PDF(Pubmed)
Abstract：
With a rising interest in smart windows and optical displays, the utilization of metal oxides (MOs) has garnered significant attention owing to their high active sites, flexibility, and tunable electronic and optical properties. Despite these advantages, achieving precise tuning of optical properties in MOs-based quantum dots and their mass production remains a challenge. In this study, we present an easily scalable approach to generate WO3 quantum dots with diverse sizes through sequential insertion/exfoliation processes in solvents with suitable surface tension. Additionally, we utilized the prepared WO3 quantum dots in the fabrication of luminescent transparent wood via an impregnation process. These quantum dots manifested three distinct emitting colors: red, green, and blue. Through characterizations of the structural and optical properties of the WO3 quantum dots, we verified that quantum dots with sizes around 30 nm, 50 nm, and 70 nm showcase a monoclinic crystal structure with oxygen-related defect sites. Notably, as the size of the WO3 quantum dots decreased, the maximum emitting peak underwent a blue shift, with peaks observed at 407 nm (blue), 493 nm (green), and 676 nm (red) under excitation by a He-Cd laser (310 nm), respectively. Transparent woods infused with various WO3 quantum dots exhibited luminescence in blue/white emitting colors. These results suggest substantial potential in diverse applications, such as building materials and optoelectronics.
摘要：
随着人们对智能窗户和光学显示器的兴趣与日俱增，金属氧化物（MOs）的利用由于其高活性位点而引起了极大的关注，灵活性,和可调的电子和光学性质。尽管有这些优势,在基于MOs的量子点及其批量生产中实现光学特性的精确调谐仍然是一个挑战。在这项研究中,我们提出了一种易于扩展的方法，通过在具有合适表面张力的溶剂中的顺序插入/剥离过程来生成具有不同尺寸的WO3量子点。此外,我们利用制备的WO3量子点通过浸渍工艺制造发光透明木材。这些量子点表现出三种不同的发光颜色：红色，绿色,和蓝色。通过表征WO3量子点的结构和光学性质，我们验证了30纳米大小的量子点，50nm,和70nm展示了具有氧相关缺陷位点的单斜晶体结构。值得注意的是,随着WO3量子点尺寸的减小，最大发射峰经历了蓝移，在407nm处观察到峰（蓝色），493nm（绿色），和676nm（红色）在He-Cd激光（310nm）的激发下，分别。注入各种WO3量子点的透明木材表现出蓝色/白色发光颜色的发光。这些结果表明，在不同的应用中具有巨大的潜力，如建筑材料和光电。
