Abstract The plasmonic enhancement of conjugated polymer (CP) based light-emitting device calls for large scale and high quality plasmonic crystals (PlCs). Herein, silver nanocubes with diameters of 55 nm and 100 nm have been respectively assembled into closely packed PlC-55 and PlC-100 through oil-water interfacial assembly method. By coupling with the PlCs, the photoluminescence (PL) of polyfluorene copolymer can be enhanced in a broad range of excitation and emission wavelengths, exhibiting over 10-fold enhancement in PL intensity as the PlC-CP separation is controlled at 11 nm by using polyvinylalcohol as a spacer. The Purcell factors of CPs show both particle size and emission wavelength dependence, where the maximum value of 4.5 are found in CPs that are placed on PlC-100 at wavelengths near the CP emission peak.

中文翻译：

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通过与银纳米立方体的组装等离子体晶体耦合来增强聚芴共聚物的宽发射光谱

摘要 基于共轭聚合物 (CP) 的发光器件的等离子体增强需要大规模和高质量的等离子体晶体 (PlC)。在此，通过油水界面组装方法将直径为55 nm和100 nm的银纳米立方体分别组装成紧密堆积的PlC-55和PlC-100。通过与 PLC 耦合，聚芴共聚物的光致发光 (PL) 可以在广泛的激发和发射波长范围内增强，PL 强度增强 10 倍以上，因为使用聚乙烯醇将 PLC-CP 分离控制在 11 nm作为间隔。CP 的 Purcell 因子显示了粒径和发射波长的相关性，其中最大值 4.5 出现在 CP 上的 CP 中，这些 CP 位于 CP 发射峰值附近的波长处。