Abstract
We report that device performance of organic solar cells consisting of zinc phthalocyanine and fullerene (C60) 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.
Original language | English (US) |
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Pages (from-to) | 1390-1394 |
Number of pages | 5 |
Journal | ACS Applied Materials and Interfaces |
Volume | 2 |
Issue number | 5 |
DOIs | |
State | Published - May 26 2010 |
Keywords
- Bathocuproine
- Exciton blocking layer
- Organic solar cells
- Perylene derivative
ASJC Scopus subject areas
- Materials Science(all)