ACS Applied Materials & Interfaces 2010-05-01

Enhancement of device performance of organic solar cells by an interfacial perylene derivative layer.

Inho Kim, Hanna M Haverinen, Jian Li, Ghassan E Jabbour

Index: ACS Appl. Mater. Interfaces 5th ed., 2 , 1390-1394, (2010)

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Abstract

We report that device performance of organic solar cells consisting of zinc phthalocyanine and fullerene (C(60)) can be enhanced by insertion of a perylene derivative interfacial layer between fullerene and bathocuproine (BCP) exciton blocking layer (EBL). The morphology of the BCP is influenced by the underlying N,N'-dihexyl-perylene-3,4,9,10-bis(dicarboximide) (PTCDI-C6), which promotes migration of the cathode metal into the BCP layer. Insertion of a PTCDI-C6 layer between fullerene and BCP layers enhances the power conversion efficiency to 2.5%, an improvement of 32% over devices without PTCDI-C6 layer. The enhancement in device performance by insertion of PTCDI-C6 is attributed to a reduction in series resistance due to promoted metal migration into BCP and optimized optical interference effects in multilayered devices.