High-haze optical polymer diffusers have attracted great attention in terms of application in surface color-conversion films for lighting and displays. An optical diffuser based on polystyrene-fiber rods (PFRs) dispersed in polydimethylsiloxane (PDMS) resin is presented in this study. Using a simple electrospinning and emulsion shear fabrication process, composite films having optical diffusion properties were fabricated owing to index-mismatching between the PFRs and PDMS. During mechanical shearing, it is demonstrated that the rotation speed is the important parameter affecting the length of the PFRs. PFRs are uniformly dispersed in the PDMS matrix as an excellent filler to provide excellent light-scattering performance. The obtained composite films having low concentrations of PFRs (less than 1 wt %) exhibit highly efficient light diffusion in the visible-light region. At a 0.5 wt % PFR concentration, the composite film realizes a high haze of 87.4% while maintaining a high diffuse transmittance of 81.8% at 550 nm simultaneously. The PFRs were then filled in the quantum dot (QD) films for enhancing the photoluminescence (PL) intensity, thus demonstrating their light management ability. Compared to the reference, the PFRs/PDMS film with a 1 wt % concentration provides a 1.98 times PL intensity enhancement. While applying to the QD-based LEDs, the luminous flux of the QD-based LEDs exhibited the greatest improvement, demonstrating an enhancement of 11.37% at a 0.4 wt % PFR concentration. It exhibits potential for optical performance improvement in QD-based light-emitting diodes.

中文翻译：

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用于量子点转换发光二极管光学增强的聚苯乙烯-纤维棒混合复合结构

高雾度光学聚合物漫射体在用于照明和显示器的表面颜色转换膜中的应用引起了极大的关注。本研究介绍了一种基于分散在聚二甲基硅氧烷 (PDMS) 树脂中的聚苯乙烯纤维棒 (PFR) 的光扩散器。使用简单的静电纺丝和乳液剪切制造工艺，由于 PFR 和 PDMS 之间的折射率不匹配，制造了具有光学扩散特性的复合薄膜。在机械剪切过程中，证明了转速是影响 PFR 长度的重要参数。PFRs 作为出色的填料均匀分散在 PDMS 基质中，可提供出色的光散射性能。所获得的具有低浓度 PFR (小于 1 wt%) 的复合膜在可见光区域表现出高效的光扩散。在 0.5 wt% PFR 浓度下，复合膜实现了 87.4% 的高雾度，同时在 550 nm 处保持了 81.8% 的高漫透射率。然后将 PFR 填充到量子点 (QD) 薄膜中以增强光致发光 (PL) 强度，从而展示它们的光管理能力。与参考相比，1 wt% 浓度的 PFRs/PDMS 薄膜提供了 1.98 倍的 PL 强度增强。在应用于基于 QD 的 LED 时，基于 QD 的 LED 的光通量表现出最大的改进，在 0.4 wt% PFR 浓度下表现出 11.37% 的增强。