期刊
ADVANCED FUNCTIONAL MATERIALS
卷 19, 期 13, 页码 2163-2172出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200900246
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- King Abdullah University of Science and Technology (KAUST) [KUS-C1-018-02]
- United States Air Force
- Swiss National Science Foundation
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.
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