Photovoltaic properties and inner electric field of ZnO/Zn-phthalocyanine hybrid solar cells

The photovoltaic properties and distribution of inner electric field were studied for ZnO/Zn-phthalocyanine (ZnPc)/Au solar cells, the ZnO films of which were prepared by the metal organic chemical vapor deposition (MOCVD) method. The photocurrent is generated only by the excitation of ZnO, and the excitation of ZnPc does not contribute to the photocurrent generation. An electroabsorption (EA) study indicated that the inner electric field only exists in the ZnO layer. The absence of the inner electric field in the ZnPc layer results in the absence of photocurrent with ZnPc excitation.