Plasmon enhancement of bulk heterojunction organic photovoltaic devices by electrode modification | Zendy

Xiaohong Chen | Zendy; Chunchang Zhao | Zendy; Lewis J. Rothberg | Zendy; ManKit Ng | Zendy

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Plasmon enhancement of bulk heterojunction organic photovoltaic devices by electrode modification

Author(s) -

Xiaohong Chen,

Chunchang Zhao,

Lewis J. Rothberg,

ManKit Ng

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2988190

Subject(s) - photocurrent , materials science , optoelectronics , electrode , energy conversion efficiency , plasmon , polymer solar cell , evaporation , absorption (acoustics) , polymer , layer (electronics) , active layer , thin film , heterojunction , photoconductivity , photovoltaic system , nanotechnology , chemistry , composite material , ecology , physics , biology , thermodynamics , thin film transistor

The efficiency of photovoltaic devices fabricated from blends of regioregular poly(3-hexylthiophene) and {6,6}-phenyl C61-butyric acid methylester was improved by introducing a thin Au layer and LiF spacer prior to evaporation of Al contacts onto the polymer blend. Using an optimized Au/LiF/Al electrode gave a 20%–30% improved power efficiency over devices with only LiF/Al for AM1.5 irradiation. The increased efficiency is primarily due to the increased photocurrent, and we present spectroscopic data suggesting that this can be ascribed to plasmon enhancement of the polymer absorption by nanotextured Au.

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