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首页> 外文期刊>Journal of power sources >Efficient Polysulfide Electrolyte For Cds Quantum Dot-sensitized Solar Cells
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Efficient Polysulfide Electrolyte For Cds Quantum Dot-sensitized Solar Cells

机译:Cds量子点敏化太阳能电池的高效多硫化物电解质

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A polysulfide electrolyte considering simultaneously the penetration of the electrolyte in a mesoscopic TiO_2 film and the ion dissociation in the solution is developed for application in a CdS-sensitized solar cell (CdS-DSSC). A methanol/water (7:3 by volume) solution was found to be a good solvent for fitting the requirement mentioned above. The optimal composition of the electrolyte, based on the performance of the CdS-DSSCs, was found to contain 0.5 M Na_2S, 2 M S, and 0.2 M KCl. By using a photoelectrode prepared after 4 cycles of chemical bath deposition, FTO/TiO2/CdS-4, the efficiency of the CdS-DSSC obtained for this polysulfide electrolyte is 1.15% under the illumination of 100% sun (AM1.5,100 mW cm~(-2)). This efficiency is less than that obtained using I~-/I_3~- redox couple (1.84%), mainly caused from the smaller values of fill factor and open circuit potential. However, the CdS sensitizer is stable and, furthermore, a much higher short circuit current and IPCE (80%) are obtained by using the polysulfide electrolyte.
机译:开发了一种同时考虑电解质在介观的TiO_2膜中的渗透和溶液中离子的离解的多硫化物电解质,用于CdS敏化太阳能电池(CdS-DSSC)。发现甲醇/水(体积比为7:3)是满足上述要求的良好溶剂。基于CdS-DSSC的性能,发现电解质的最佳组成包含0.5 M Na_2S,2 M S和0.2 M KCl。通过使用经过4个化学浴沉积循环后制备的光电极FTO / TiO2 / CdS-4,在100%的太阳光照下(AM1.5,100 mW cm〜 (-2))。该效率低于使用I〜-/ I_3〜-氧化还原对所获得的效率(1.84%),这主要是由于填充系数和开路电势的值较小所致。然而,CdS敏化剂是稳定的,此外,通过使用多硫化物电解质获得了更高的短路电流和IPCE(80%)。

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