Phosphine-free-synthesized znse/zns core/shell quantum dots for white light-emitting diodes

Nyamsuren Byambasuren; Jiyeon Jo; Hyungduk Ko; Byeong Kwon Ju; Ji Young Byun; Ho Seong Jang

doi:10.3390/app112110060

Phosphine-free-synthesized znse/zns core/shell quantum dots for white light-emitting diodes

Nyamsuren Byambasuren, Jiyeon Jo, Hyungduk Ko, Byeong Kwon Ju, Ji Young Byun, Ho Seong Jang

School of Electrical Engineering

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

2 Citations (Scopus)

Abstract

Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-lightemitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LEDpumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], T_c = 3488 K, and R_a = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.

Original language	English
Article number	10060
Journal	Applied Sciences (Switzerland)
Volume	11
Issue number	21
DOIs	https://doi.org/10.3390/app112110060
Publication status	Published - 2021 Nov 1

Keywords

Blue LED
Core/shell structure
Warm white LED
ZnSe/ZnS quantum dots

ASJC Scopus subject areas

Materials Science(all)
Instrumentation
Engineering(all)
Process Chemistry and Technology
Computer Science Applications
Fluid Flow and Transfer Processes

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10.3390/app112110060

Cite this

@article{1b7a048cbd8f443d895b659c848910b5,

title = "Phosphine-free-synthesized znse/zns core/shell quantum dots for white light-emitting diodes",

abstract = "Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-lightemitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LEDpumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], Tc = 3488 K, and Ra = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.",

keywords = "Blue LED, Core/shell structure, Warm white LED, ZnSe/ZnS quantum dots",

author = "Nyamsuren Byambasuren and Jiyeon Jo and Hyungduk Ko and Ju, {Byeong Kwon} and Byun, {Ji Young} and Jang, {Ho Seong}",

note = "Funding Information: This research was supported by the Future Key technology program (2E31181) by the Korea Institute of Science, the Materials Innovation Project (NRF-2020M3H4A3081791) funded by the National Research Foundation of Korea, and the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF- 2019R1A2C2088940). Funding Information: Funding: This research was supported by the Future Key technology program (2E31181) by the Funding: This research was supported by the Future Key technology program (2E31181) by the Korea Institute of Science, the Materials Innovation Project (NRF-2020M3H4A3081791) funded by the National Research Foundation of Korea, and the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2019R1A2C2088940). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = nov,

day = "1",

doi = "10.3390/app112110060",

language = "English",

volume = "11",

journal = "Applied Sciences (Switzerland)",

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T1 - Phosphine-free-synthesized znse/zns core/shell quantum dots for white light-emitting diodes

AU - Byambasuren, Nyamsuren

AU - Jo, Jiyeon

AU - Ko, Hyungduk

AU - Ju, Byeong Kwon

AU - Byun, Ji Young

AU - Jang, Ho Seong

N1 - Funding Information: This research was supported by the Future Key technology program (2E31181) by the Korea Institute of Science, the Materials Innovation Project (NRF-2020M3H4A3081791) funded by the National Research Foundation of Korea, and the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF- 2019R1A2C2088940). Funding Information: Funding: This research was supported by the Future Key technology program (2E31181) by the Funding: This research was supported by the Future Key technology program (2E31181) by the Korea Institute of Science, the Materials Innovation Project (NRF-2020M3H4A3081791) funded by the National Research Foundation of Korea, and the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2019R1A2C2088940). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/11/1

Y1 - 2021/11/1

N2 - Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-lightemitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LEDpumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], Tc = 3488 K, and Ra = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.

AB - Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-lightemitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LEDpumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], Tc = 3488 K, and Ra = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.

KW - Blue LED

KW - Core/shell structure

KW - Warm white LED

KW - ZnSe/ZnS quantum dots

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U2 - 10.3390/app112110060

DO - 10.3390/app112110060

M3 - Article

AN - SCOPUS:85118110353

SN - 2076-3417

VL - 11

JO - Applied Sciences (Switzerland)

JF - Applied Sciences (Switzerland)

IS - 21

M1 - 10060

ER -

Phosphine-free-synthesized znse/zns core/shell quantum dots for white light-emitting diodes

Abstract

Keywords

ASJC Scopus subject areas

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