Colloidal CdSe1- xSx Nanoplatelets with Narrow and Continuously-Tunable Electroluminescence

Fengjia Fan; Pongsakorn Kanjanaboos; Mayuran Saravanapavanantham; Eric Beauregard; Grayson Ingram; Emre Yassitepe; Michael M. Adachi; Oleksandr Voznyy; Andrew K. Johnston; Grant Walters; Gi Hwan Kim; Zheng Hong Lu; Edward H. Sargent

doi:10.1021/acs.nanolett.5b01233

Colloidal CdSe_{1- x}S_x Nanoplatelets with Narrow and Continuously-Tunable Electroluminescence

Fengjia Fan, Pongsakorn Kanjanaboos, Mayuran Saravanapavanantham, Eric Beauregard, Grayson Ingram, Emre Yassitepe, Michael M. Adachi, Oleksandr Voznyy, Andrew K. Johnston, Grant Walters, Gi Hwan Kim, Zheng Hong Lu, Edward H. Sargent^*

^*Corresponding author for this work

Chemistry

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

106 Scopus citations

Abstract

Colloidal nanoplatelets, quasi-two-dimensional quantum wells, have recently been introduced as colloidal semiconductor materials with the narrowest known photoluminescence line width (∼10 nm). Unfortunately, these materials have not been shown to have continuously tunable emission but rather emit at discrete wavelengths that depend strictly on atomic-layer thickness. Herein, we report a new synthesis approach that overcomes this issue: by alloying CdSe colloidal nanoplatelets with CdS, we finely tune the emission spectrum while still leveraging atomic-scale thickness control. We proceed to demonstrate light-emitting diodes with sub-bandgap turn-on voltages (2.1 V for a device emitting at 2.4 eV) and the narrowest electroluminescence spectrum (FWHM ∼12.5 nm) reported for colloidal semiconductor LEDs.

Original language	English (US)
Pages (from-to)	4611-4615
Number of pages	5
Journal	Nano letters
Volume	15
Issue number	7
DOIs	https://doi.org/10.1021/acs.nanolett.5b01233
State	Published - Jul 8 2015

Keywords

alloying
CdSeS
colloidal nanoplatelets
electroluminescence
solution-processed light-emitting diodes

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

Access to Document

10.1021/acs.nanolett.5b01233

Cite this

@article{c498f7ff79c94a8abed0dc2be516a890,

title = "Colloidal CdSe1- xSx Nanoplatelets with Narrow and Continuously-Tunable Electroluminescence",

abstract = "Colloidal nanoplatelets, quasi-two-dimensional quantum wells, have recently been introduced as colloidal semiconductor materials with the narrowest known photoluminescence line width (∼10 nm). Unfortunately, these materials have not been shown to have continuously tunable emission but rather emit at discrete wavelengths that depend strictly on atomic-layer thickness. Herein, we report a new synthesis approach that overcomes this issue: by alloying CdSe colloidal nanoplatelets with CdS, we finely tune the emission spectrum while still leveraging atomic-scale thickness control. We proceed to demonstrate light-emitting diodes with sub-bandgap turn-on voltages (2.1 V for a device emitting at 2.4 eV) and the narrowest electroluminescence spectrum (FWHM ∼12.5 nm) reported for colloidal semiconductor LEDs.",

keywords = "alloying, CdSeS, colloidal nanoplatelets, electroluminescence, solution-processed light-emitting diodes",

author = "Fengjia Fan and Pongsakorn Kanjanaboos and Mayuran Saravanapavanantham and Eric Beauregard and Grayson Ingram and Emre Yassitepe and Adachi, {Michael M.} and Oleksandr Voznyy and Johnston, {Andrew K.} and Grant Walters and Kim, {Gi Hwan} and Lu, {Zheng Hong} and Sargent, {Edward H.}",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = jul,

day = "8",

doi = "10.1021/acs.nanolett.5b01233",

language = "English (US)",

volume = "15",

pages = "4611--4615",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "7",

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TY - JOUR

T1 - Colloidal CdSe1- xSx Nanoplatelets with Narrow and Continuously-Tunable Electroluminescence

AU - Fan, Fengjia

AU - Kanjanaboos, Pongsakorn

AU - Saravanapavanantham, Mayuran

AU - Beauregard, Eric

AU - Ingram, Grayson

AU - Yassitepe, Emre

AU - Adachi, Michael M.

AU - Voznyy, Oleksandr

AU - Johnston, Andrew K.

AU - Walters, Grant

AU - Kim, Gi Hwan

AU - Lu, Zheng Hong

AU - Sargent, Edward H.

PY - 2015/7/8

Y1 - 2015/7/8

N2 - Colloidal nanoplatelets, quasi-two-dimensional quantum wells, have recently been introduced as colloidal semiconductor materials with the narrowest known photoluminescence line width (∼10 nm). Unfortunately, these materials have not been shown to have continuously tunable emission but rather emit at discrete wavelengths that depend strictly on atomic-layer thickness. Herein, we report a new synthesis approach that overcomes this issue: by alloying CdSe colloidal nanoplatelets with CdS, we finely tune the emission spectrum while still leveraging atomic-scale thickness control. We proceed to demonstrate light-emitting diodes with sub-bandgap turn-on voltages (2.1 V for a device emitting at 2.4 eV) and the narrowest electroluminescence spectrum (FWHM ∼12.5 nm) reported for colloidal semiconductor LEDs.

AB - Colloidal nanoplatelets, quasi-two-dimensional quantum wells, have recently been introduced as colloidal semiconductor materials with the narrowest known photoluminescence line width (∼10 nm). Unfortunately, these materials have not been shown to have continuously tunable emission but rather emit at discrete wavelengths that depend strictly on atomic-layer thickness. Herein, we report a new synthesis approach that overcomes this issue: by alloying CdSe colloidal nanoplatelets with CdS, we finely tune the emission spectrum while still leveraging atomic-scale thickness control. We proceed to demonstrate light-emitting diodes with sub-bandgap turn-on voltages (2.1 V for a device emitting at 2.4 eV) and the narrowest electroluminescence spectrum (FWHM ∼12.5 nm) reported for colloidal semiconductor LEDs.

KW - alloying

KW - CdSeS

KW - colloidal nanoplatelets

KW - electroluminescence

KW - solution-processed light-emitting diodes

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