期刊
INORGANIC CHEMISTRY
卷 54, 期 21, 页码 10184-10191出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.5b01237
关键词
-
资金
- State of Sao Paulo Research Foundation (FAPESP) [CEPID 2013/07296-2]
- Coordination for the Improvement of Higher Education Personnel (Capes)
- Spanish MALTA-Consolider Ingenio 2010 Program [CSD2007-00045]
Materials with high photoluminescence (PL) intensity can potentially be used in optical and electronic devices. Although the PL properties of bismuth(III) oxide with a monoclinic crystal structure (alpha-Bi2O3) have been explored in the past few years, methods of increasing PL emission intensity and information relating PL emission to structural defects are scarce. This research evaluated the effect of a pressure-assisted heat treatment (PAHT) on the PL properties of alpha-Bi2O3 with a needlelike morphology, which was synthesized via a microwave-assisted hydrothermal (MAH) method. PAHT caused an angular increase between the [BiO6][BiO6] clusters of alpha-Bi2O3, resulting in a significant increase in the PL emission intensity. The Raman and XPS spectra also showed that the alpha-Bi2O3 PL emissions in the low-energy region (below similar to 2.1 eV) are attributed to oxygen vacancies that form defect donor states. The experimental results are in good agreement with first-principles total-energy calculations that were carried out within periodic density functional theory (DFT).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据