Anion effect on salt-induced conductivity enhancement of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) films
Anion effect on salt-induced conductivity enhancement of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) films
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DOI：
10.1016/j.orgel.2010.04.007
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发表时间：
2010-06
影响因子：
3.2
通讯作者：
Yijie Xia;Jianyong Ouyang
中科院分区：
文献类型：
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作者：
Yijie Xia;Jianyong Ouyang
导电聚（3，4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）膜的导电性可以通过用某种盐的水溶液（例如CuCl 2或InCl 3）处理而显著增强。盐的阴离子对电导率有明显的增强作用。当使用CuBr 2或InI 3水溶液时，观察到超过1000倍的电导率增强，而当分别使用CuSO 4和Cu（CH 3COO）2水溶液时，电导率增强变得不太显著且可以忽略不计。阴离子对电导增强的影响与阴离子的酸离解常数一致，表明电导增强与盐的离解和阴离子与PEDOT+的缔合有关。具有较高解离度的盐可以有利于阴离子与PEDOT+的缔合，这导致更多PSS链从PEDOT：PSS膜中损失，并且通过盐处理更显著地提高电导率。
The conductivity of conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films could be significantly enhanced through a treatment with aqueous solution of a certain salt, such as CuCl2or InCl3. The anions of the salts had pronounced effect on the conductivity enhancement. Conductivity enhancement by a factor of more than 1000 was observed when CuBr2or InI3aqueous solution was used, while it became less significant and negligible when CuSO4and Cu(CH3COO)2aqueous solutions were used, respectively. The anion effect on the conductivity enhancement is consistent with the acid dissociation constants of the anions, which suggests that the conductivity enhancement is related to the dissociation of the salts and the association of the anions with PEDOT+. A salt with higher dissociation can benefit the association of the anions with PEDOT+, which leads to the loss of more PSS chains from the PEDOT:PSS film and more significant conductivity enhancement by the salt treatment.