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Asymmetric tandem organic photovoltaic cells with hybrid planar-mixed molecular heterojunctionsabstract: We demonstrate high-efficiency organic photovoltaic cells by stacking
two hybrid planar-mixed molecular heterojunction cells in series.
Absorption of incident light is maximized by locating the subcell tuned
to absorb long-wavelength light nearest to the transparent anode, and
tuning the second subcell closest to the reflecting metal cathode to
preferentially absorb short-wavelength solar energy. Using the donor,
copper phthalocyanine, and the acceptor, C
60, we achieve a maximum power conversion efficiency of
ηP=(5.7±0.3)% under 1 sun simulated AM1.5G solar illumination. An open-circuit voltage of
VOC⩽1.2 V
is obtained, doubling that of a single cell. Analytical models suggest
that power conversion efficiencies exceeding 6.5% can be obtained by
this architecture.
link:
http://apl.aip.org/resource/1/applab/v85/i23/p5757_s1?isAuthorized=noThank you nhieu nhieu
Sat Mar 28, 2015 9:37 pm by hoangtho9x
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