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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
纸质出版日期:2016-9-5,
收稿日期:2016-3-8,
修回日期:2016-4-22,
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彭博, 曹亚鹏, 胡煜峰等. P3HT/PMMA双层聚合物电双稳器件的研究[J]. 发光学报, 2016,37(9): 1090-1096
PENG Bo, CAO Ya-peng, HU Yu-feng etc. Polymer Bistable Devices Based on Poly(3-hexylthiophene)/Poly(methylmethacrylate) Bilayer Films[J]. Chinese Journal of Luminescence, 2016,37(9): 1090-1096
彭博, 曹亚鹏, 胡煜峰等. P3HT/PMMA双层聚合物电双稳器件的研究[J]. 发光学报, 2016,37(9): 1090-1096 DOI: 10.3788/fgxb20163709.1090.
PENG Bo, CAO Ya-peng, HU Yu-feng etc. Polymer Bistable Devices Based on Poly(3-hexylthiophene)/Poly(methylmethacrylate) Bilayer Films[J]. Chinese Journal of Luminescence, 2016,37(9): 1090-1096 DOI: 10.3788/fgxb20163709.1090.
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110
3
,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。
P3HT/PMMA bilayer device was fabricated through layer by layer spin-coating method and the device performance was greatly enhanced comparing with P3HT and PMMA single layer device. SEM image was taken to study the cross-section morphology of the bilayer film. The current-voltage (
I-V
) and current-repeatable times (
I-t
) measurements were taken to investigate the performance of the devices. The bilayer one has a better ON/OFF ratio about 110
3
and the device is quite stable. The fitting of
I-V
curves was utilized to analyze the charge transport process with the help of the diagram of the energy bands. The results show that the charge trapping-detrapping theory can be used to explain the operating mechanism of the bilayer device.
P3HTPMMA有机电双稳器件相分离电荷俘获释放理论
P3HTPMMAorganic bistable devicesphase separationcharge trapping-detrapping theory
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