Mechanisms of the improved organic photovoltaic performance by using electron-transporting CuPc derivative as anode modifying layer

摘要: Abstract The authors demonstrate the mechanisms of improved performance organic photovoltaic (OPV) cells by using an electron-transporting copper phthalocyanine (CuPc) derivative, hexadecafluoro-copper-phthalocyanine (F 16 CuPc) as anode buffer layer. power conversion efficiency and long-term lifetime OPV with 3 nm F CuPc layer are increased 50% 165%, respectively, compared to reference cell. X-ray diffraction analysis suggests that crystalline is found, leading hole mobility exciton diffusion length when it deposited on CuPc. As a result, balanced charge carrier transport between C 60 , decreased recombination probability, dissociation can be obtained. Meanwhile, built-in potential cell also increased, which further promotes extraction photogenerated carriers increases open circuit voltage cells. And prolonged attributed suppressed formation reactive −O species ITO surface prevented penetration them into layers.