In DSSCs, the sensitizer is a key and unique component with the
function of light harvesting. The spectral response of the sensitizer
overlapped with the solar emission affects the photocurrent of the
device to a large extent; thus the ultravioletevisible absorption of
the dyes D1eD5 were measured in CHCl3solutions (Fig. 2). The
absorption spectrum of the D-p-A type dyeTPA-Rwas included for
comparison. The absorption maxima and extinction coefficients are
summarized inTable 1.
C
NMR spectroscopy. Elemental analysis data was consistent with the
desirable structures.
3.2. Optical, electroch