北京交通大学光电子技术研究所 发光与光信息技术教育部重点实验室, 北京 100044
通过逐层旋涂的方法, 制备了P3HT(poly(3-hexylthiophene))与PMMA(poly(methylmethacrylate))双层器件, 并与二者的共混溶液制备的器件进行了性能对比。利用扫描电镜(SEM)表征了双层器件的横截面形貌; 利用电流-电压(I-V)以及电流-读取次数(I-t)测试, 测量了两种器件的开关比以及持续时间特性。其中, 双层器件具有更好的开关比, 可达1×103, 同时反复读写测试表明器件性能非常稳定。为了解释电双稳现象产生的机理, 对双层结构器件的电流-电压曲线进行了线性拟合, 利用器件的能级图进行分析, 得出了电荷在器件中的传输过程。研究结果表明, 可以通过电荷俘获释放理论解释P3HT/PMMA双层器件电双稳特性产生的机理。
有机电双稳器件 相分离 电荷俘获释放理论 P3HT P3HT PMMA PMMA organic bistable devices phase separation charge trapping-detrapping theory
Author Affiliations
Abstract
1 School of Applied Sciences, Harbin University of Science and Technology, Harbin 150080, China
2 School of Information Engineering, Minzu University of China, Beijing 100081, China
3 Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
In this paper, we present the design, simulation, fabrication and characterization of a terahertz (THz) filter based on metamaterial consisting of the periodical double symmetric splits ring resonator (DS-SRR) array. We can observe that the metamaterial-based filter possesses a band-pass transmission when the electrical field is along y direction, and it possesses a low-pass transmission when the electrical field is along x direction. Our results demonstrate that the proposed filter can realize the switching between band-pass effect and low-pass effect by only changing the polarization direction of the incident electromagnetic wave. Moreover, the calculated surface current distributions are also used to analyze the switchable mechanism of the THz metamatrial filter. Therefore, the proposed THz wave filter has a potential application in THz wave communication systems.
光电子快报(英文版)
2015, 11(1): 33