Sol–gel method was utilized for synthesis of transparent bulk-samples of undoped, Mn-doped and Dy-Mn-codoped zinc silicate (Zn₂SiO₄). The products were characterized in two forms which are the xerogels and after heat treatment at 750 °C for 3 h. Formation of nano-crystalline willemite in the three compositions was confirmed by X-ray diffraction (XRD). In case of 2 mol% Mn-doping, XRD revealed formation of nano-pyroxmangite, i.e. manganese silicate (MnSiO₃). Microstructure of the nanocrystalline products was characterized by high resolution transmission electron microscopy (HRTEM). XRD and HRTEM indicated that the size of formed nano-crystals varied from 15 to 40 nm. Photoluminescence (PL) spectroscopy revealed tunable blue and bright green emissions from the pure nano-willemite upon ultraviolet excitation at 254, 300, 350 and 365 nm. CIE chromaticity diagrams provided definitely the overall color of light emitted from each spectrum. These emissions are attributed to optically active luminescent defects of various types. Mn and Dy play no crucial role in the luminescence behavior, but only slightly alter the nano-willemite structure causing different luminescent defects that, in turn, produces the difference in light tunes. The obtained results lead to the assumption that 1 mol% of Dy₂O₃ was entirely masked within the nanowillemite lattice which is evidenced by absolute absence of any peak belonging to Dy${}^{3+}$ ions in the ultraviolet–visible–near infrared optical absorption spectra. The present willemites can find potential application as blue and green phosphors in luminescent optical and optoelectronic devices.

溶胶-凝胶法用于合成未掺杂，Mn掺杂和Dy-Mn掺杂的硅酸锌（Zn ₂ SiO ₄）的透明块状样品。产物以两种形式表征，即干凝胶和在750°C热处理3小时后。通过X射线衍射（XRD）证实了三种组合物中纳米晶硅铝石的形成。在锰掺杂量为2 mol％的情况下，X射线衍射表明形成了纳米锰铁矿，即硅酸锰（MnSiO ₃）。纳米晶体产物的微观结构通过高分辨率透射电子显微镜（HRTEM）表征。XRD和HRTEM表明形成的纳米晶体的尺寸在15至40nm之间变化。光致发光（PL）光谱显示，在254、300、350和365 nm处进行紫外线激发后，纯纳米硅铝石会产生可调谐的蓝色和亮绿色发射。CIE色度图绝对提供了每个光谱发出的光的整体颜色。这些发射归因于各种类型的光学活性发光缺陷。Mn和Dy在发光行为中没有关键作用，而仅轻微改变纳米硅钙石结构，从而引起不同的发光缺陷，进而导致光调谐的差异。获得的结果导致假定Dy为1mol％。₂ O ₃被完全覆盖在纳米硅钙石晶格中，这可以通过绝对不存在任何属于Dy的峰来证明。${}^{3+}$紫外-可见-近红外光吸收光谱中的离子 本发明的硅藻土可以在发光光学和光电器件中作为蓝色和绿色磷光体找到潜在的应用。