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Organic solar cells with remarkable enhanced efficiency by using a CuI buffer to control the molecular orientation and modify the anode
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CuI is used to control the molecular orientation of copper phthalocyanine (CuPc) and modify the anodes in organic solar cells based on . By introducing a CuI buffer between indiumtin oxide and CuPc, the power conversion efficiency is significantly enhanced by a factor of . Because of the strong interactions between the CuI and CuPc, the stacking orientation of CuPc molecules is changed, resulting in a increase in absorption coefficient, a larger carrier mobility and a smoother film surface. The anodework function is raised by the formation of a dipole layer.
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