Synthesis and evaluation of simple molecule as a co-adsorbent dye for highly efficient co-sensitized solar cells

Cosensitization in Dye-Sensitized Solar Cells

“…Adjusting the molecular structure of the auxiliary dye to increase the number of dye molecules that adsorb onto TiO 2 can also be beneficial. For example, Zhu et al have reported the cosensitization of cyanine dye 182 with the primary dyes 183 or 184 . Dye 182 has a simple molecular structure, and so, it can adsorb onto TiO 2 in between the larger dyes 183 or 184 .…”

“…Zhu et al. have also reported a difference in the level of improvement in PCE of primary dyes 183 and 184 in DSCs when cosensitized with 182 . This disparity was attributed to the presence of competitive adsorption between 183 and 182 , which displaced molecules of 183 adsorbed onto TiO 2 with molecules of 182 .…”

Stepwise co-sensitization of two metal-based sensitizers: probing their competitive adsorption for improving the photovoltaic performance of dye-sensitized solar cells

“…It is noted that screening the co-sensitizers with well-matched molecular structures has gained extensive attentions, since it is widely accepted that the TiO 2 surface can be sufficiently occupied by these sensitizers, dye aggregation effectively restrained and consequently, the improved light-harvesting efficiency and the reduced electron recombination realized. [36][37][38][39][41][42][43][44][45] On the other hand, how to gra two dye molecules with different binding energies and adsorption modes onto TiO 2 surfaces would certainly inuence the performance of the resultant co-sensitized solar cells, since improper loading of two dye molecules to the TiO 2 surface would lead to ineffective dye penetration into the inner of the TiO 2 lm, the imbalanced dye loading amounts, and thus the possible aggregation of the dye molecules on TiO 2 lms. The improved short-circuit current (J sc ) and open-circuit voltage (V oc ) cannot be achieved.…”

Push–Pull N,N-Diphenylhydrazones Bearing Bithiophene or Thienothiophene Spacers as Nonlinear Optical Second Harmonic Generators and as Photosensitizers for Nanocrystalline TiO2 Dye-Sensitized Solar Cells

“… 25 The thiophene units in the π-spacer show excellent charge-transfer properties, efficient π-conjugation, and low geometrical relaxation upon oxidation. 29 , 31 − 47 …”