State Key Laboratory of Molecular Engineering of Polymers, Advanced Material Laboratory, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China.
Nanoscale. 2018 May 31;10(21):10250-10255. doi: 10.1039/c8nr00769a.
In this work, we report a simple but novel method to transfer highly luminescent silicon nanoparticles (Si NPs) from solutions to solids without sacrificing their excellent photoluminescence (PL) properties. Hybrid Si NP/clay phosphors that glowed ultrabright and had colorful PL properties were first obtained. More importantly, large-area and flexible films with superior PL properties can be easily obtained via combining the Si NP/clay hybrids with different kinds of polymer. The Si NP-based phosphors and films from our method show high stabilities with no significant loss of PL performance after long-term storage (several months). In addition, bright yellow-emitting Si NPs were prepared and used as down-converters for white-light-emitting diodes (W-LEDs). Overall, this work presents a simple, versatile and green method to fabricate Si NP-based solid hybrids with superior PL properties, which has promise to be applied in the future in solid-state lighting fields.
在这项工作中，我们报告了一种简单但新颖的方法，可以将高亮度的硅纳米粒子（Si NPs）从溶液转移到固体而不牺牲其优异的光致发光（PL）性能。首先获得了发超强亮度且具有多彩 PL 性能的杂化 Si NP/粘土荧光粉。更重要的是，通过将 Si NP/粘土杂化物与不同种类的聚合物相结合，可以很容易地获得具有优异 PL 性能的大面积和柔性薄膜。我们的方法制备的基于 Si NP 的荧光粉和薄膜具有很高的稳定性，经过长时间（几个月）的储存后，PL 性能没有明显下降。此外，还制备了发明亮黄色光的 Si NPs，并将其用作白光发光二极管（W-LED）的下转换材料。总的来说，这项工作提出了一种简单、通用和绿色的方法来制备具有优异 PL 性能的基于 Si NP 的固态杂化材料，有望在未来的固态照明领域得到应用。
