Insights into the degradation mechanism of carbene-metal-amide organic light-emitting diodes

Organic light-emitting diodes (OLEDs) based on carbene-metal-amide (CMA) material are fabricated to investigate the fundamental processes that drive degradation in operational CMA OLEDs. The device lifetime of CMA OLEDs decreases rapidly with increased applied current density and implies a bimolecul...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 1; no. 38; pp. 1418 - 14185
Main Authors Matthews, Campbell S. B, Romanov, Alexander S, Greenham, Neil C
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 06.10.2022
Subjects
Carbenes
Degradation
Excitons
Organic light emitting diodes
Service life assessment
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Abstract Organic light-emitting diodes (OLEDs) based on carbene-metal-amide (CMA) material are fabricated to investigate the fundamental processes that drive degradation in operational CMA OLEDs. The device lifetime of CMA OLEDs decreases rapidly with increased applied current density and implies a bimolecular degradation process. Photo- and electrical degradation studies of unipolar devices show that neither holes nor electrons are involved, and degradation is only driven by excitons. Probing of the recombination zone rationalises the degradation rate in OLEDs. We observe that the rate increases with the square of the exciton density and conclude that the degradation in CMA OLEDs is primarily driven by exciton-exciton annihilation. Organic light-emitting diodes (OLEDs) based on carbene-metal-amide (CMA) material are fabricated to investigate the fundamental processes that drive degradation in operational CMA OLEDs.
AbstractList Organic light-emitting diodes (OLEDs) based on carbene–metal–amide (CMA) material are fabricated to investigate the fundamental processes that drive degradation in operational CMA OLEDs. The device lifetime of CMA OLEDs decreases rapidly with increased applied current density and implies a bimolecular degradation process. Photo- and electrical degradation studies of unipolar devices show that neither holes nor electrons are involved, and degradation is only driven by excitons. Probing of the recombination zone rationalises the degradation rate in OLEDs. We observe that the rate increases with the square of the exciton density and conclude that the degradation in CMA OLEDs is primarily driven by exciton–exciton annihilation.
Organic light-emitting diodes (OLEDs) based on carbene-metal-amide (CMA) material are fabricated to investigate the fundamental processes that drive degradation in operational CMA OLEDs. The device lifetime of CMA OLEDs decreases rapidly with increased applied current density and implies a bimolecular degradation process. Photo- and electrical degradation studies of unipolar devices show that neither holes nor electrons are involved, and degradation is only driven by excitons. Probing of the recombination zone rationalises the degradation rate in OLEDs. We observe that the rate increases with the square of the exciton density and conclude that the degradation in CMA OLEDs is primarily driven by exciton-exciton annihilation. Organic light-emitting diodes (OLEDs) based on carbene-metal-amide (CMA) material are fabricated to investigate the fundamental processes that drive degradation in operational CMA OLEDs.
Author Matthews, Campbell S. B
Greenham, Neil C
Romanov, Alexander S
AuthorAffiliation Department of Chemistry
Cavendish Laboratory
University of Manchester
University of Cambridge
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crossref_primary_10_1002_adom_202302815
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Snippet Organic light-emitting diodes (OLEDs) based on carbene-metal-amide (CMA) material are fabricated to investigate the fundamental processes that drive...
Organic light-emitting diodes (OLEDs) based on carbene–metal–amide (CMA) material are fabricated to investigate the fundamental processes that drive...
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SubjectTerms Carbenes
Degradation
Excitons
Organic light emitting diodes
Service life assessment
Title Insights into the degradation mechanism of carbene-metal-amide organic light-emitting diodes
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