 by 1:1 ratio. PCE of 3.7% was obtained for optimized cells consisting of PdPc/ZnPc: C60 / C60, while cells with device structure of ZnPc/ZnPc: C60 / C60 showed PCE of 3.2%.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)