聚(3-辛基)噻吩/碳纳米管复合材料全光开关特性的研究  

Study on all-optical switching characteristics of 3-octyl polythiophene/carbon nanotubes hybrids

作　　者：孙肖芬[1] 郑建邦[1] 廖威[1] 姜冰一[1] 郝娟[1] 

机构地区：[1]西北工业大学理学院,陕西省光信息技术重点实验室空间应用物理与化学教育部重点实验室,陕西西安710129

出　　处：《功能材料》2011年第B11期859-862,共4页Journal of Functional Materials

基　　金：西北工业大学基础研究基金资助项目(JC200820)

摘　　要：使用多次超声离心分散法将单壁碳纳米管(SWNTs)溶入聚(3-辛基)噻吩(P3OTH)溶液中制得P3OTH/SWNTs复合液(溶剂为四氢呋喃)。研究了该复合液在不同功率及调制频率控制光(532nm)作用下的全光开关特性。实验发现,在7mW、258Hz的控制光调制下,该复合液较P3OTH单体溶液的全光开关调制深度提高了2倍;控制光功率为7mW时,复合液样品在25Hz的控制频率下调制深度可达84%。在此基础上增加控制频率到432.5Hz,该样品的开关响应时间达到1ms,并且可维持40%以上的调制深度;在140Hz时,将控制光功率降低,该复合液样品的调制深度增大,当控制光功率降低到3.6mW时,达到最大值62%。结果表明样品具有良好的全光开关特性,具有潜在的研究及应用价值。Single-walled carbon nanotubes（SWNTs） were dissolved in 3-octyl polythiophene（P3OTH） solution by centrifugation and successions repeatedly in this article.On that basis,the all optical switching（AOS） characteristics of P3OTH/SWNTs complex liquid（dissolvent： tetrahydrofuran） was studied by a 532nm controlling light in different power and modulation frequency.The results showed that the modulation depth（MD） of this complex liquid was 2 times deeper than P3OTH solution while modulated by the same controlling light.Maintain the light power at 7mW,the MD of the complex liquid reached a maximum,84%,in the frequency of 25Hz;the response time was 1ms and the MD dropped to 40% while increased the frequency to 432.5Hz.Kept the frequency in 140Hz,the MD reached a maximum,62%,by reduced the light power to 3.6mW.All the researches indicated a good AOS performance and the potential application value of the P3OTH/SWNTs hybrids.

关 键 词：聚噻吩 碳纳米管 光致电子转移 全光开关 

分 类 号：TB34[一般工业技术—材料科学与工程] O437[机械工程—光学工程]