White polymer light-emitting diodes based on star-shaped polymers with an orange dendritic phosphorescent core.
Macromol Rapid Commun
; 35(24): 2071-6, 2014 Dec.
Article
em En
| MEDLINE
| ID: mdl-25363235
ABSTRACT
A series of new star-shaped polymers with a triphenylamine-based iridium(III) dendritic complex as the orange-emitting core and poly(9,9-dihexylfluorene) (PFH) chains as the blue-emitting arms is developed towards white polymer light-emitting diodes (WPLEDs). By fine-tuning the content of the orange phosphor, partial energy transfer and charge trapping from the blue backbone to the orange core is realized to achieve white light emission. Single-layer WPLEDs with the configuration of ITO (indium-tin oxide)/poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (PEDOTPSS)/polymer/CsF/Al exhibit a maximum current efficiency of 1.69 cd A(-1) and CIE coordinates of (0.35, 0.33), which is very close to the pure white-light point of (0.33, 0.33). To the best of our knowledge, this is the first report on star-shaped white-emitting single polymers that simultaneously consist of fluorescent and phosphorescent species.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polímeros
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Luminescência
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Eletrônica
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Dendrímeros
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Luz
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article