Photoconductive detection of vibronic states at semiconductor interfaces and thin films

半导体界面和薄膜电子振动态的光电导检测

• 批准号: 277005943
• 负责人: Privatdozent Dr. Eduard Lavrov
• 金额: --
• 依托单位: Professur für Halbleiterphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/277005943?language=en
• 关键词: Photoconductive; detection; vibronic; states; semiconductor

Local vibrational mode (LVM) spectroscopy is a tool that supplies a wealth of information about the microscopic structure of impurities and defects embedded in host semiconductors. At present, IR absorption is an experimental technique of choice providing important insight into vibrational states of defect complexes. Unfortunately, its use is severely restricted to those impurities whose vibrational frequencies are decoupled from other elementary excitations in solids. Another drawback of the IR absorption is a relatively low sensitivity, which hinders its application on thin films and semiconductor interfaces. In this project we will develop photoconductive approach to investigate vibrational motion of impurities and defects in semiconductors which occur in the highly absorbing spectral regions inaccessible for IR absorption and/or positioned at semiconductor interfaces and thin films. This technique will be applied to probe LVMs of those defects which were predicted by theory or are suggested by experiment but where the chemical composition, microscopic structure, and/or electrical activity remain unknown.

局域振动模式(LVM)光谱是一种提供关于嵌入在主体半导体中的杂质和缺陷的微观结构的丰富信息的工具。目前，红外吸收是研究缺陷络合物振动状态的一种重要实验手段。不幸的是，它的应用严重局限于那些振动频率与固体中其他基本激发相分离的杂质。红外吸收的另一个缺点是相对较低的灵敏度，这阻碍了它在薄膜和半导体界面上的应用。在这个项目中，我们将开发光导方法来研究半导体中的杂质和缺陷的振动运动，这些杂质和缺陷出现在红外吸收不到的高吸收光谱区域和/或位于半导体界面和薄膜上。这项技术将被应用于探测那些理论预测或实验建议但化学成分、微观结构和/或电活动未知的缺陷。

项目成果

Photoconductivity as a method to probe defects in ultra thin Si films

光电导作为探测超薄硅薄膜缺陷的方法

• DOI: 10.1063/1.4979276
• 发表时间: 2017
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: E. V. Lavrov;I. Chaplygin;T. Mchedlidze
• 通讯作者: T. Mchedlidze

Hydrogen donor in anatase TiO 2

锐钛矿型 TiO 2 中的氢供体

• DOI: 10.1103/physrevb.93.045204
• 发表时间: 2016
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: E. V. Lavrov

Hydrogen donors in ZnO and TiO2

ZnO 和 TiO2 中的氢供体

• DOI: 10.1117/12.2245420
• 发表时间: 2017
• 作者: E. V. Lavrov

Photoconductive detection of hydrogen in ZnO and rutile TiO2

ZnO 和金红石 TiO2 中氢的光电导检测

• DOI: 10.1063/1.4960132
• 发表时间: 2016
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: E. V. Lavrov;T. Mchedlidze;F. Herklotz
• 通讯作者: F. Herklotz

On the method of photoconductive detection of defects in semiconductors by vibrational mode-related Fano resonances

振动模式相关法诺共振光电导检测半导体缺陷的方法

• DOI: 10.1063/1.5037412
• 发表时间: 2018
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: F. Herklotz;I. Chaplygin;E. V. Lavrov
• 通讯作者: E. V. Lavrov