Novel di-anchoring dye for DSSC by bridging of two mono anchoring dye molecules: A conformational approach to reduce aggregation

Novel organic dyes based on thioindigo for dye-sensitized solar cells

“…The wavelength of maximum absorption (λ max ) for synthesized dyes are higher than thiophen-based dyes for example, HY1-HY2 (426-440 nm) [16] due to the presence of carbonyl groups in the structure of the thioindigo organic dyes. Upon dye adsorption on to a TiO 2 surface, the wavelength of maximum absorption is bathochromically shifted by 20 and 24.5 for D1 and D2, respectively as compared to the corresponding spectra in solution, implying that dyes adsorbed on the TiO 2 photoelectrode surface contain partial J-type aggregates [17][18][19]. The molar extinction coefficients of D1 and D2 in THF at their respective λ max are also shown in Table 1, indicating that these novel dyes have good light harvesting abilities.…”

Novel pyran based dyes for application in dye sensitized solar cells

“…The presence of two carboxyl groups is expected to strengthen the binding of the photosensitizers to titania, possibly resulting in the enhancement of electron transfer and cell performance, as shown in the literature [30][31][32][33]. The synthesized chromophores have been characterized by optical and electrochemical measurements; their electronic structure has been analysed by Density Functional Theory (DFT) and their efficiencies in DSSC tested under simulated sun radiation.…”

Multichromophoric sensitizers based on calix[4]arene scaffold and 4 H -pyranylidene moiety for DSSCs application

“…of an electron withdrawing cyano group near the anchoring carboxylic acid group that enhances the spectral response through intramolecular charge transfer (ICT) and its good electron injection properties [23][24][25][26][27].…”

“…The π-bridge plays an important role in tuning the main photochemical properties [19][20][21][22][23] of the sensitizer and it is commonly used with the aim to expand the solar cell absorption spectrum to the red region of the sun light. The use of thiophene-based π-bridge also affords chemical stability to the final dye.…”