Realization of highly efficient white polymer light-emitting devices via interfacial energy transfer from poly(N-vinylcarbazole)

Aiyuan Li; Yuanyuan Li; Wanzhu Cai; Guijiang Zhou; Zhao Chen; Hongbin Wu; Wai Yeung WONG; Wei Yang; Junbiao Peng; Yong Cao

doi:10.1016/j.orgel.2009.12.008

Realization of highly efficient white polymer light-emitting devices via interfacial energy transfer from poly(N-vinylcarbazole)

Aiyuan Li, Yuanyuan Li, Wanzhu Cai, Guijiang Zhou, Zhao Chen, Hongbin Wu^*, Wai Yeung WONG, Wei Yang, Junbiao Peng, Yong Cao

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

33 Citations (Scopus)

Abstract

We report highly efficient white polymer light-emitting devices (WPLEDs) using a newly synthesized, deep-blue emitting fluorene-co-dibenzothiophene-S,S-dioxide copolymer as host, doped with two narrow-bandgap iridium complexes. Despite the low-lying triplet energy levels of the host, phosphorescent quenching by the polyfluorene copolymer host was significantly suppressed with poly(N-vinylcarbazole) (PVK) as hole-injecting, anode buffer layer. The energy transfer process had been studied via transient photoluminescence spectra and confirmed that PVK layer is responsible for the efficient electrophosphorescence in the devices. As a result of balanced red-green-blue (RGB) emission from the host and the triplet emitters, white emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.278, 0.312) was achieved, with a peak luminous efficiency of 15.1 cd A^-1 and a color rendering index (CRI) of 79-86.

Original language	English
Pages (from-to)	529-534
Number of pages	6
Journal	Organic Electronics
Volume	11
Issue number	4
DOIs	https://doi.org/10.1016/j.orgel.2009.12.008
Publication status	Published - Apr 2010

Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

User-Defined Keywords

Phosphorescence quenching
Poly(N-vinylcarbazole)
White polymer light-emitting devices

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10.1016/j.orgel.2009.12.008

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@article{a06e998d375940a3a4d7d099810a92fa,

title = "Realization of highly efficient white polymer light-emitting devices via interfacial energy transfer from poly(N-vinylcarbazole)",

abstract = "We report highly efficient white polymer light-emitting devices (WPLEDs) using a newly synthesized, deep-blue emitting fluorene-co-dibenzothiophene-S,S-dioxide copolymer as host, doped with two narrow-bandgap iridium complexes. Despite the low-lying triplet energy levels of the host, phosphorescent quenching by the polyfluorene copolymer host was significantly suppressed with poly(N-vinylcarbazole) (PVK) as hole-injecting, anode buffer layer. The energy transfer process had been studied via transient photoluminescence spectra and confirmed that PVK layer is responsible for the efficient electrophosphorescence in the devices. As a result of balanced red-green-blue (RGB) emission from the host and the triplet emitters, white emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.278, 0.312) was achieved, with a peak luminous efficiency of 15.1 cd A-1 and a color rendering index (CRI) of 79-86.",

keywords = "Phosphorescence quenching, Poly(N-vinylcarbazole), White polymer light-emitting devices",

author = "Aiyuan Li and Yuanyuan Li and Wanzhu Cai and Guijiang Zhou and Zhao Chen and Hongbin Wu and WONG, {Wai Yeung} and Wei Yang and Junbiao Peng and Yong Cao",

note = "Funding Information: H.-B. Wu thanks the Ministry of Science and Technology Project (No. 2009CB623602) and the Natural Science Foundation of China (Project No. 60937001 , and U0634003 ) and the China Postdoctoral Science Foundation (20060400215) for the financial support. W.-Y. Wong thanks the Hong Kong Research Grants Council ( HKBU 202106 ) and the Hong Kong Baptist University ( FRG2/08-09/111 ) for financial support. ",

year = "2010",

month = apr,

doi = "10.1016/j.orgel.2009.12.008",

language = "English",

volume = "11",

pages = "529--534",

journal = "Organic Electronics",

issn = "1566-1199",

publisher = "Elsevier BV",

number = "4",

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TY - JOUR

T1 - Realization of highly efficient white polymer light-emitting devices via interfacial energy transfer from poly(N-vinylcarbazole)

AU - Li, Aiyuan

AU - Li, Yuanyuan

AU - Cai, Wanzhu

AU - Zhou, Guijiang

AU - Chen, Zhao

AU - Wu, Hongbin

AU - WONG, Wai Yeung

AU - Yang, Wei

AU - Peng, Junbiao

AU - Cao, Yong

N1 - Funding Information: H.-B. Wu thanks the Ministry of Science and Technology Project (No. 2009CB623602) and the Natural Science Foundation of China (Project No. 60937001 , and U0634003 ) and the China Postdoctoral Science Foundation (20060400215) for the financial support. W.-Y. Wong thanks the Hong Kong Research Grants Council ( HKBU 202106 ) and the Hong Kong Baptist University ( FRG2/08-09/111 ) for financial support.

PY - 2010/4

Y1 - 2010/4

N2 - We report highly efficient white polymer light-emitting devices (WPLEDs) using a newly synthesized, deep-blue emitting fluorene-co-dibenzothiophene-S,S-dioxide copolymer as host, doped with two narrow-bandgap iridium complexes. Despite the low-lying triplet energy levels of the host, phosphorescent quenching by the polyfluorene copolymer host was significantly suppressed with poly(N-vinylcarbazole) (PVK) as hole-injecting, anode buffer layer. The energy transfer process had been studied via transient photoluminescence spectra and confirmed that PVK layer is responsible for the efficient electrophosphorescence in the devices. As a result of balanced red-green-blue (RGB) emission from the host and the triplet emitters, white emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.278, 0.312) was achieved, with a peak luminous efficiency of 15.1 cd A-1 and a color rendering index (CRI) of 79-86.

AB - We report highly efficient white polymer light-emitting devices (WPLEDs) using a newly synthesized, deep-blue emitting fluorene-co-dibenzothiophene-S,S-dioxide copolymer as host, doped with two narrow-bandgap iridium complexes. Despite the low-lying triplet energy levels of the host, phosphorescent quenching by the polyfluorene copolymer host was significantly suppressed with poly(N-vinylcarbazole) (PVK) as hole-injecting, anode buffer layer. The energy transfer process had been studied via transient photoluminescence spectra and confirmed that PVK layer is responsible for the efficient electrophosphorescence in the devices. As a result of balanced red-green-blue (RGB) emission from the host and the triplet emitters, white emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.278, 0.312) was achieved, with a peak luminous efficiency of 15.1 cd A-1 and a color rendering index (CRI) of 79-86.

KW - Phosphorescence quenching

KW - Poly(N-vinylcarbazole)

KW - White polymer light-emitting devices

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U2 - 10.1016/j.orgel.2009.12.008

DO - 10.1016/j.orgel.2009.12.008

M3 - Journal article

AN - SCOPUS:77549088328

SN - 1566-1199

VL - 11

SP - 529

EP - 534

JO - Organic Electronics

JF - Organic Electronics

IS - 4

ER -

Realization of highly efficient white polymer light-emitting devices via interfacial energy transfer from poly(N-vinylcarbazole)

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