Six metal-free organic dyes having thiophene (1), benzene-thiophene (2), thiophene-benzene (3), thiophene-pyridine (4), thiophene-thiophene (5), and pyridine (6) linkers between 9,9-dimethylfluorenyl terminal group and α-cyano-acrylic acid anchor were synthesized. Among them, organic dye 5 showed the longest λmax value (424 nm) in UV-Vis absorption spectrum, better incident monochromatic photon-to-current conversion efficiency (IPCE), highest short circuit photocurrent density (JSC, 9.33 mA2/cm2), and highest overall conversion efficiency (η, 3.91%).
- 9,9-Dimethylfluorenyl terminal
- Dye-sensitized solar cells
- Organic dye
- Thiophene linker
- α-Cyanoacrylic acid anchor