Journal
ORGANIC ELECTRONICS
Volume 48, Issue -, Pages 336-341Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2017.06.003
Keywords
Organic solar cell; Small molecule; Localized surface plasmon resonance; MoO3 buffer layer; Au: Ag nanoparticle
Funding
- National Natural Science Foundation of China [61376062, 11004187, 61575192, 61376022]
- Science and Technology Development Plan of Jilin Province [20140201094JC]
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Cooperative plasmon enhanced small molecule organic solar cells are demonstrated based on thermal coevaporated Au and Ag nanoparticles (NPs). The optimized device with an appropriate molar ratio of Au: Ag NPs shows a power conversion efficiency of 3.32%, which is 22.5% higher than that of the reference device without any NPs. The improvement is mainly contributed to the increased short-circuit current which resulted from the enhanced light harvesting due to localized surface plasmon resonance of Au: Ag NPs and the increased conductivity of the device. Besides, factors that determining the performance of the Au: Ag NPs cooperative plasmon enhance organic solar cells are investigated, and it finds that the thickness of MoO3 buffer layer plays a crucial role. Owing to the different diameter of the thermal evaporated Au and Ag NPs, a suitable MoO3 buffer layer is required to afford a large electromagnetic enhancement and to avoid significant exciton quenching by the NPs. (C) 2017 Elsevier B.V. All rights reserved.
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