An organic D-π-A dye for record efficiency solid-state sensitized heterojunction solar cells.
basic_science · Level V
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- Record sourced from PubMed, PMID 21375265.
- Also identified by DOI 10.1021/nl104034e.
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Abstract
The high molar absorption coefficient organic D-π-A dye C220 exhibits more than 6% certified electric power conversion efficiency at AM 1.5G solar irradiation (100 mW cm(-2)) in a solid-state dye-sensitized solar cell using 2,2',7,7'-tetrakis(N,N-dimethoxyphenylamine)-9,9'-spirobifluorene (spiro-MeOTAD) as the organic hole-transporting material. This contributes to a new record (6.08% by NREL) for this type of sensitized heterojunction photovoltaic device. Efficient charge generation is proved by incident photon-to-current conversion efficiency spectra. Transient photovoltage and photocurrent decay measurements showed that the enhanced performance achieved with C220 partially stems from the high charge collection efficiency over a wide potential range.
Medical subject headings
- Coloring Agents
- Electric Power Supplies
- Semiconductors
- Solar Energy