网格固定稳定了溶液处理的半导体
Mengxia Liu1, Yuelang Chen2, Chih-Shan Tan1
1Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
Nature
|May 24, 2019
概括
研究人员开发了结合矿和体量子点 (CQD) 的新型混合材料,以提高半导体稳定性. 这种格子固方法提高了光电子应用的材料耐用性.
科学领域:
- 材料科学
- 纳米技术
- 半导体物理
背景情况:
- 解决方案加工的半导体需要更好的稳定性,以便广泛使用.
- 无机化 Perowskites 提供合适的带隙,但经历不良的相位过渡.
- 体量子点 (CQD) 提供可调节的带隙,但由于聚合和氧化而面临稳定性问题.
研究的目的:
- 通过将合化 PeroVskites 与化 CQD 结合起来,制造"网格固"混合材料.
- 提高这些混合材料的稳定性和性能.
- 调查矿和CQD之间的格子匹配对材料特性的影响.
主要方法:
- 混合材料的制造,其中包括化物矿和甲基CQD.
- 在环境和高温下材料稳定性的表征.
- 对光发光的量子效率和电荷载体的移动性进行评估.
主要成果:
- 矿和CQD之间的格子匹配抑制了不必要的矿相变.
- 混合材料具有增强的空气稳定性 (数量级改进) 和热稳定性 (在200°C下稳定数小时).
- 矿基层可以防止CQD氧化,减少纳米颗粒聚合,同时提高电荷载体的移动性.
结论:
- 与单个组件相比,带有格子的混合材料提供了更高的稳定性和性能.
- 这些新材料在解决方案处理光电子设备的发展方面具有显著的潜力.
- 对于下一代半导体技术来说,矿和CQD的协同作用是一个有前途的战略.
相关概念视频
Lattice Centering and Coordination Number
11.4K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
11.4K
The Anchoring-and-Adjustment Heuristic
7.7K
In order to make good decisions, we use our knowledge and our reasoning. Often, this knowledge and reasoning is sound and solid. However, sometimes, we are swayed by biases or by others manipulating a situation. For example, let’s say you and three friends wanted to rent a house and had a combined target budget of $1,600. The realtor shows you only very run-down houses for $1,600 and then shows you a very nice house for $2,000. Might you ask each person to pay more in rent to get the...
7.7K
Aqueous Solutions and Heats of Hydration
17.7K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
17.7K
Trends in Lattice Energy: Ion Size and Charge
26.6K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.6K
Semiconductors
1.4K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.4K
Bewley Lattice Diagram
1.5K
The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
1.5K


