Direct comparison of charge transport and electronic traps in polymer-fullerene blends under dark and illuminated conditions
Direct comparison of charge transport and electronic traps in polymer-fullerene blends under dark and illuminated conditions
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黑暗和光照条件下聚合物-富勒烯共混物中电荷传输和电子陷阱的直接比较
DOI：
10.1016/j.orgel.2013.11.001
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发表时间：
2014-01-01
影响因子：
3.2
通讯作者：
Liao, Liang-Sheng
中科院分区：
文献类型：
--
作者：
Lou, Yan-Hui;Zhang, Lei;Liao, Liang-Sheng
通过测量温度依赖的电流-电压特性，在黑暗和光照条件下，直接比较了典型聚合物富勒烯共混物聚（3-己基噻吩）（P3 HT）和1-（3-甲氧羰基）-丙基-1-苯基-（6，6）C61（PCBM）的电荷输运和电子陷阱.在暗条件下，电荷输运呈现从欧姆电流到陷阱极限电流的转变。而在相同的偏压下观察到充满陷阱的空间电荷限制电流。通过对陷阱密度和能量分布的微分计算，发现在光照和黑暗条件下，P3 HT：PCBM共混物中不同的电荷输运主要是由于不同的陷阱态分布引起的，这对共混物中的空间电荷和电场有很大的影响。(C)2013爱思唯尔有限公司版权所有。
A direct comparison of charge transport and electronic traps in representative polymerfullerene blend, poly (3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1phenyl-(6,6)C61 (PCBM), is carried out in dark and illuminated conditions based on the measurements of temperature-dependent current-voltage characteristics. In dark condition, the charge transport presents a transition from Ohmic to trap-limited current. While the trap-filled space charge limited current is observed under illumination at the same applied bias. From evaluations of trap density and energy distribution by a differential method, it is reveal that the diverse charge transport in dark and illuminated conditions is mainly caused by the different trap states distribution, which strongly affects the space charges and the electrical field in P3HT: PCBM blends. (C) 2013 Elsevier B.V. All rights reserved.