Annealing Effects on Surface-Plasmon-Enhanced Bulk Heterojunction, Organic Photovoltaics

Anthony J. Morfa, Thomas H. Reilly, Kathy L. Rowlen, Jao Van De Lagemaat

Research output: Contribution to conferencePaperpeer-review

2 Scopus Citations


We investigated the ability of silver thin metal films to enhance photovoltaic conversion efficiency in blends of poly-3-hexylthiophene (P3HT) and methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM). By varying the thickness of the silver films and developing a new fabrication routine that involves annealing for long periods of time at low temperatures, we were able to reproducibly enhance photoconversion in P3HT/PCBM devices. Photovoltaic conversion efficiency was monitored using internal photon-to-current conversion efficiency (IPCE) and current-voltage measurements. We observed that plasmonic materials were able to enhance the conversion efficiencies of organic, bulk heterojunction devices. The relationship between the surface plasmon resonance wavelength and overall device performance is also presented with IPCE data. These preliminary studies indicate that plasmonic enhancement in bulk heterojunction devices show promise to improve the viability of organic solar cells.

Original languageAmerican English
Number of pages8
StatePublished - 2007
EventOrganic Photovoltaics VIII - San Diego, CA, United States
Duration: 28 Aug 200730 Aug 2007


ConferenceOrganic Photovoltaics VIII
Country/TerritoryUnited States
CitySan Diego, CA

NREL Publication Number

  • NREL/CP-270-42121


  • fabrication
  • photoconversion
  • plasmonic materials
  • silver thin metal films


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