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The Scientific World Journal
Volume 2014, Article ID 128414, 6 pages
http://dx.doi.org/10.1155/2014/128414
Research Article

Plasmonic Structure Enhanced Exciton Generation at the Interface between the Perovskite Absorber and Copper Nanoparticles

1Research Center for New Generation Photovoltaics, National Central University, No. 300 Jhongda Road, Jhongli, Taoyuan County 32001, Taiwan
2Department of Optics and Photonics, National Central University, No. 300 Jhongda Road, Jhongli, Taoyuan County 32001, Taiwan

Received 30 June 2014; Revised 5 August 2014; Accepted 19 August 2014; Published 11 September 2014

Academic Editor: Rui C. Marques

Copyright © 2014 Sheng Hsiung Chang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.