期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 43, 页码 9303-9310出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc01004c
关键词
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资金
- Ministry of Science and Technology (973 project) [2012CB933301]
- NSFC [61274065, 60907047, 51173081, 61136003, 51372119, 51172110, BZ2010043]
- Ministry of Education of China [IRT1148]
- Research Projects of the Social Science and Humanity on Young Fund of the Ministry of Education [13YJCZH091]
- Qing Lan Program of Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Synergetic Innovation Center for Organic Electronics and Information Displays
Bone-like Au nanoparticles (NPs) along with a small number of by-products of nanorods, nanocubes and other irregular shapes were synthesized using a seed-mediated growth approach. The mixed Au NPs generate a very wide absorption spectra of 300-1000 nm with three main absorption peaks at 520, 600, and 770 nm, extending to the main absorption, cut-off and transparence region of the poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C-61-butyric acid methylester (PCBM) active layer. The mixed Au NPs were attached onto the ITO anode via a self-assembly method, and then P3HT:PCBM-based polymer photovoltaic cells (OPVs) were fabricated. The short-circuit current density and power conversion efficiency are significantly enhanced by 18.6% and 24.2% respectively, accompanied by the optimization of NPs distribution density. Optical, electrical, and morphological changes with the incorporation of Au NPs in the cells were thoroughly analyzed, and the results demonstrated that the cell performance improvement is mainly attributed to a synergistic reaction, including both the localized surface plasmon resonance-and scattering-induced absorption enhancement of the active layer, Au NPs-induced hole extraction ability enhancement, and large interface roughness-induced efficient exciton dissociation and hole collection.
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