Ji Ruonan, Hu Xiaoyun, Zhang Qian, Fan Jun, Zhang Dekai, Zhang Liang, Fan Haibo, Wang Yue, Zhan Suchang
J Nanosci Nanotechnol. 2014 May;14(5):3366-72. doi: 10.1166/jnn.2014.8024.
In this paper, with spherical SiO2 particles fabricated via Stöber method, monodispersed and uniform SiO2 @Y2O3:Eu3+ core-shell submicrospheres were prepared through a simply homogeneous precipitation method. SEM, TEM and XRD analysis indicated that the as-prepared samples were uniform and well monodispersed spheres. The SiO2 core was perfectly coated by the shell composed of cubic crystalline Y2O3:Eu3+ and the thickness of the shell was about 26 nm. Photoluminescence spectra showed that the luminescence efficiency was improved remarkably after being coated on the SiO2 core. The 3D PL spectra showed that almost all UV photons in the range from 200 nm to 400 nm can be converted to visible photons by the as-prepared samples. Results showed that when the SiO2 core was synthesized in the TEOS single feeding model with the amount of core being 0.4 g, doping concentration being 4% and annealing at 800 degrees C, the sample has the best performance on luminescence. By dispersing the as-prepared sample in the anti-reflection sol to prepared the wavelength conversion and anti-reflection film and apply it to the silicon solar cell, the photoelectric conversion efficiency can be increased by 7.41% in maximum.
本文采用Stöber法制备球形SiO₂颗粒，通过简单的均匀沉淀法制备了单分散且均匀的SiO₂@Y₂O₃:Eu³⁺核壳亚微球。扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线衍射（XRD）分析表明，所制备的样品为均匀且单分散良好的球体。SiO₂核被由立方晶型Y₂O₃:Eu³⁺组成的壳完美包覆，壳的厚度约为26nm。光致发光光谱表明，包覆在SiO₂核上后发光效率显著提高。三维PL光谱表明，所制备的样品能将200nm至400nm范围内几乎所有的紫外光子转换为可见光子。结果表明，当SiO₂核采用TEOS单次进料模式合成，核的量为0.4g，掺杂浓度为4%且在800℃退火时，样品的发光性能最佳。通过将所制备的样品分散在抗反射溶胶中制备波长转换和抗反射膜并将其应用于硅太阳能电池，光电转换效率最高可提高7.41%。
