High Efficiency of Dye-Sensitized Solar Cells Based on Ruthenium and Metal-Free Dyes

Abstract

The influence of using different concentrations of triazoloisoquinoline based small molecule as coadsorbent to modify the monolayer of a TiO 2 semiconductor on the performance of a dye-sensitized solar cell is studied. The co-adsorbent significantly enhances the open-circuit photovoltage (oc), the short circuit photocurrent density (sc) the solar energy conversion efficiency (>). The co-adsorbent 4L is applied successfully to prepare an insulating molecular layer with N719 and achieve high energy conversion efficiency as high as 8.83% at 100 mW cm −2 and AM 1.5 at 1 to 0.25 (N719 : co-adsorbent) molar ratio. The resulting efficiency is about 6% higher than that of a nonadditive device. The result shows that the organic small molecule 4L (2-cyano-3-(5-(4-(3-oxo-[1,2,4]triazolo[3,4-a]isoquinoline-2(3H)-yl)phenyl)thiophene-2-yl)acrylic acid) is the promising candidates for improvement of the performance of dye-sensitized solar cell.

Effect of Solvent Variations in the Alcothermal Synthesis of Template-Free Mesoporous Titania for Dye-Sensitized Solar Cells Applications

“…The relatively poor photocurrent generation of TiMe and TiMe200 cells, when compared to that of other cells presented in this work, can be easily explained by the relatively low amount of adsorbed dye on the surface of the porous electrode (see N dye values collected in Table 2 ), while the behavior of the other TiAlk cells is more complex. The dye loading on the electrodes utilizing TinPr to TisecBu200 prepared materials reveal only slight differences and are similar to those obtained for the TiEt materials and to those which can be found in the literature [ 26 , 41 , 42 ]. This, in turn, indicates that the origin of the different behavior of these cells results from charge recombination/transport phenomena.…”

A High Efficiency Chlorophyll Sensitized Solar Cell with Quasi Solid PVA Based Electrolyte

“…Even with addition of 5 mM CDCA, absorbance is still higher than that observed for chlorophyll without the additive. The absorption results show that the CDCA is a good stabilizing agent for chlorophyll dye [31]. Table 3.…”

“…A good number of reports on the structures and roles of carboxylic acid on optoelectronic performance of DSSC have been found elsewhere [13][14][15][16][17][18]29]. CDCA has been extensively used for devices sensitized with dye [30] and to enhance the open circuit photovoltage, the short circuit photocurrent density, and the efficiency of DSSC [31].…”

Evaluation and Optimization to Recycle Used TiO2Photoelectrode for Dye-Sensitized Solar Cells

“…Since O'Regan and Grätzel successfully proposed dyesensitized solar cells (DSCs) using nanocrystalline structures in 1991 [1], research on such cells has intensified. Most of the extensive literature on DSCs has focused on improving the light to electricity conversion [2,3]. Nevertheless, the ultimate goal is to develop commercial applications.…”