Plasmonic circular nanostructure for enhanced light absorption in organic solar cells

Nan Fu Chiu*, Cheng Hung Hou, Chih Jen Cheng, Feng Yu Tsai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


This study attempts to enhance broadband absorption in advanced plasmonic circular nanostructures (PCN). Experimental results indicate that the concentric circular metallic gratings can enhance broadband optical absorption, due to the structure geometry and the excitation of surface plasmon mode. The interaction between plasmonic enhancement and the absorption characteristics of the organic materials (P3HT:PCBM and PEDOT:PSS) are also examined. According to those results, the organic material's overall optical absorption can be significantly enhanced by up to 51% over that of a planar device. Additionally, organic materials are enhanced to a maximum of 65% for PCN grating pitch = 800 nm. As a result of the PCN's enhancement in optical absorption, incorporation of the PCN into P3HT:PCBM-based organic solar cells (OSCs) significantly improved the performance of the solar cells: short-circuit current increased from 10.125 to 12.249 and power conversion efficiency from 3.2% to 4.99%. Furthermore, optimizing the OSCs architectures further improves the performance of the absorption and PCE enhancement.

Original languageEnglish
Article number502576
JournalInternational Journal of Photoenergy
Publication statusPublished - 2013

ASJC Scopus subject areas

  • General Chemistry
  • Atomic and Molecular Physics, and Optics
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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