二维紫色P11:一个大带间隙合物
Gary Cicirello1, Mengjing Wang2,3, Quynh P Sam3
1Department of Chemistry and Biochemistry, Wichita State University, Wichita, Kansas 67260, United States.
Journal of the American Chemical Society
|March 30, 2023
概括
合成了一种新的二维 (2D) 紫色异质P11. 这种材料具有很大的带隙和高载体流动性,使其成为下一代电子和光电子的前景.
科学领域:
- 材料科学
- 凝聚物质物理学
- 纳米技术
背景情况:
- 具有大带间隙,良好的稳定性和高载体移动性的新型二维 (2D) 材料对于电子和光电子的进步至关重要.
- 现有的二维材料在下一代应用中面临稳定性或电子性能的限制.
研究的目的:
- 合成和表征一种新的二维紫色,P11.
- 研究紫P11的结构性,电子性和稳定性,用于潜在的光电子应用.
主要方法:
- 使用盐流法与水合成紫色P11.
- 通过单晶X射线衍射来确定晶体结构.
- 使用光发光,拉曼光谱,UV-Vis和电子能量损失光谱的电子和光学特性.
- 使用密度函数理论 (DFT) 的理论计算.
主要成果:
- 已经成功合成和描述了毫米大小的紫色P11晶体.
- 紫P11结晶在单临床空间组C2/c中,具有特定的单元细胞参数.
- 剥落的紫色P11片具有厚度依赖的特性和适度的环境稳定性 (长达1小时).
- 大量紫色P11在周围空气中长时间保持出色的稳定性.
- 测量了2.0(1) eV的大光带间隙,与DFT对该直带间隙半导体的1.8 eV (批量) 和1.9 eV (单层) 的预测一致.
- 预计紫色P11具有较高的载体流动性.
结论:
- 紫P11是一种具有较大的带间隙的新型二维材料,超越已知的单元二维层结晶.
- 其卓越的稳定性和预测的高载体流动性使其成为先进电子和光电子设备的非常有吸引力的候选者.
- 紫色P11的合成和表征为二维纳米技术中的材料发现开辟了新的途径.
相关概念视频
Predicting Molecular Geometry
34.6K
VSEPR Theory for Determination of Electron Pair Geometries
34.6K
Hybridization of Atomic Orbitals II
32.7K
sp3d and sp3d 2 Hybridization
32.7K
Valence Bond Theory
8.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.9K
Exceptions to the Octet Rule
28.7K
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
28.7K
The Aufbau Principle and Hund's Rule
53.6K
To determine the electron configuration for any particular atom, we can build the structures in the order of atomic numbers. Beginning with hydrogen, and continuing across the periods of the periodic table, we add one proton at a time to the nucleus and one electron to the proper subshell until we have described the electron configurations of all the elements. This procedure is called the aufbau principle, from the German word aufbau (“to build up”). Each added electron occupies the...
53.6K
Energy Bands in Solids
978
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
978


