Engineering of the electron donor of triarylamine sensitizers for high-performance dye-sensitized solar cells

New efficient tert-butyldiphenyl-4H-pyranylidene sensitizers for DSSCs

“…A great number of promising donor units have been reported in the literature, including carbazole, [6][7][8][9] triphenylamine (TPA), [10][11][12][13] phenothiazine, [14][15][16] indoline, [17][18][19][20] dithiafulvene, 21,22 coumarin [23][24][25] and indenoperylene, 3 among others. However, the syntheses of dyes containing these units are not always straightforward.…”