TY - DATA T1 - An Organic D-π-A Dye for Record Efficiency Solid-State Sensitized Heterojunction Solar Cells PY - 2011/04/13 AU - Ning Cai AU - Soo-Jin Moon AU - Lê Cevey-Ha AU - Thomas Moehl AU - Robin Humphry-Baker AU - Peng Wang AU - Shaik M. Zakeeruddin AU - Michael Grätzel UR - https://acs.figshare.com/articles/journal_contribution/An_Organic_D_A_Dye_for_Record_Efficiency_Solid_State_Sensitized_Heterojunction_Solar_Cells/2664655 DO - 10.1021/nl104034e.s001 L4 - https://ndownloader.figshare.com/files/4326529 KW - power conversion efficiency KW - NREL KW - AM 1.5 G KW - heterojunction photovoltaic device KW - charge collection efficiency KW - Efficient charge generation KW - photocurrent decay measurements KW - C 220 KW - Transient photovoltage KW - molar absorption coefficient N2 - 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. ER -