Salicylic Acid As a Tridentate Anchoring Group for azo-Bridged Zinc Porphyrin in Dye-Sensitized Solar Cells

Abstract

Two series dyes of azo-bridged zinc porphyrins have been devised, synthesized, and performed in dye-sensitized solar cells, in which salicylic acids and azo groups were introduced as a new anchoring group and π-conjugated bridge via a simple synthetic procedure. The representation of the new dyes has been investigated by optical, photovoltaic, and electrochemical means. The photoelectric conversion efficiency of their DSSC devices has been improved compared with other DSSC devices sensitized by symmetrical porphyrin dyes. The results revealed that tridentate binding modes between salicylic acid and TiO2 nanoparticles could enhance the efficiency of electron injection. The binding modes between salicylic acid and TiO2 nanoparticles may play a crucial role in the photovoltaic performance of DSSCs.

Strategy to Improve Photovoltaic Performance of DSSC Sensitized by Zinc Prophyrin Using Salicylic Acid as a Tridentate Anchoring Group

“…The performance of these dyes with the salicylic acid as a tridentate anchoring group is superior than that with a carboxylic acid as the anchoring group. 26 On the other hand, the orientation of the carboxylic group and hydroxyl group also affects the photoelectric conversion efficiency due to the different transportation mode of electrons that can be clearly seen from the DFT calculation results.…”

Fe–tannic acid complex dye as photo sensitizer for different morphological ZnO based DSSCs

“…TheNyquist plot which has the smaller semicircles at the high frequency is corresponding to the resistance (R ct1 ) at the counter electrode, (Pt)/electrolyte interfaces and the big semicircles at low frequency is related to the charge transfer resistance (R ct2 )of ZnO/dye/electrolyte interface[2,[30][31][32]. The R s is a serial resistance of FTO substrate.…”

Investigation of Vegetable Tannins and Their Iron Complex Dyes for Dye Sensitized Solar Cell Applications

“…The Fe-valonea and Fe-chestnut based solar cells show more favorable electron injection and charge recombination, leading to more effective electron capture, which is partly responsible for photocurrent enhancement and the improved solar cell efficiency [16,52]. The long electron lifetime value indicates the enhanced recombination at the ZnO-electrolyte interface in dye sensitized solar cells [55].…”