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PANI的内光电发射
Authors
吴玲玲
张红平
+3 more
林仲华
罗瑾
黄怀国
Publication date
15 April 2002
Publisher
Abstract
利用电化学方法在自组装一层对氨基硫醇 (PATP)的金电极上制备三种氧化还原态的聚苯胺 (PANI)膜 . PANI膜底层比较致密 ,表面呈山包状 ,该膜在 K3Fe(CN) 6 /K4 Fe(CN) 6 溶液的循环伏安图表明了部分氧化态 PANI膜具有良好的电子传输性能 .从光电流谱得到氧化态 PANI的禁带能为 1 .45 e V.首次发现部分氧化态 PANI膜的光电流谱遵循 Fowler定律 (IPCE1 / 2 ~ hν呈线性 ) ,具有内光电发射的性质 .通过 Fowler图得出部分氧化态 PANI的绝缘母体的禁带宽度为 3 .3 3 e V,并且证实该绝缘母体为还原态 PANI.从 Mott-Schottky图得到部分氧化态和还原态 PANI的平带电位都为 0 .63 V(vs. SCE) .提出了和 PANI的颗粒金属岛导电模型一致的内光电发射机理来解释部分氧化态 PANI的光电化学过
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Last time updated on 16/06/2016