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Published on: March 2, 2016
Plasmonic structure enhanced exciton generation at the interface between the perovskite absorber and copper
Sheng Hsiung Chang1, Kuen-Feng Lin2, Chien-Hung Chiang1
1Research Center for New Generation Photovoltaics, National Central University, No. 300 Jhongda Road, Jhongli, Taoyuan County 32001, Taiwan.
Abstract:
The refractive index and extinction coefficient of a triiodide perovskite absorber (TPA) were obtained by fitting the transmittance spectra of TPA/PEDOT:PSS/ITO/glass using the transfer matrix method. Cu nanoplasmonic structures were designed to enhance the exciton generation in the TPA and to simultaneously reduce the film thickness of the TPA. Excitons were effectively generated at the interface between TPA and Cu nanoparticles, as observed through the 3D finite-difference time-domain method. The exciton distribution is advantageous for the exciton dissociation and carrier transport.
