Journal
JOURNAL OF COMPUTATIONAL ELECTRONICS
Volume 21, Issue 1, Pages 137-152Publisher
SPRINGER
DOI: 10.1007/s10825-021-01829-x
Keywords
Plasmonic nanostructure; Realistic modeling; Parasitic absorption loss; Near-far field effect; Organic solar cell
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By using 3D-FDTD method, the optical plasmonic properties of adding nanostructure to the buffer/active layer of organic solar cells were studied. It was found that Al and Ag nanostructures can improve the performance of organic solar cells, especially through the near-field effect. Al nanostructured sample showed less parasitic absorption loss compared to Au and relative Ag.
Plasmonic structures may improve cell performance in a variety of ways. More accurate determining of the optical influence, unlike ideal simulations, requires modeling closer to experimental cases. In this modeling and simulation, irregular nanostructures were chosen and divided into three groups and some modes. For each mode, different sizes of nanoparticles were randomly selected, which could result in pre-determined average particle size and standard deviation. By 3D finite-difference time-domain (3D-FDTD), the optical plasmonic properties of that mode in a solar cell structure were investigated when the nanostructure was added to the buffer/active layer of the organic solar cell. The far- and near-field results were used to compare the plasmonic behavior, relying on the material and geometry. By detailed simulations, Al and Ag nanostructure at the interface of the ZnO/active layer can improve organic solar cell performance optically, especially by the near-field effect. Unlike Au and relative Ag, the Al nanostructured sample showed less parasitic absorption loss.
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