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Surface Design in Solid‐State Dye Sensitized Solar Cells: Effects of Zwitterionic Co‐adsorbents on Photovoltaic Performance
Author(s) -
Wang Mingkui,
Grätzel Carole,
Moon SooJin,
HumphryBaker Robin,
RossierIten Nathalie,
Zakeeruddin Shaik M.,
Grätzel Michael
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200900246
Subject(s) - materials science , moiety , adsorption , photovoltaic system , dye sensitized solar cell , open circuit voltage , chemical engineering , short circuit , molecule , photochemistry , voltage , organic chemistry , chemistry , electrode , ecology , physics , quantum mechanics , engineering , electrolyte , biology
In solid‐state dye sensitized solar cells (SSDSCs) charge recombination at the dye‐hole transporting material interface plays a critical role in the cell efficiency. For the first time we report on the influence of dipolar co‐adsorbents on the photovoltaic performance of sensitized hetero‐junction solar cells. In the present study, we investigated the effect of two zwitterionic butyric acid derivatives differing only in the polar moiety attached to their common 4 carbon‐chain acid, i.e., 4‐guanidinobutyric acid (GBA) and 4‐aminobutyric acid (ABA). These two molecules were implemented as co‐adsorbents in conjunction with Z907Na dye on the SSDSC. It was found that a Z907Na/GBA dye/co‐adsorbent combination increases both the open circuit voltage ( V oc ) and short‐circuit current density ( J sc ) as compared to using Z907Na dye alone. The Z907Na/ABA dye/co‐adsorbent combination increases the J sc . Impedance and transient photovoltage investigations elucidate the cause of these remarkable observations.