In this work, bismuth oxide nanoparticles were successfully deposited on porous silicon (PSi) in order to enhance the light absorption and reduce the optical losses. The obtained bismuth oxide (Bi2O3)/PSi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\hbox {Bi}_{2}\hbox {O}_{3})/\hbox {PSi}$$\end{document} samples were characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM) combined with energy-dispersive spectroscopy (EDS), atomic force microscopy (AFM), photoluminescence (PL), UV–visible absorption and reflection spectroscopy techniques. The XRD studies revealed the formation of the monoclinic α-Bi2O3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\upalpha \hbox {-Bi}_{2}\hbox {O}_{3}$$\end{document} phase. The XPS analysis demonstrates the formation of highly pure Bi2O3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Bi}_{2}\hbox {O}_{3}$$\end{document} nanoparticles in accordance with XRD results. The SEM and AFM analyses confirmed that the bismuth oxide nanoparticles are well incorporated and uniformly distributed over the surface of PSi without changes in the arrangement and shape of the pores, resulting in an optimized microstructure. The Bi2O3/PSi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Bi}_{2}\hbox {O}_{3}/\hbox {PSi}$$\end{document} films showed better absorption than PSi layers as indicated by UV–Vis absorption technique. The reflection measurements confirmed a further reduction in reflectivity of PSi from 6.4 to 3.5% after the inclusion of Bi2O3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Bi}_{2}\hbox {O}_{3}$$\end{document} nanoparticles, which is of significant importance for solar cells application since it can enhance its conversion efficiency. The Bi2O3/PSi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Bi}_{2}\hbox {O}_{3}/\hbox {PSi}$$\end{document} films have a great promise to be used as efficient antireflection coatings in innovative concepts of higher efficiency and cost-effective solar cells.

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氧化铋纳米颗粒对多孔硅薄膜理化性能的影响

在这项工作中，氧化铋纳米粒子成功地沉积在多孔硅 (PSi) 上，以增强光吸收并减少光损失。得到的氧化铋 (Bi2O3)/PSi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{ upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\hbox {Bi}_{2}\hbox {O}_{3})/\hbox {PSi}$$\end{文档}样品通过 X 射线衍射 (XRD)、X 射线光电子能谱 (XPS)、拉曼光谱、扫描电子显微镜 (SEM) 结合能量色散光谱 (EDS)、原子力显微镜 (AFM) 进行表征、光致发光 (PL)、紫外-可见吸收和反射光谱技术。XRD 研究揭示了单斜晶 α-Bi2O3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} 的形成\usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\upalpha \hbox {-Bi}_{2}\hbox {O}_{3}$$\end{document}阶段。XPS 分析证明了高纯度 Bi2O3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage 的形成{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Bi}_{2}\hbox {O}_{3}$$\end{document} 纳米粒子根据 XRD结果。SEM 和 AFM 分析证实，氧化铋纳米颗粒很好地结合并均匀分布在 PSi 的表面上，而没有改变孔的排列和形状，从而优化了微观结构。Bi2O3/PSi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{ \oddsidemargin}{-69pt} \begin{document}$$\hbox {Bi}_{2}\hbox {O}_{3}/\hbox {PSi}$$\end{document} 薄膜比紫外-可见吸收技术表明的PSi层。反射测量证实，PSi 的反射率从 6.4 进一步降低到 3。