被指控的有罪:低协调的在充电电子的酸量子点中的作用
Maarten Stam1, Indy du Fossé1, Ivan Infante2,3
1Optoelectronic Materials Section, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands.
ACS nano
|September 15, 2023
概括
化物 (InP) 量子点 (QD) 的电子充电可以产生陷状态,特别是如果原子的协调不足. 核心外结构可以防止这种情况,为光电子应用程序提供稳定的电子充电.
科学领域:
- 材料科学 材料科学 材料科学
- 量子化学 是一个量子化学.
- 纳米技术 纳米技术
背景情况:
- 量子点 (QD) 提供独特的尺寸依赖的光学特性和高光发光量子产量 (PLQY).
- 化 (InP) QDs因其较低的毒性而受到消费者应用的青.
- 光电子应用需要用电子和孔稳定地充电QD,但对效应的了解很少.
研究的目的:
- 提供对InP和InP/ZnSe量子点的电子电荷的理论见解.
- 了解电子充电对基于InP的QDs的组成和特性的影响.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 分析了InP核心和InP/ZnSe核心外量子点的理论模型.
主要成果:
- 电子充电InP QDs与低协调的In原子导致陷状态的形成.
- 低协调的In原子,通常在InP核心QD表面发现,在电子充电时引起陷状态.
- 具有完全协调的In原子的InP/ZnSe核心外QD可以在不形成陷状态的情况下被充电.
结论:
- 低协调的In原子的存在不利于基于InP的QDs的稳定电子充电.
- 设计具有完全协调的In原子的InP/ZnSe核心外结构可以实现稳定的电子充电.
- 避免低协调的原子对于开发强大的基于 QD 的光电子设备至关重要.
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