DFT/TDDFT and Experimental Studies of Natural Pigments Extracted from Black Tea Waste for DSSC Application

<table>Absorbance squared <svg height="18.725" id="M18" style="vertical-align:-2.3205pt" version="1.1" viewbox="0 0 48.5 18.725" width="48.5" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> extrapolated to zero absorption allows determination of optical band gap energy of BTE pigments. (a) Original pigment, (b) acidified pigment.</table>

International Journal of Photoenergy

fig3

Figure 3

Figure 3: DFT/TDDFT and Experimental Studies of Natural Pigments Extracted from Black Tea Waste for DSSC Application 