化物排序使得3D中高级电荷传输成为可能 (NMPDA) Pb2 I4 Br2 基体单晶晶体
Biqi He1, Kuan Kuang1, Guoliang Tong1
1Ministry-of-Education Key Laboratory of Green Preparation and Application for Functional Materials, and School of Materials Science & Engineering, Hubei University, Wuhan, 430062, China.
Small (Weinheim an der Bergstrasse, Germany)
|October 11, 2023
概括
在3D中混合 (NMPDA) Pb2 I6 基化物产生有序化物结构. 这增强了稳定性和电荷传输,从而在混合化物矿中提高了光探测器的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 光电学是指光电子产品.
背景情况:
- 化物组合工程是调整3D矿光学和电子性能的关键.
- 化物混合对3D化物结构和电荷传输特性的影响尚不清楚.
研究的目的:
- 为了研究 (Br) 混合对3D (NMPDA) Pb2 I6基体的结构,电子和光电子特性的影响.
- 探索混合化物3D化物对先进光电子设备的潜力.
主要方法:
- 混合化物基化物 (NMPDA) 的合成Pb2 I4 Br2.2.
- 结构特征以确定化物排序.
- 测量电气性能以评估电费运输.
- 密度函数理论 (DFT) 计算用于理论见解.
- 单晶光探测器的制造和测试.
主要成果:
- 稳定 (NMPDA) Pb2 I4 Br2与边缘共享站点有序的离子进行了合成.
- 这种有序结构表现出更强的H键,更短的层间距离和更少的八面体扭曲.
- 增强的特性包括高离子迁移激活能量,低缺陷密度和改善载体移动性-寿命产物 (μτ).
- 光探测器表现出高的开/关比 (3.92 × 10^3),光反应率 (0.28 A W^-1) 和检测能力 (3.05 × 10^12 斯).
结论:
- 合并到3D (NMPDA) Pb2 I6 基体中导致稳定,有序的化物结构.
- 这种结构顺序显著提高了电荷传输特性和设备性能.
- 混合化物3D化物是开发稳定和高性能光电子设备的有希望的材料.
更多相关视频
04:14Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
Published on: October 1, 2019
13.0K
08:12Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
9.6K
相关概念视频
02:42Ionic Crystal Structures
14.4K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
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...
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...
14.4K
02:37Metallic Solids
18.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.7K
Tetrahedral 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,...
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,...
42.7K
02:42Valence Bond Theory
8.6K
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...
8.6K
02:45Alkyl Halides
16.7K
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
16.7K
04:01VSEPR Theory and the Effect of Lone Pairs
42.4K
Effect of Lone Pairs of Electrons on Molecule Geometry
42.4K