胶体CdS/CdSe/CdS量子阱纳米结构中的激子动力学过程

Exciton Dynamic Processes in Colloidal CdS/CdSe/CdS Quantum Well Nanostructures.

作者信息

Xiong Ruixiang, Li Yibo, Yang Chaoyi, Jiang Shumin, Yang Binhao, Wang Yinghui, Ning Jiajia

机构信息

Key Laboratory of Physics and Technology for Advanced Batteries, Ministry of Education, College of Physics, Jilin University, Changchun 130012, China.

State Key Laboratory of Superhard Materials, Synergetic Extreme Condition High-Pressure Science Center, College of Physics, Jilin University, Changchun 130012, China.

出版信息

J Phys Chem Lett. 2025 Jun 12;16(23):5644-5649. doi: 10.1021/acs.jpclett.5c01150. Epub 2025 May 29.

DOI:10.1021/acs.jpclett.5c01150

PMID:40442023

Abstract

Colloidal quantum well nanostructures (QWs) are potential materials for optoelectronic devices, such as light-emitting diodes and lasers. CdS/CdSe/CdS and CdS/CdSe/ZnS QWs were produced within a colloidal method, on which characterizations were conducted. The transient absorption spectra showed different dynamic processes between the traditional core/shell quantum dots and QWs, as well as between CdS/CdSe/CdS and CdS/CdSe/ZnS QWs. Models were built on the basis of Marcus theory and quantum confinement effect to explain the result of the experiment.

摘要

胶体量子阱纳米结构（QWs）是用于光电器件（如发光二极管和激光器）的潜在材料。通过胶体法制备了CdS/CdSe/CdS和CdS/CdSe/ZnS量子阱，并对其进行了表征。瞬态吸收光谱表明，传统的核/壳量子点与量子阱之间，以及CdS/CdSe/CdS和CdS/CdSe/ZnS量子阱之间存在不同的动力学过程。基于马库斯理论和量子限制效应建立了模型，以解释实验结果。