Improved light scattering and surface plasmon tuning in amorphous silicon solar cells by double-walled carbon nanotubes

Wei Chen Tu, Yi Tsung Chang, Hsin Ping Wang, Chieh Hung Yang, Chia Tze Huang, Jr Hau He, Si Chen Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Surface plasmon resonance was observed to red shift in hexagonal nanohemisphere Ag array covered by double-walled carbon nanotubes. By altering the density of carbon nanotubes, the surface plasmon resonance can be tuned from 563 nm to 586 nm and the light scattering is enhanced in the spectral range from orange to red. This leads to improved performance of amorphous silicon solar cells deposited on top, which yields a short-circuit current density of 14.07 mA/cm 2 and a power conversion efficiency of 6.55% under the illumination of AM 1.5G. This carbon nanotubes density-dependent surface plasmon shift is attributed to the dielectric constant change around the periodic Ag nanostructure, which can be applied to other solar cell materials by fine-tuning the surface plasmon resonance to enhance the absorption at wavelength where the active layer is less absorptive.

Original languageEnglish
Pages (from-to)200-203
Number of pages4
JournalSolar Energy Materials and Solar Cells
Volume101
DOIs
Publication statusPublished - 2012 Jun 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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