掺杂PbSe/PVA量子点的光致聚合物全息特性

聂慧丽; 李若平; 李海柱; 朱治广; 尉乔南; 黄明举

doi:doi:10.3788/gzxb20154404.0409002

光子学报, 2015, 44 (4): 0409002, 网络出版: 2015-04-28

掺杂PbSe/PVA量子点的光致聚合物全息特性

Holographic Properties of Photopolymer Doped PbSe / PVA Quantum Dots

论文大纲

聂慧丽 ^*李若平李海柱朱治广尉乔南黄明举

作者单位

河南大学物理与电子学院河南省光电信息材料与器件重点学科开放实验室, 河南开封 475004

全息存储光致聚合物材料实验法衍射效率 Holographic storage Photopolymer materials Experimental methods PbSe PbSe Diffraction efficiency

摘要

通过原位合成法以聚乙烯醇辅助合成了6.5 nm、10 nm和15 nm的PbSe量子点, 研究了掺杂PbSe量子点的光致聚合物的全息特性.将三种尺寸的PbSe量子点按不同浓度分别掺入光致聚合物中, 制成无机-有机复合型光致聚合物膜, 并对其全息性能进行研究.复合聚合物膜的UV-Vis吸收光谱表明掺入的PbSe量子点并未与聚合物中的有机组分发生化学反应.采用氩氪离子激光器输出的647 nm红光研究了复合聚合物膜的透过率和全息记录光栅的布喇格偏移与衍射效率.透过率曲线表明PbSe量子点在复合聚合物膜中分散良好, 膜表面均匀.由于PbSe量子点在聚合物链中起支撑作用, 复合聚合物膜在全息记录过程中不易发生形变, 从而增加了聚合物膜的抗缩皱能力.衍射效率曲线表明掺入PbSe量子点的复合聚合物膜的衍射效率比未掺杂的有所提高.此外, 体系存在一个最优值, 当掺入平均粒径为10 nm且浓度为3.6×10-6 mol/L的PbSe量子点时, 样品的透过率达到84%, 衍射效率从67.2%提升到89.7%, 缩皱率降低到0.8%, 极大提高了材料的全息性能.

Abstract

PbSe quantum dots,6.5nm,10nm and 15nm,were synthesized in polyvinyl alcohol by in-situ synthesis method, the holographic performance of photopolymer doped PbSe quantum dots was researched. The three sizes of PbSe quantum dots with different concentration were incorporated in photopolymer,and inorganic-organic hybrid photopolymer films were prepared.It can be seen from the UV-Vis absorption spectrum of composite photopolymer films that the incorporation of PbSe quantum dots do not react with other components to produce new substance.Transmittance of hybrid photopolymer films were measured by Argon-krypton ion laser with a wavelength of 647 nm,as well as the diffraction efficiency and the Bragg mismatch of holographic recording grating.It can be obtained that the hybrid photopolymer films are uniform and PbSe quantum dots disperse well by transmittance curves.The anti-wrinkle effect of hybrid photopolymer films is due to the PbSe quantum dots which play a supportive role in the photopolymer chain,so that the strain is difficult to generate in the holographic recording process,and the photopolymer films anti-wrinkle capability is increased.The incorporation of PbSe quantum dots improve the diffraction efficiency compare with un-doped samples from diffraction efficiency curves.Additionally,there exists the optimum size and concentration of PbSe quantum dots,the maximum diffraction efficiency of samples can be raised from 67.2% to 89.7%,the volume shrinkage can be depressed to 0.8% under conditions that the average size of PbSe quantum dots is about 10 nm and the concentration of PbSe quantum dots is 3.6×10-6 mol/L.In conclusion,the incorporation of PbSe quantum dots greatly improve the holographic performance of materials.

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聂慧丽, 李若平, 李海柱, 朱治广, 尉乔南, 黄明举. 掺杂PbSe/PVA量子点的光致聚合物全息特性[J]. 光子学报, 2015, 44(4): 0409002. NIE Hui-li, LI Ruo-ping, LI Hai-zhu, ZHU Zhi-guang, WEI Qiao-nan, HUANG Ming-ju. Holographic Properties of Photopolymer Doped PbSe / PVA Quantum Dots[J]. ACTA PHOTONICA SINICA, 2015, 44(4): 0409002.

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