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

Abstract

Three new zinc porphyrin dyes attached to ethynyl benzoic acid as an electron transmission and anchoring group have been designed, synthesized, and well-characterized. The performances of their sensitized solar cells have been investigated by optical, photovoltaic, and electrochemical methods. The photoelectric conversion efficiency of the solar cells sensitized by the dye with salicylic acid as an anchoring group demonstrated obvious enhancement when compared with that sensitized by the dye with carboxylic acid as an anchoring group. The density functional theory calculations and the electrochemical impedance spectroscopies revealed that tridentate binding modes could increase the efficiency of electron injection from dyes to the TiO2 nanoparticles by more electron pathways.

Tropolone as a High‐Performance Robust Anchoring Group for Dye‐Sensitized Solar Cells

“…Notably, YD2-o-C8T showed the highest h value among porphyrin DSSCs with anchoring groups other than ac arboxylic acid. [7,15] We applied electrical impedance spectroscopy (EIS) to rationalize the difference in the open-circuit voltage (V OC )of [a] Values given are the photovoltaic parameters for which the highest h value was observed.T he average value from five independent experiments is shown in parenthesis in each case.…”

Synthesis of Porphyrin and Bacteriochlorin Glycoconjugates through CuAAC Reaction Tuning

“…As an extension of our efforts to synthesize carbohydrate porphyrin and phthalocyanines conjugates (CPC's and CPcC's respectively), we sought to use a similar copper(I)‐catalyzed 1,3‐dipolar cycloaddition protocol to create CPCs without the use of a “spacer” (Scheme ). Our initial objective was to employ alkynylated porphyrin‐based scaffolds, such as (5‐ethynyl‐10,20‐diphenyldiporphinato)zinc(II) and [5,15‐bis(ethynyl)‐10,20‐diphenylporphinato]zinc(II) (mDPP, 1 , and dDPP, 2 , respectively) and (2‐ethynyl‐5,10,15,20‐tetraphenylporphinato)zinc(II) (bTPP, 3 [19b], in combination with acetate‐protected glycosyl azides ( 4–7 ) as seen in Scheme . We opted to use zinc‐based porphyrins because it is well known that copper can readily insert into the porphyrin ring thereby inhibiting the copper‐catalyzed 1,3‐dipolar cycloaddition process.…”

“…General Considerations: All starting materials were synthesized following published literature procedures, , from commercially available reagents and solvents. 1 H NMR and 13 C NMR were obtained using a Bruker Advance III 400 with Sample Xpress Lite autosampler.…”

Tropolone as a High‐Performance Robust Anchoring Group for Dye‐Sensitized Solar Cells

“…[5c, 14] Thephotocurrent-voltage characteristics of the DSSCs based on YD2-o-C8T and YD2-o-C8 under the optimized conditions are depicted in Figure 2. [7,15] We applied electrical impedance spectroscopy (EIS) to rationalize the difference in the open-circuit voltage (V OC )of . Detailed photovoltaic parameters are listed in Table 2.…”