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Annealed Treatment Effect in Poly(3-hexylthiophene):Methanofullerene Solar Cells

Yu Huang-Zhong1,2 and Peng Jun-Biao1

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Polymer photovoltaic devices based on poly(3-hexylthiophene) (P3HT) : [6,6]-phenyl-C61-butyricacid methyl ester (PCBM) 1:1 weight-ratio blend are reported. The effects of various annealing treatments on the device performance are investigated. Thermal annealing shows significant improvement of the device performances. For devices at 130°C annealing, maximum power conversion efficiency (PCE) of 3.3% and fill factor up to 60.3% is achieved under air mass 1.5, 100 mW/cm2 illumination. We discuss the effect of thermal annealing by the results of ultraviolet-visible absorption spectroscopy (UV-vis), dark current-voltage curve, atomic force microscopy (AFM).


PACS

81.40.Ef Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization

78.40.Me Organic compounds and polymers

72.80.Le Polymers; organic compounds (including organic semiconductors)

84.60.Jt Photoelectric conversion: solar cells and arrays

68.37.Ps Atomic force microscopy (AFM)

72.40.+w Photoconduction and photovoltaic effects

Subjects

Soft matter, liquids and polymers

Electronics and devices

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Condensed matter: structural, mechanical & thermal

Dates

Issue 4 (April 2008)

Received 7 November 2007



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