Theoretical Study of Betalain Compounds from Binahong with a Red Trunk as DSSC (Dye-Sensitized Solar Cell) Material with the DFT (Density Functional Theory) Method

: Binahong with a red trunk is known to contain betalain which has the potential to be used as DSSC. Therefore, theoretical research was conducted on the potential content of betalain in binahong with a red trunk using computational methods. This research was conducted using density functional theory (DFT) with the B3LYP functional and with a base set of 6-311G(d). The band gap value of HOMO-LUMO was obtained as a reference for the effectiveness of binahong with a red trunk as a DSSC material. The results of this study indicate the band gap of betalain is 3.152685477 eV. The band gap shows how easy it is for betalain to excite electrons, from the band gap it can be concluded that betalain is a material that has a very high potential for effectiveness as a material for making DSSC.