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Applied Physics Letters / Volume 97 / Issue 1 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 97, 013107 (2010); doi:10.1063/1.3459961 (3 pages)

Hybrid conjugated polymer solar cells using patterned GaAs nanopillars

Giacomo Mariani1, Ramesh B. Laghumavarapu1, Bertrand Tremolet de Villers2, Joshua Shapiro1, Pradeep Senanayake1, Andrew Lin1, Benjamin J. Schwartz2,3, and Diana L. Huffaker1,3

1Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, California 90095, USA
2Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California 90095, USA
3California NanoSystems Institute, University of California at Los Angeles, Los Angeles, California 90095, USA

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(Received 28 April 2010; accepted 9 June 2010; published online 9 July 2010)

In this work, we study hybrid solar cells based on poly(3-hexylthiophene)-coated GaAs nanopillars grown on a patterned GaAs substrate using selective-area metal organic chemical vapor deposition. The hybrid solar cells show extremely low leakage currents (I ≅ 45 nA @−1V) under dark conditions and an open circuit voltage, short circuit current density, and fill factor of 0.2 V, 8.7 mA/cm2, and 32%, respectively, giving a power conversion efficiency of η = 0.6% under AM 1.5 G illumination. Surface passivation of the GaAs results in further improvement, yielding η = 1.44% under AM 1.5 G illumination. External quantum efficiency measurements of these polymer/inorganic solar cells are also presented.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

conducting polymers, current density, dark conductivity, gallium arsenide, III-V semiconductors, leakage currents, MOCVD, MOCVD coatings, nanostructured materials, organic-inorganic hybrid materials, passivation, solar cells

PACS

  • 88.40.hj

    Efficiency and performance of solar cells

  • 81.65.Rv

    Passivation

  • 72.40.+w

    Photoconduction and photovoltaic effects

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.3459961

PUBLICATION DATA

ISSN:

0003-6951 (print)  
1077-3118 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    J. L. Pau, C. Bayram, P. Giedraitis, R. McClintock, and M. Razeghi, Appl. Phys. Lett. 93, 221104 (2008)APPLAB000093000022221104000001.

    G. R. Lin, Y. C. Chang, E. S. Liu, H. C. Kuo, and H. S. Lin, Appl. Phys. Lett. 90, 181923 (2007)APPLAB000090000018181923000001.


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