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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.
Based on the good conductivity of CNTs, the exciton transport properties and the high photoelectric conversion properties of QDs, the poly (2-methoxy-5-octyloxy) - The MOPPV functionalized carbon nanotubes (SWNTs) -PbSe QDs were characterized by X-ray diffraction, transmission electron microscopy and UV-Vis absorption spectra. The results show that MOPPV, SWNTs and PbSe quantum dots are effective And the SWNT and MOPPV form a network structure. The size of the PbSe quantum dots is 5.75 nm, which can be uniformly dispersed in the MOPPV-SWNT matrix to form a coated or damascene structure, and photoinduced charge transfer occurs. The photoelectric properties of MOPPV, SWNT and PbSe were investigated. The results showed that the optoelectronic properties were best when the mass ratio of MOPPV, SWNT and PbSe was 1: 0.3: 1, the open circuit voltage was 0.556V, the short circuit current was 2.133mA, the fill factor was 34.48% Is 0.452%. Compared with the polymer MOPPV-PbSe quantum dot composite material, the photoelectric performance is improved 2-3 times.