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High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction

We have demonstrated an effective method of enhancing the power efficiency of double–emissive solution-processed blue phosphorescent organic light-emitting diode (PHOLED) by controlling the charge transport in the heterojunction and emissive layer. The first emissive layer consists of poly(vinylcarb...

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Main Authors: Yeoh, K.H., Ng, C.Y.B., Chua, C.L., Talik, N.A., Woon, K.L.
Format: Article
Published: Wiley-VCH Verlag 2013
Subjects:
Q Science (General)
QC Physics
Online Access:http://eprints.um.edu.my/12977/
http://onlinelibrary.wiley.com/doi/10.1002/pssr.201307089/abstract
http://dx.doi.org/10.1002/pssr.201307089
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spelling my.um.eprints.129772015-03-10T04:43:35Z http://eprints.um.edu.my/12977/ High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction Yeoh, K.H. Ng, C.Y.B. Chua, C.L. Talik, N.A. Woon, K.L. Q Science (General) QC Physics We have demonstrated an effective method of enhancing the power efficiency of double–emissive solution-processed blue phosphorescent organic light-emitting diode (PHOLED) by controlling the charge transport in the heterojunction and emissive layer. The first emissive layer consists of poly(vinylcarbazole) (PVK) and bis(4,6 difluorophenylpyridinato-N,C2)picolinatoiridium (FIrpic) mixed with 4,4′,4″-tris(N-carbazolyl)-triphenylamine (TCTA) or 1,3-bis[(4-tert- butylphenyl)-1,3,4 oxidiazolyl] phenylene (OXD-7). The second layer consists of an alcohol-soluble 2,7-bis(diphenylphosphoryl)-9,9′-spirobi[fluorene] (SPPO13) and FIrpic blend. The incorporation of OXD-7 into PVK blurs the interface between the emissive layers and widens the recombination zone while blending TCTA into PVK reduces the hole- injection barrier from PEDOT:PSS to PVK. By adding TCTA or OXD-7 into the first emissive layer, we have achieved a power efficiency of 10 lm/W and 11 lm/W, respectively, at 1000 cd/m2. Wiley-VCH Verlag 2013-06 Article PeerReviewed Yeoh, K.H. and Ng, C.Y.B. and Chua, C.L. and Talik, N.A. and Woon, K.L. (2013) High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction. physica status solidi (RRL) - Rapid Research Letters, 7 (6). pp. 421-424. ISSN 1862-6254 http://onlinelibrary.wiley.com/doi/10.1002/pssr.201307089/abstract http://dx.doi.org/10.1002/pssr.201307089
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Yeoh, K.H.
Ng, C.Y.B.
Chua, C.L.
Talik, N.A.
Woon, K.L.
High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction
description We have demonstrated an effective method of enhancing the power efficiency of double–emissive solution-processed blue phosphorescent organic light-emitting diode (PHOLED) by controlling the charge transport in the heterojunction and emissive layer. The first emissive layer consists of poly(vinylcarbazole) (PVK) and bis(4,6 difluorophenylpyridinato-N,C2)picolinatoiridium (FIrpic) mixed with 4,4′,4″-tris(N-carbazolyl)-triphenylamine (TCTA) or 1,3-bis[(4-tert- butylphenyl)-1,3,4 oxidiazolyl] phenylene (OXD-7). The second layer consists of an alcohol-soluble 2,7-bis(diphenylphosphoryl)-9,9′-spirobi[fluorene] (SPPO13) and FIrpic blend. The incorporation of OXD-7 into PVK blurs the interface between the emissive layers and widens the recombination zone while blending TCTA into PVK reduces the hole- injection barrier from PEDOT:PSS to PVK. By adding TCTA or OXD-7 into the first emissive layer, we have achieved a power efficiency of 10 lm/W and 11 lm/W, respectively, at 1000 cd/m2.
format Article
author Yeoh, K.H.
Ng, C.Y.B.
Chua, C.L.
Talik, N.A.
Woon, K.L.
author_facet Yeoh, K.H.
Ng, C.Y.B.
Chua, C.L.
Talik, N.A.
Woon, K.L.
author_sort Yeoh, K.H.
title High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction
title_short High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction
title_full High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction
title_fullStr High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction
title_full_unstemmed High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction
title_sort high power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction
publisher Wiley-VCH Verlag
publishDate 2013
url http://eprints.um.edu.my/12977/
http://onlinelibrary.wiley.com/doi/10.1002/pssr.201307089/abstract
http://dx.doi.org/10.1002/pssr.201307089
_version_ 1643689427693731840
score 13.211869

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