碳纳米管掺杂对聚合物聚(2-甲氧基-5-辛氧基)对苯乙炔-PbSe量子点复合材料性能的影响  

Effect of carbon nanotubes on the properties of polymer MOPPV-PbSe quantum dot composites

作　　者：屈俊荣[1] 郑建邦[1] 王春锋[1] 吴广荣[1] 王雪艳[1] 

机构地区：[1]西北工业大学应用物理系,陕西省光信息技术重点实验室,西安710072

出　　处：《物理学报》2013年第12期502-508,共7页Acta Physica Sinica

基　　金：西北工业大学博士论文创新基金(批准号:CX201324)~~

摘　　要：基于碳纳米管的良好导电性、激子传输性能和量子点聚合物复合材料高的光电转换性能,采用原位缩合法制备了聚合物聚(2-甲氧基-5-辛氧基)-对苯乙炔(MOPPV)功能化碳纳米管(SWNT)-PbSe量子点复合材料,通过对复合材料的X射线衍射、透射电子显微镜和紫外可见吸收光谱研究,发现MOPPV,SWNT与PbSe量子点可以有效地复合,且SWNT与MOPPV形成网状结构;PbSe量子点尺寸为5.75nm,其可均匀地分散在MOPPV-SWNT基体中形成包覆或镶嵌结构,并发生了光诱导电荷转移.通过对复合材料的光电性能研究发现,当MOPPV,SWNT,PbSe三者的质量比为1:0.3:1时其光电性能最好,开路电压为0.556V,短路电流为2.133mA,填充因子为34.48%,转换效率为0.452%,与聚合物MOPPV-PbSe量子点复合材料材料相比,光电性能提高了2—3倍.According to single-wailed carbon nanotube good conductivity, baryon transmission performance, and high photoelectric con- version performance of quantum dot composite material, in this letter, we use in situ condensation method to prepare polymer/poly （2-methoxy, 5-oc-toxy）-l, 4-phenylenevinylene （MOPPV）-single walled carbon nanotubes/PbSe quantum dot composites and use X- ray diffraction, transmissionelectron microscope, UV-vis absorption spectroscopy to study their characteristics. The results indicate that MOPPV, SWNT and PbSe quantum dots can be effectively combined, especially the SWNT and MOPPV form a network struc- ture in MOPPV matrix, and PbSe quantum dots, each with an average size of 5.75 nm, can be dispersed to form a coating or mosaic structure in the polymer substrate of MOPPV-SWNT, producing the light induced charge transfer phenomenon. The study of compos- ite photoelectric performance shows that when the polymer MOPPV, SWNT, PbSe have their mass ratio of 1 ： 0.3 ： 1, the composite photoelectric performance is best： open circuit voltage is 0.556 V, short circuit current is 2.133 mA, fill factor is 34.48%, conversion efficiency is 0.452%. Compared with the polymer MOPPV-PbSe quantum dots composite materials, the optoelectronic properties are increased by 2-3 times.

关 键 词：量子点 碳纳米管 复合材料 转换效率 

分 类 号：TB383.1[一般工业技术—材料科学与工程]