量子点
量子产额
光致发光
电致发光
光电子学
卤化物
配体(生物化学)
材料科学
纳米技术
光化学
荧光
化学
无机化学
光学
物理
受体
生物化学
图层(电子)
作者
Seongwoo Cho,Sung Nam Lim,Hye Seon Kim,Shin Ae Song,Ki‐Young Kim,Kuk Young Cho,Ju Yeon Woo
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-11-22
卷期号:5 (12): 18905-18911
被引量:5
标识
DOI:10.1021/acsanm.2c04677
摘要
We have developed a nontoxic method of synthesizing blue-emitting ZnSeTe/ZnSe/ZnS quantum dots (QDs), which can be employed to realize QD-based electroluminescent displays. By introducing excessive metal halides without highly toxic hydrofluoric acid, we achieved a very high photoluminescence quantum yield reaching 94%. Furthermore, for the first time, air-stable ZnSeTe/ZnSe/ZnS QDs were demonstrated by employing simple surface ligand exchange performed both in solution and solid states. Various spectroscopic studies revealed that initial carboxylate ligands could be very effectively replaced by our simple ligand exchange at room temperature. In addition, we significantly broadened the spectral range of QDs by increasing the Te ratio of the core; therefore, green- and red-emitting ZnSeTe/ZnSe/ZnS QDs were demonstrated. The air-stable Zn-based QDs with full color emission developed in our study can be used as superior emitters in displays.
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