Controlling Thickness of ZnSe Intermediate Shell Narrows FWHM of Green-Emitting Spectra of InP/ZnSe/ZnS Multi-Shell Quantum Dots

被引：6
作者：
Okamoto, Akihito [1 ]
Bai, Haruki [1 ]
Toda, Shintaro [1 ,2 ]
Huang, Maowei [1 ]
Kajii, Hirotake [1 ]
Kawai, Kentaro [1 ,2 ]
Murakami, Hirohiko [1 ,2 ]
机构：
[1] Osaka Univ, Grad Sch Engn, 2-1,Yamada Oka, Osaka 5650871, Japan
[2] ULVAC Inc, Osaka Univ Joint Res Lab Future Technol, ULVAC, 2-1,Yamada Oka, Osaka 5650871, Japan
来源：
CHEMNANOMAT | 2023年 / 9卷 / 05期
关键词：
Quantum dots; Nanoparticle; Fluorescence; Crystal growth; Surface chemistry; INP; NANOCRYSTALS; CORE; BRIGHT; BLUE; CHEMISTRY; EFFICIENT; EMISSION; GROWTH;
D O I：
10.1002/cnma.202200534
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Multi-shell InP/ZnSe/ZnS quantum dots (QDs) are expected to be applied to next-generation displays. While the effect of the thickness of the ZnSe intermediate shell on the properties of InP/ZnSe/ZnS QDs has been reported for red-emission, there are few reports on green-emitting ones. Here we show the effects of ZnSe thickness on full width at half maximum (FWHM) and photoluminescence quantum yield (PLQY) of the emission spectra of green-emitting InP/ZnSe/ZnS QDs. The results revealed that the ZnSe intermediate shell of green-emitting InP/ZnSe/ZnS QDs has an optimum thickness (1.2 nm in this study). Excessive or insufficient ZnSe intermediate shell broadened FWHM and decreased PLQY. This means that difference in the thickness of the ZnSe intermediate shell changes the band structure and the electron behavior. The ZnSe thickness is one of the dominant factors that determine the optical properties in green-emitting InP/ZnSe/ZnS QDs.
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页数：6
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