Hybrid solar cells of Ru-based dye complexes as interfacial modification layers: Energy level alignment and photoelectric properties improvement

The chemical incompatibility at the organic-inorganic heterojunction interface in hybrid solar cells is a serious issue that cannot be ignored. In this work, four Ru-based dye complexes (D-series organic dyes) were employed for the interfacial properties modulation. The results showed that the introduction of organic molecules can not only improve the compatibility between the organic and inorganic materials, but also provide an appropriate energy levels alignment of the materials in the hybrid films. A notable power conversion efficiency of 2.91% was achieved. The intrinsic factors that affecting the cells performance were investigated by electrochemical impedance and open circuit voltage decay measurements.