Journal
JOURNAL OF APPLIED PHYSICS
Volume 105, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3103328
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Funding
- NSFC [60721001]
- 863 Program [2007AA03Z424]
- Program for New Century Excellent Talents in University [NCET-06-0812]
- Young Excellence Project of UESTC [060206]
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The electrical characteristics of double heterojunction organic solar cells with various thicknesses of bathocuproine (BCP) as an exciton-blocking layer (EBL) were studied. A theoretical analysis using optical transfer matrix theory was carried out to obtain insight into how the EBL influences light-absorbing and exciton-transporting properties in the organic layers. The results showed that by employing an 8-10 nm BCP layer exciton density was increased by 46%. By using an improved equivalent circuit model, photovoltaic characteristics were parametrized and modeled, which revealed that the thin BCP layer <10 nm did not affect the charge collection process. The mechanism of metallic cathode influence on solar cells was also discussed. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3103328]
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