基于苯胺增塑的聚乙二醇固态电解质染料敏化太阳能电池

Dye-sensitized Solar Cell with Aniline Plasticized Poly(Ethylene Glycol) Solid-state Electrolyte

对聚乙二醇固态电解质进行了苯胺增塑处理。虽然为NaI的不良溶剂,将苯胺掺入到固态电解质中对提高NaI浓度贡献不大,但是由于苯胺分子上的胺基与聚乙二醇主链上醚基团的相互作用破坏了晶态结构,增大自由体积有利于离子迁移,从而能大幅提高离子电导率。同时,Lewis碱性苯胺分子能有效抑制染料敏化太阳能电池(DSSC)暗反应,减少光生电子损耗并提高开路电压。含这种固态电解质的DSSC短路电流、开路电压、填充因子及光电转换效率均高于未增塑的聚乙二醇固态电解质DSSC。

The poly（ethylene glycol）solid-state electrolyte was plasticized with aniline.Although the aniline is a kind of non solvent for NaI,the addition of aniline in solid-state electrolyte could not increase the concentration of NaI,it still improved the ionic conductivity because the interaction of amine group in the aniline with ether group in the poly（ethylene glycol）destroyed the crystalline structure of the poly（ethylene glycol）and increased the free volume,which was beneficial for increasing ionic diffusion ability and ionic conductivity.Moreover,the Lewis basic characteristic of aniline made for suppressing the dark reaction in dye-sensitized solar cell（DSSC）,which could decrease the lost amount of photoelectrons and increase the open-circuit voltage.DSSC with aniline plasticized poly （ethylene glycol）solid-state electrolyte showed enhanced short-circuit current density,open-circuit voltage,fill factor and energy conversion efficiency comparing with that of DSSC with poly（ethylene glycol）solid-state electrolyte.