Open AccessHigh Excitation Transfer Efficiency from Energy Relay Dyes in Dye-Sensitized Solar Cells
Author(s) -
Brian E. Hardin,
JunHo Yum,
Eric T. Hoke,
Young Chul Jun,
Péter Péchy,
Tomás Torres⊗,
Mark L. Brongersma,
Mohammad Khaja Nazeeruddin,
Michaël Grätzel,
Michael D. McGehee
Publication year - 2010
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/nl1016688
Subject(s) - dye sensitized solar cell , energy conversion efficiency , molar absorptivity , excitation , electrolyte , photochemistry , relay , solubility , materials science , acetonitrile , optoelectronics , solar cell , energy transformation , chemistry , chemical engineering , power (physics) , electrode , organic chemistry , optics , electrical engineering , physics , quantum mechanics , thermodynamics , engineering
The energy relay dye, 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM), was used with a near-infrared sensitizing dye, TT1, to increase the overall power conversion efficiency of a dye-sensitized solar cell (DSC) from 3.5% to 4.5%. The unattached DCM dyes exhibit an average excitation transfer efficiency (ETE) of 96% inside TT1-covered, mesostructured TiO(2) films. Further performance increases were limited by the solubility of DCM in an acetonitrile based electrolyte. This demonstration shows that energy relay dyes can be efficiently implemented in optimized dye-sensitized solar cells, but also highlights the need to design highly soluble energy relay dyes with high molar extinction coefficients.
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