照片诱导的长距离电荷转移在:堆叠问题
Guoying Yao1,2, Ekadashi Pradhan2, Zhenyu Yang1
1MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, IGCME, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China.
研究人员使用新的轨道概念探索堆叠的 (SiH) 中的电荷转移. 某些堆叠显示有效的电荷传输,提供了一种调整二维材料光电子特性的方式.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 层间电荷转移激子对于范德瓦尔斯堆叠的二维材料至关重要.
- 了解固体中的兴奋状态是设计新材料的关键.
研究的目的:
- 研究不同堆叠的 (SiH) 中的光诱导电荷转移.
- 开发一种方法来描述固体中的兴奋状态和结合.
- 探索二维的堆叠依赖的光电子特性.
主要方法:
- 开发了区域自然洞和联粒子轨道的概念.
- 在SiH中分析了激发状态和间层轨道重叠.
- 在紫外线和近紫外线辐射下模拟电荷转移,用于不同的SiH堆叠.
主要成果:
- 在1H和6R堆叠中的 (SiH) 呈现出显著的间层电荷转移 (∼10 Å).
- 电荷转移与传导带最小的层间轨道重叠有关.
- 3R堆叠不利于这种层间轨道重叠和电荷转移.
结论:
- 区域自然轨道概念为激发状态提供了结合的见解.
- 在SiH中堆叠工程为光电子属性提供了一个可调节的路线.
- 这种方法适用于其他14组二维材料.
更多相关视频
08:48Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
Published on: November 9, 2015
08:45Integration of Light Trapping Silver Nanostructures in Hydrogenated Microcrystalline Silicon Solar Cells by Transfer Printing
Published on: November 9, 2015
相关概念视频
Trends in Lattice Energy: Ion Size and Charge
Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
¹H NMR: Long-Range Coupling
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
The Electrical Double Layer
