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arXiv 1303.4865cond-mat.mtrl-scicond-mat.mes-hall
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利用双光子吸收估算有机光电导体中深陷阱的浓度

Estimation of the concentration of deep traps in organic photoconductors using two-photon absorption

S. V. Novikov, A. R. Tameev, A. V. Vannikov, J. -M. Nunzi

摘要:

通常,无定形有机材料含有高密度的陷阱。陷阱阻碍电荷传输,从而影响有机电子器件的各种工作参数。在本文中,我们提出了一个简单但可靠的方法估计浓度的深陷阱(陷阱,保持载流子的时间远远长于典型的传输时间的设备)。该方法是基于测量的依赖性的总电荷,收集在电极上的总初始电荷,均匀地产生在传输层的光脉冲的作用下。讨论了该方法的优点和局限性,并给出了光电导有机材料聚(2-甲氧基-5-(2 ′-乙基己氧基)-1,4-亚苯基亚乙烯基)(MEH-PPV)中深陷阱密度的估算实例。

英文摘要:

Typically, amorphous organic materials contain high density of traps. Traps hinder charge transport and, hence, affect various working parameters of organic electronic devices. In this paper we suggest a simple but reliable method for the estimation of the concentration of deep traps (traps that keep carriers for a time much longer than the typical transport time of the device). The method is based on the measurement of the dependence of the total charge, collected at the electrode, on the total initial charge, uniformly generated in the transport layer under the action of a light pulse. Advantages and limitations of the method are discussed and an experimental example of the estimation of the density of deep traps in photoconductive organic material poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene (MEH-PPV) is provided.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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