Influence of gold-silica nanoparticles on the performance of small-molecule bulk heterojunction solar cells
Kyaw, A. K. K.
Demir, Hilmi Volkan
Wong, T. K. S.
Sun, X. W.
Organic Electronics: physics, materials, applications
Elsevier BV * North-Holland
20 - 28
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Light trapping by gold (Au)-silica nanospheres and nanorods embedded in the active layer of small-molecule (SM) organic solar cell has been systematically compared. Nanorod significantly outperforms nanosphere because of more light scattering and higher quality factor for localized surface plasmon resonance (LSPR) triggered by nanorods. The optimum concentration of nanorod was characterized by charge carrier transport and morphology of the active layers. At optimum nanorod concentration, almost no change in the morphology of the active layer reveals that LSPR and scattering effects rather than the morphology are mainly responsible for the enhanced power conversion efficiency. In addition, the preliminary lifetime studies of the SM solar cells with and without Au-silica nanorods were conducted by measuring the current density-voltage characteristics over 20 days. The results show that plasmonic device with nanorods has no adverse impact on the device stability
Plasmonic effect Stability
Small-molecule solar cell
Surface plasmon resonance
Bulk heterojunction solar cells
Current density-voltage characteristics
Localized surface plasmon resonance
Power conversion efficiencies
Published Version (Please cite this version)http://dx.doi.org/10.1016/j.orgel.2015.03.026
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