Energy Antenna for Efficient Dye-Sensitized Solar Cells.
In this study, we investigated the effect of the placement of acceptor in dual donor based dye sensitizers (TPA-PTZ-CN, PTZ-TPA-CN). Triphenylamine (TPA) and phenothiazine (PTZ) are well known as electron donors and cyanoacetic acid (CN) is a known electron acceptor. The absorption spectrum of the dyes showed different form because of the different energy levels of molecular orbital (MO) of each dye and intramolecular energy transfer (EnT). The absorption spectrum of PTZ-TPA-CN was broader than that of TPA-PTZ-CN and its molar extinction coefficient was also higher than TPA-PTZ-CN. Because of its enhanced panchromatic absorption spectra, PTZ-TPA-CN showed better photovoltaic properties than the other dyes did. This work presents that optimizing the placement of acceptor in dual donor based dye would give good photovoltaic properties for dye-sensitized solar cells (DSSC).
Dong Yuel
DY
Kwon
Dong Min
DM
Chang
Young Sik
YS
Kim