Electrical bistability and charge-transport mechanisms in cuprous sulfide nanosphere-poly(N-vinylcarbazole) composite films
Electrical bistability and charge-transport mechanisms in cuprous sulfide nanosphere-poly(N-vinylcarbazole) composite films
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DOI：
10.1007/s11051-011-0640-4
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发表时间：
2011-11
影响因子：
2.5
通讯作者：
A. Tang;F. Teng;Jie Liu;Yichao Wang;Hongshang Peng;Yanbing Hou;Yongsheng Wang
中科院分区：
文献类型：
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作者：
A. Tang;F. Teng;Jie Liu;Yichao Wang;Hongshang Peng;Yanbing Hou;Yongsheng Wang
在这项研究中，通过将硫化亚铜（Cu 2S）纳米球的平均尺寸小于10 nm的聚（N-乙烯基咔唑）（PVK）矩阵制造的电致变色器件。在器件的电流-电压曲线中清楚地观察到显著的电双稳态，这是由于电场诱导的十二硫醇封端的Cu 2S纳米球和PVK之间的电荷转移。最大开/关电流比可达104，与Cu 2S纳米球与PVK的质量比、扫描电压的幅值和膜厚有关。根据实验结果，采用不同的有机电子学理论模型，对电致变色器件的电荷输运机理进行了描述。
In this study, electrically bistable devices were fabricated by incorporating cuprous sulfide (Cu2S) nanospheres with mean size less than 10 nm into a poly(N-vinylcarbazole) (PVK) matrix. A remarkable electrical bistability was clearly observed in the current–voltage curves of the devices due to an electric-field-induced charge transfer between the dodecanethiol-capped Cu2S nanospheres and PVK. The maximum ON/OFF current ratio reached up to value as large as 104, which was dependent on the mass ratios of Cu2S nanospheres to PVK, the amplitude of the scanning voltages, and the film thickness. The charge-transport mechanisms of the electrically bistable devices were described on the basis of the experimental results using different theoretical models of organic electronics.