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Spectroscopic Study on Charge Generation in Bisazo-Based Layered Photoreceptor

机译：双偶氮基层状感光体中电荷产生的光谱学研究

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摘要

A spectroscopic study was carried out on charge generation processes in a multilayered photoreceptor comprising a specific bisazo compound as charge generation material. Photoreceptors comprising a charge generation layer (CGL), composed of a bisazo compound dispersed in a binder resin, and a charge transport layer (CTL) incorporating an electron donor molecule in a binder resin, were treated as model photoreceptors for experimental and numerical analysis. Charge generation model, which had been previously described for a single layer organic photoconductor with charge generation predominately occurring at layer surface, was expanded and applied in a numerical study to a conventional dual layer system. A change in spectral response was observed as a result of variation in CGL thickness for both conventional dual layer and inverted dual layer (CTL overcoated with CGL) systems. These experimental results were compared with numerical simulations in the expanded charge generation model. Analytical results suggested that charge generation sites existed at CGL-CTL interface and that estimated energy diffusion length was much longer than excitoh diffusion length reported for organic materials. Moreover, the author's proposed charge generation model showed superior agreement with experimental results compared to conventional bulk generation model.
机译：在包含特定的双偶氮化合物作为电荷产生材料的多层感光体中，对电荷产生过程进行了光谱研究。将包括由分散在粘合剂树脂中的双偶氮化合物组成的电荷产生层（CGL）和在粘合剂树脂中掺入电子供体分子的电荷传输层（CTL）的感光体作为模型感光体进行实验和数值分析。以前针对单层有机光电导体描述的电荷产生模型，其电荷产生主要发生在层表面，现已扩展并应用于数值研究中的常规双层系统。对于常规的双层和倒置的双层（CTL涂有CGL）系统，由于CGL厚度的变化，导致光谱响应发生了变化。将这些实验结果与扩展电荷生成模型中的数值模拟进行了比较。分析结果表明，电荷生成位点存在于CGL-CTL界面，并且估计的能量扩散长度比有机材料报道的激发扩散长度长得多。此外，与传统的批量产生模型相比，作者提出的电荷产生模型与实验结果显示出优异的一致性。

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  • 来源
    《Journal of Imaging Science and Technology》 |2010年第4期|P.040505.1-040505.6|共6页
  • 作者

    S. Yokota;

  • 作者单位

    Digital Printing Division, Samsung Electronics Co., Ltd., Suwon City 443742, Korea;

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