A Quasi-Solid State DSSC with 10.1% Efficiency through Molecular Design of the Charge-Separation and -Transport.
Organic-based solar cells potentially offer a photovoltaic module with low production costs and low hazard risk of the components. We report organic dye-sensitized solar cells, fabricated with molecular designed indoline dyes in conjunction with highly reactive but robust nitroxide radical molecules as redox mediator in a quasi-solid gel form of the electrolyte. The cells achieve conversion efficiencies of 10.1% at 1 sun, and maintain the output performance even under interior lighting. The indoline dyes, customized by introducing long alkyl chains, specifically interact with the radical mediator to suppress a charge-recombination process at the dye interface. The radical mediator also facilitates the charge-transport with remarkably high electron self-exchange rate even in the quasi-solid state electrolyte to lead to a high fill factor.
Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.|Material Research Laboratory, Panasonic Corporation, Osaka 571-8686, Japan.
Michio
M
Suzuka
Material Research Laboratory, Panasonic Corporation, Osaka 571-8686, Japan.
Naoki
N
Hayashi
Material Research Laboratory, Panasonic Corporation, Osaka 571-8686, Japan.
Takashi
T
Sekiguchi
Kyoto R&D Laboratory, Mitsubishi Paper Mills Limited, Kyoto 617-8666, Japan.
Kouichi
K
Sumioka
Kyoto R&D Laboratory, Mitsubishi Paper Mills Limited, Kyoto 617-8666, Japan.
Masakazu
M
Takata
Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
Noriko
N
Hayo
Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
Hiroki
H
Ikeda
Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
Kenichi
K
Oyaizu
Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan.
Hiroyuki
H
Nishide