Ionic Conduction and Photoisomerization in Azobenzene Langmuir-Blodgett Films Adsorbing Cyanine Dyes
Ionic Conduction and Photoisomerization in Azobenzene Langmuir-Blodgett Films Adsorbing Cyanine Dyes
复制标题
吸附花青染料的偶氮苯 Langmuir-Blodgett 薄膜中的离子传导和光异构化
DOI：
10.1143/jjap.35.4765
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发表时间：
1996
影响因子：
1.5
通讯作者：
Satoshi Kobayashi
中科院分区：
文献类型：
--
作者：
K. Shinbo;T. Kontani;Mitsuhiro Watanabe;Tetsuo Fukami;K. Kato;F. Kaneko;Satoshi Kobayashi
制备了偶氮苯（Az） Langmuir-Blodgett （LB）吸附菁染料（NK-3）的薄膜，并对其电学性能进行了详细的研究。电流-电场特性显示离子跳变传导，瞬态电流特性显示由于移动离子迁移而产生的电流峰。热刺激电流（tsc）也是由于离子空间电荷极化，即移动离子在LB膜中的长距离位移。这些结果表明，Az LB器件的电学性能与器件中的移动离子密切相关。此外，Az分子的异构化也改变了染料的TSC和短路光电流特性。结果表明，离子空间电荷极化和染料的聚集受到异构化的影响。
Azobenzene (Az) Langmuir-Blodgett (LB) films adsorbing cyanine dyes (NK-3) were deposited and the electrical properties were investigated in detail. The current vs electric field characteristics suggested ionic hopping conduction, and the transient current properties showed current peaks due to migration of mobile ions. The thermally stimulated currents (TSCs) were also due to the ionic space charge polarization, that is, displacement of mobile ions over long distances in the LB films. These results indicated that the electrical properties of the Az LB devices are strongly dependent on the mobile ions in the devices. In addition, the TSC and the short-circuit photocurrent properties due to the dyes were also changed by isomerization of the Az molecules. The results showed that the ionic space charge polarization and the aggregates of the dyes were affected by the isomerization.