Patterned redox arrays of polyarylamines. III. Effect of molecular structure and oxidation potential on film morphology and hole-injection in single-layer organic diodes
Patterned redox arrays of polyarylamines. III. Effect of molecular structure and oxidation potential on film morphology and hole-injection in single-layer organic diodes
复制标题
聚芳胺的图案化氧化还原阵列。
DOI：
10.1021/cm040102e
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
G. Szulczewski
中科院分区：
文献类型：
--
作者：
J. C. Li;Kye;S. C. Blackstock;G. Szulczewski
用气相沉积法在银电极上制备了一系列芳胺类有机二极管。在正向偏置下，当超过导通电压时，空穴电流流过二极管。结果表明，空穴注入的开启电压与芳胺的第一氧化电位成正比。结果表明，开启电压随薄膜厚度的增加而线性增加，可能是电场介导的空穴注入机制。分子结构也影响膜的形态，较大的树枝状芳胺往往比较小、更对称的胺生成更光滑、更连续的膜。
A series of organic diodes made from arylamines has been prepared by vapor deposition onto silver electrodes. Under forward bias a hole current flows through the diode when a turn-on voltage is exceeded. The results demonstrate that the turn-on voltage for hole-injection is directly proportional to the first oxidation potential of the arylamine. The turn-on voltage is found to increase linearly with increasing film thickness, suggesting an electric-field-mediated hole-injection mechanism. The molecular structure was also found to influence film morphology with the larger dendritic arylamines tending to produce smoother, more continuous films than those observed from the smaller, more symmetric amines.