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Bulk Heterojunction Solar Cell Based on Porphyrin Compounds

ZHANG Tian-hui1,2,ZHAO Su-ling1,PIAO Ling-yu2,XU Zhen g1,KONG Chao1 1.Key Laboratory of Luminescence and Optical Information of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China 2.National Center for Nanoscience and Technology,Beijing 100190,China  
Three kinds of porphyrins which can abbreviate as TPP,TPPCu and TMPPFeCl were s ynthesized by one-step method with mixed solvents.Then these porphyrin materia ls were used as donors to fabricate organic solar cells with PCBM as accepter by t he solution processing of spin-coating method.The structure is ITO/porphyrin∶ PCBM/Al.The photovoltaic characterizations of these devices were investigated. The device based on TPP∶PCBM shows the best performance with an open circuit vo ltage(VOC) of 0.52 V,a short circuit current(JSC) of 0. 98 mA·cm-2,and fill factor(FF) of 30.1%.Then the influence of differ ent weight ratio of TPP∶PCBM was researched.The best weight ratio of TPP∶PCB M is 1∶1.Increasing or decreasing the quatity of TPP would make JSC and VOC of the device deterioration and have little effect on the FF.
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