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Title: Voltage-induced electroluminescence characteristics of hybrid light-emitting diodes with CdSe/Cd/ZnS core-shell nanoparticles embedded in a conducting polymer on plastic substrates

Abstract

We investigate the electroluminescence (EL) characteristics of a hybrid light-emitting diode (HyLED) with an emissive layer comprised of CdSe/Cd/ZnS core-shell nanoparticles (NPs) embedded in poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) on a plastic substrate. The EL characteristics change dramatically with increasing of the biased voltage. At low voltages, recombination of electrons and holes occurs only in the PFO film because of poor charge transfer in the PFO-CdSe/Cd/ZnS NPs composite film, while the color of the light-emitting from the HyLED changes from blue to red as the biased voltage increases from 7.5 to 17.5 V. We examine and discuss the mechanism of this color tunability.

Authors:
; ;  [1]
  1. Department of Electrical Engineering, Korea University, Seoul 136-713 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22257048
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CADMIUM; CADMIUM SELENIDES; ELECTRIC POTENTIAL; ELECTROLUMINESCENCE; LIGHT EMITTING DIODES; NANOSTRUCTURES; SUBSTRATES; ZINC SULFIDES

Citation Formats

Kwak, Kiyeol, Cho, Kyoungah, and Kim, Sangsig. Voltage-induced electroluminescence characteristics of hybrid light-emitting diodes with CdSe/Cd/ZnS core-shell nanoparticles embedded in a conducting polymer on plastic substrates. United States: N. p., 2014. Web. doi:10.1063/1.4868643.
Kwak, Kiyeol, Cho, Kyoungah, & Kim, Sangsig. Voltage-induced electroluminescence characteristics of hybrid light-emitting diodes with CdSe/Cd/ZnS core-shell nanoparticles embedded in a conducting polymer on plastic substrates. United States. https://doi.org/10.1063/1.4868643
Kwak, Kiyeol, Cho, Kyoungah, and Kim, Sangsig. 2014. "Voltage-induced electroluminescence characteristics of hybrid light-emitting diodes with CdSe/Cd/ZnS core-shell nanoparticles embedded in a conducting polymer on plastic substrates". United States. https://doi.org/10.1063/1.4868643.
@article{osti_22257048,
title = {Voltage-induced electroluminescence characteristics of hybrid light-emitting diodes with CdSe/Cd/ZnS core-shell nanoparticles embedded in a conducting polymer on plastic substrates},
author = {Kwak, Kiyeol and Cho, Kyoungah and Kim, Sangsig},
abstractNote = {We investigate the electroluminescence (EL) characteristics of a hybrid light-emitting diode (HyLED) with an emissive layer comprised of CdSe/Cd/ZnS core-shell nanoparticles (NPs) embedded in poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) on a plastic substrate. The EL characteristics change dramatically with increasing of the biased voltage. At low voltages, recombination of electrons and holes occurs only in the PFO film because of poor charge transfer in the PFO-CdSe/Cd/ZnS NPs composite film, while the color of the light-emitting from the HyLED changes from blue to red as the biased voltage increases from 7.5 to 17.5 V. We examine and discuss the mechanism of this color tunability.},
doi = {10.1063/1.4868643},
url = {https://www.osti.gov/biblio/22257048}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 10,
volume = 104,
place = {United States},
year = {Mon Mar 10 00:00:00 EDT 2014},
month = {Mon Mar 10 00:00:00 EDT 2014}
}