Stokes-shift engineered CdSe/CdS/Cd1-xZnxSe1-ySy nanoplatelets with tunable emission wavelength

Seungin Jee; Jaehan Jung

doi:10.1016/j.tsf.2022.139203

Stokes-shift engineered CdSe/CdS/Cd_1-xZn_xSe_1-yS_y nanoplatelets with tunable emission wavelength

Seungin Jee, Jaehan Jung

Dept. of Materials Science & Engineering

Hongik University

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A facile synthetic route to preparing CdSe/CdS/Cd_1-xZn_xSe_1-yS_y core/shell/shell nanoplatelets (NPLs) was introduced via a sequential passivation of plain CdSe NPLs with CdS and Cd_1-xZn_xSe_1-yS_y shell. The CdS/Cd_1-xZn_xSe_1-yS_y shell was passivated by 1-dodecanethiol and cadmium oleate and zinc oleate precursors by capitalizing on their chemical reactivity difference. Red-shift of the absorption and emission positions of prepared CdSe/CdS/Cd_1-xZn_xSe_1-yS_y NPLs was observed due to the delocalization of electron in the shell. Resulting core/shell NPLs exhibited large Stokes’ shift which can possibly reduce re-absorption. Core/shell/shell NPLs exhibited excellent photo-stability compared to plain CdSe NPLs. Photoluminescence decays of resulting core/shell NPLs was studied. The shape and size of NPLs was characterized using high-resolution transmission electron microscope.

Original language	English
Article number	139203
Journal	Thin Solid Films
Volume	750
DOIs	https://doi.org/10.1016/j.tsf.2022.139203
State	Published - 31 May 2022

Keywords

Core/shell platelet
II-VI semiconductor
Photoluminescence decay
Surface passivation

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title = "Stokes-shift engineered CdSe/CdS/Cd1-xZnxSe1-ySy nanoplatelets with tunable emission wavelength",

abstract = "A facile synthetic route to preparing CdSe/CdS/Cd1-xZnxSe1-ySy core/shell/shell nanoplatelets (NPLs) was introduced via a sequential passivation of plain CdSe NPLs with CdS and Cd1-xZnxSe1-ySy shell. The CdS/Cd1-xZnxSe1-ySy shell was passivated by 1-dodecanethiol and cadmium oleate and zinc oleate precursors by capitalizing on their chemical reactivity difference. Red-shift of the absorption and emission positions of prepared CdSe/CdS/Cd1-xZnxSe1-ySy NPLs was observed due to the delocalization of electron in the shell. Resulting core/shell NPLs exhibited large Stokes{\textquoteright} shift which can possibly reduce re-absorption. Core/shell/shell NPLs exhibited excellent photo-stability compared to plain CdSe NPLs. Photoluminescence decays of resulting core/shell NPLs was studied. The shape and size of NPLs was characterized using high-resolution transmission electron microscope.",

keywords = "Core/shell platelet, II-VI semiconductor, Photoluminescence decay, Surface passivation",

author = "Seungin Jee and Jaehan Jung",

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year = "2022",

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doi = "10.1016/j.tsf.2022.139203",

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AU - Jee, Seungin

AU - Jung, Jaehan

PY - 2022/5/31

Y1 - 2022/5/31

N2 - A facile synthetic route to preparing CdSe/CdS/Cd1-xZnxSe1-ySy core/shell/shell nanoplatelets (NPLs) was introduced via a sequential passivation of plain CdSe NPLs with CdS and Cd1-xZnxSe1-ySy shell. The CdS/Cd1-xZnxSe1-ySy shell was passivated by 1-dodecanethiol and cadmium oleate and zinc oleate precursors by capitalizing on their chemical reactivity difference. Red-shift of the absorption and emission positions of prepared CdSe/CdS/Cd1-xZnxSe1-ySy NPLs was observed due to the delocalization of electron in the shell. Resulting core/shell NPLs exhibited large Stokes’ shift which can possibly reduce re-absorption. Core/shell/shell NPLs exhibited excellent photo-stability compared to plain CdSe NPLs. Photoluminescence decays of resulting core/shell NPLs was studied. The shape and size of NPLs was characterized using high-resolution transmission electron microscope.

AB - A facile synthetic route to preparing CdSe/CdS/Cd1-xZnxSe1-ySy core/shell/shell nanoplatelets (NPLs) was introduced via a sequential passivation of plain CdSe NPLs with CdS and Cd1-xZnxSe1-ySy shell. The CdS/Cd1-xZnxSe1-ySy shell was passivated by 1-dodecanethiol and cadmium oleate and zinc oleate precursors by capitalizing on their chemical reactivity difference. Red-shift of the absorption and emission positions of prepared CdSe/CdS/Cd1-xZnxSe1-ySy NPLs was observed due to the delocalization of electron in the shell. Resulting core/shell NPLs exhibited large Stokes’ shift which can possibly reduce re-absorption. Core/shell/shell NPLs exhibited excellent photo-stability compared to plain CdSe NPLs. Photoluminescence decays of resulting core/shell NPLs was studied. The shape and size of NPLs was characterized using high-resolution transmission electron microscope.

KW - Core/shell platelet

KW - II-VI semiconductor

KW - Photoluminescence decay

KW - Surface passivation

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ER -

Stokes-shift engineered CdSe/CdS/Cd_1-xZn_xSe_1-yS_y nanoplatelets with tunable emission wavelength

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Keywords

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