| Autor: |
Shun-Wei Liu, Wei-Cheng Su, Chih-Chien Lee, Chia-Chang Chou, Chi-Feng Lin |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Journal of the Chinese Chemical Society. 60:160-165 |
| ISSN: |
0009-4536 |
| Popis: |
To improve the power conversion efficiency (PCE) of small molecular weight organic photovoltaic cells (OPVs) it is proposed to use a simple fabrication method by controlling the deposition rate of the acceptor material fullerene (C60) in planar heterojunction OPV structures of ITO/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/copper phthalocyanine (CuPc)/C60/bathocuproine (BCP)/Ag. In our optimised device, the highest PCE of 1.7% was obtained through a deposition rate of C60 equal to 0.3 nm/s due to the superior charge balance in the CuPc/C60 heterojunction. Such a charge balance condition increased the fill factor from 52.4% to 56.1% by reducing the carrier accumulation in the OPV device. The electron only device was fabricated with the purpose of analysing the electron mobility of C60 as a function of the deposition rate. In addition, the effects of the deposition rates on the performance of planar OPV devices were exhaustively analysed by examining the absorption properties and the surface morphologies. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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