Novel cyclic sulfonium iodide containing siloxane high performance electrolyte for dye-sensitized solar cell

Fast solute diffusivity in ionic liquids with silyl or siloxane groups studied by the transient grating method

“…In fact, the introduction of silyl or siloxane structures in ILs (SiILs) was first reported by Shirota et al [15][16] Since then, many groups have synthesized new types of SiILs and revealed their characteristics. [17][18][19][20][21][22][23][24][25][26][27][28] In the first paper, 15 a novel imidazolium-based cation with a trimethylsilylmethyl group was synthesized and its physical properties were compared to an IL with a neopentyl group on the cation. The only difference in structure between these ILs is one atom on the side chain, with silane in the trimethylsilylmethyl group and carbon in the neopentyl group.…”

Silicone Materials for Flexible Optoelectronic Devices

“…The modified polysiloxanes can be used to improve the optical transparency and thermal stability of electrolytes for dye-sensitized solar cells (DSSC); for example, functionalized with imidazolium iodide [13] and cyclic sulfonium iodide [14] polysiloxanes. The use of poly[(3-N-methylimidazolium-propyl)methylsiloxane-co-dimethylsiloxane]iodides for highly efficient DSSC electrolytes was published in [68].…”

“…A review paper in 2016 [6] described in detail the possibilities of using polysiloxanes in the composition of liquid crystal devices [7,8], computer memory drives [9], organic light emitting diodes (OLED) [10,11], and organic photovoltaic devices [12], including dye synthesized solar cells (DSSC) [6,13,14] and optical waveguides [15,16]. Polysiloxanes could be applied in the field of inkjet printing to create flexible transistors and batteries [17].…”

New Class of Ionic Liquids for Dye-Sensitized Solar Cells

“…The high electronegative 3,3,4,4,5,5,6,6,6,-nonafluorohexyl functional group is designed for making FIL to improve the dye regeneration and facilitate the charge transport by providing a microphase separation (fluorophobic effect) between the long alkyl chains of the amphiphilic dye and the fluorous environment in the electrolyte. Therefore [20], (ii) siloxane pyridinium iodides [21], and (iii) siloxane cyclic sulfonium iodides [22], as the liquid electrolytes for DSSCs. Siloxane chains possessed highly thermal stability (up to 350 o C), relatively low permittivity, excellent flexibility and good amphiphilicity.…”

“…For the case of siloxane cyclic sulfonium iodides (SiCSI) ILs [22], two siloxane moieties with different chain length were separately incorporated between two cyclic sulfonium cations to form SiCSI1 and SiCSI2 ILs, and the SiCSI3 IL is constructed by a siloxane chain sited as the terminal group of one cyclic sulfonium cation. The thermooxidative stabilities of SiCSI ILs were lower than those of SiDII ILs because the bond strength of S + -C in sulfonium was lower than that of N + -C in imidazolium.…”