Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time Operation

The article describes three different ways of polymer light-emitting diode (PLED) degradation, caused by damage of the protective layer. The electroluminescence and charge-transport properties of a completely encapsulated diode, the diodes with a leaky protective layer and diodes without encapsulati...

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Main Authors: Ruslana Udovytska, Pavel Chulkin, Aleksandra Wypych-Puszkarz, Jaroslaw Jung
Format: Article
Language:English
Published: MDPI AG 2021-06-01
Series:Polymers
Subjects:
Online Access:https://www.mdpi.com/2073-4360/13/11/1853
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spelling doaj-e0da5489dd004eeea64bccd89c1aadb52021-06-30T23:09:26ZengMDPI AGPolymers2073-43602021-06-01131853185310.3390/polym13111853Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time OperationRuslana Udovytska0Pavel Chulkin1Aleksandra Wypych-Puszkarz2Jaroslaw Jung3Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, PolandFaculty of Chemistry, Silesian University of Technology, Strzody 9 str., 44-100 Gliwice, PolandDepartment of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, PolandDepartment of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, PolandThe article describes three different ways of polymer light-emitting diode (PLED) degradation, caused by damage of the protective layer. The electroluminescence and charge-transport properties of a completely encapsulated diode, the diodes with a leaky protective layer and diodes without encapsulation were compared under long-time exploitation. The studied devices incorporated Super Yellow light-emitting poly-(1,4-phenylenevinylene) PPV copolymer as an electroluminescence component, and (poly-(3,4-ethylenedioxythiophene)–poly-(styrene sulfonate) (PEDOT:PSS) as a charge-transport layer between the indium tin oxide (ITO) anode and aluminum–calcium cathode. To analyze the PLED degradation mechanism regarding charge transport, impedance spectroscopy was used. The values of resistance and capacitance of the internal layers revealed an effect of applied voltage on charge carrier injection and recombination. The factors responsible for the device degradation were analyzed on a macromolecular level by comparing the plots of voltage dependence of resistance and capacitance at different operation times elapsed.https://www.mdpi.com/2073-4360/13/11/1853polymer light-emitting diodessuper yelloworganic electronicsimpedance spectroscopyequivalent circuit
collection DOAJ
language English
format Article
sources DOAJ
author Ruslana Udovytska
Pavel Chulkin
Aleksandra Wypych-Puszkarz
Jaroslaw Jung
spellingShingle Ruslana Udovytska
Pavel Chulkin
Aleksandra Wypych-Puszkarz
Jaroslaw Jung
Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time Operation
Polymers
polymer light-emitting diodes
super yellow
organic electronics
impedance spectroscopy
equivalent circuit
author_facet Ruslana Udovytska
Pavel Chulkin
Aleksandra Wypych-Puszkarz
Jaroslaw Jung
author_sort Ruslana Udovytska
title Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time Operation
title_short Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time Operation
title_full Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time Operation
title_fullStr Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time Operation
title_full_unstemmed Three Destinies of Solution-Processable Polymer Light-Emitting Diodes under Long-Time Operation
title_sort three destinies of solution-processable polymer light-emitting diodes under long-time operation
publisher MDPI AG
series Polymers
issn 2073-4360
publishDate 2021-06-01
description The article describes three different ways of polymer light-emitting diode (PLED) degradation, caused by damage of the protective layer. The electroluminescence and charge-transport properties of a completely encapsulated diode, the diodes with a leaky protective layer and diodes without encapsulation were compared under long-time exploitation. The studied devices incorporated Super Yellow light-emitting poly-(1,4-phenylenevinylene) PPV copolymer as an electroluminescence component, and (poly-(3,4-ethylenedioxythiophene)–poly-(styrene sulfonate) (PEDOT:PSS) as a charge-transport layer between the indium tin oxide (ITO) anode and aluminum–calcium cathode. To analyze the PLED degradation mechanism regarding charge transport, impedance spectroscopy was used. The values of resistance and capacitance of the internal layers revealed an effect of applied voltage on charge carrier injection and recombination. The factors responsible for the device degradation were analyzed on a macromolecular level by comparing the plots of voltage dependence of resistance and capacitance at different operation times elapsed.
topic polymer light-emitting diodes
super yellow
organic electronics
impedance spectroscopy
equivalent circuit
url https://www.mdpi.com/2073-4360/13/11/1853
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AT pavelchulkin threedestiniesofsolutionprocessablepolymerlightemittingdiodesunderlongtimeoperation
AT aleksandrawypychpuszkarz threedestiniesofsolutionprocessablepolymerlightemittingdiodesunderlongtimeoperation
AT jaroslawjung threedestiniesofsolutionprocessablepolymerlightemittingdiodesunderlongtimeoperation
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