Photorefractivity in a Bi-functional Polymer Nanocomposites Sensitized by CdS Nanoparticle

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 25; no. 4; pp. 550 - 554
• Main Authors: Ding, Liyun, Huang, Lanfen, Zhong, Yunming
• Format: Journal Article
• Language: English
• Published: Heidelberg Wuhan University of Technology 01.08.2010; Springer Nature B.V
• Subjects: CdS纳米粒子; Chemistry and Materials Science; Materials Science; Nanocomposites; Nanoparticles; 二阶非线性光学; 硝基苯偶氮; 硫化镉纳米粒子; 聚合物纳米复合材料; 高分子纳米复合材料; photorefractive effect; bi-functional polymer; CdS nanoparticles; organic/inorganic hybridized
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-010-0041-z

We report an organic/inorganic hybridized nanocomposite consisting of a bi-functional poly（N-vinyl）-3-[p-nitrophenylazo]carbazolyl serves as a polymeric charge-transporting and second-order nonliner optical matrix, and CdS nanoparticles as photosensitizers to manifest photorefractive （PR） effect. The unpoled PVNPAK film exhibits a second harmonic generation （SHG） coefficient of 4.7 pm/V due to the possibility of self-alignment of the azo chromophore. Significant enhancement of photoconductivity is noticed with the increase of CdS nanoparticles concentration. The photorefractive property of the polymer nanocomposites were determined by two-beam coupling （TBC） experiment. The TBC gain and diffraction efficiency of 11.89 cm-1 and 3.2% were obtained for PVNPAK/CdS at zero electrical field.