蒽掺杂聚苯硅氧烷玻璃的增强光致发光发射。

Enhanced photoluminescence emission from anthracene-doped polyphenylsiloxane glass.

出版信息

Opt Lett. 2013 Dec 15;38(24):5224-7. doi: 10.1364/OL.38.005224.

DOI:10.1364/OL.38.005224

Abstract

Anthracene-doped polyphenylsiloxane (PPS) glass containing silver nanoparticles (AgNPs) of appropriate size was synthesized in a form of solid thin films for modifying light emission characteristics. The photoluminescence (PL) emission from the anthracene molecules at ~2.95 eV was resonantly coupled to the localized surface plasmon (LSP) polariton modes that were induced by the excitation of ~30 nm sized AgNPs. The increase in absorption of incident photons within a highly scattering medium, energy transfer from the localized excitons to the LSP modes, and the electrostatic Coulomb effects of the excitons in the presence of metal NPs all resulted in a significant enhancement of PL emission. The PL enhancement is dependent on the concentration of the anthracene molecules. The integrated PL intensity enhancement at the optimum concentration of anthracene molecules in the PPS glass with AgNPs is found to exceed 50.

摘要

掺杂蒽的聚苯基硅氧烷（PPS）玻璃中含有适量尺寸的银纳米粒子（AgNPs），被合成形成固体薄膜以修饰发光特性。在 ~2.95 eV 的位置，蒽分子的光致发光（PL）发射与由 ~30nm 尺寸的 AgNPs 激发诱导的局域表面等离子体（LSP）极化激元模式发生共振耦合。在高散射介质中，入射光子的吸收增加，局域激子到 LSP 模式的能量转移，以及在金属 NPs 存在下激子的静电库仑效应，都导致了 PL 发射的显著增强。PL 增强取决于蒽分子的浓度。在含有 AgNPs 的 PPS 玻璃中，当蒽分子的最佳浓度时，PL 强度的积分增强被发现超过 50。