量子点
光致发光
红外线的
二极管
光电子学
俄歇效应
材料科学
量子产额
发光二极管
制作
磷光
吸收(声学)
纳米技术
螺旋钻
光学
荧光
物理
复合材料
病理
原子物理学
替代医学
医学
作者
Zhenyang Liu,Chaoqi Hao,Yingying Sun,Junyu Wang,Lacie Dube,Mingjun Chen,Wei Dang,Jian Hu,Xu Li,Ou Chen
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-04-17
标识
DOI:10.1021/acs.nanolett.4c01249
摘要
CuInS2 (CIS) quantum dots (QDs) represent an important class of colloidal materials with broad application potential, owing to their low toxicity and unique optical properties. Although coating with a ZnS shell has been identified as a crucial method to enhance optical performance, the occurrence of cation exchange has historically resulted in the unintended formation of Cu–In–Zn–S alloyed QDs, causing detrimental blueshifts in both absorption and photoluminescence (PL) spectral profiles. In this study, we present a facile one-pot synthetic strategy aimed at impeding the cation exchange process and promoting ZnS shell growth on CIS core QDs. The suppression of both electron–phonon interaction and Auger recombination by the rigid ZnS shell results in CIS/ZnS core/shell QDs that exhibit a wide near-infrared (NIR) emission coverage and a remarkable PL quantum yield of 92.1%. This effect boosts the fabrication of high-performance, QD-based NIR light-emitting diodes with the best stability of such materials so far.
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