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The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification

Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) PEDOT : PSS is extensively used as a hole injection layer (HIL) in solution-processed organic light emitting diodes (OLEDs). The high work function of a HIL is crucial in improving OLED efficiency. The work function of PEDOT : PSS is usually a...

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Main Authors: Yeoh, K.H., Talik, N.A., Whitcher, T.J., Ng, C.Y.B., Woon, K.L.
Format: Article
Published: Institute of Physics 2014
Subjects:
Q Science (General)
Online Access:http://eprints.um.edu.my/12989/
http://iopscience.iop.org/0022-3727/47/20/205103/article
http://dx.doi.org/10.1088/0022-3727/47/20/205103
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spelling my.um.eprints.129892015-03-10T07:23:03Z http://eprints.um.edu.my/12989/ The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification Yeoh, K.H. Talik, N.A. Whitcher, T.J. Ng, C.Y.B. Woon, K.L. Q Science (General) Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) PEDOT : PSS is extensively used as a hole injection layer (HIL) in solution-processed organic light emitting diodes (OLEDs). The high work function of a HIL is crucial in improving OLED efficiency. The work function of PEDOT : PSS is usually around 5.1–5.3 eV. By adding perfluorinated ionomer (PFI), the work function of PEDOT : PSS has been reported to reach as high as 5.95 eV. We investigated the effects of PFI-modified PEDOT : PSS in a single-layer solution-processed blue phosphorescent OLED (PHOLED). We observed that high concentrations of a PFI in PEDOT : PSS has detrimental effects on the device efficiency due to the low conductivity of the PFI. Using this approach, blue PHOLEDs with efficiencies of 9.4 lm W−1 (18.2 cd A−1) and 7.9 lm W−1 (20.4 cd A−1) at 100 cd m−2 and 1000 cd m−2, respectively, were demonstrated. Institute of Physics 2014 Article PeerReviewed Yeoh, K.H. and Talik, N.A. and Whitcher, T.J. and Ng, C.Y.B. and Woon, K.L. (2014) The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification. Journal of Physics D: Applied Physics, 47 (205103). pp. 1-6. ISSN 0022-3727 http://iopscience.iop.org/0022-3727/47/20/205103/article http://dx.doi.org/10.1088/0022-3727/47/20/205103
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)
spellingShingle Q Science (General)
Yeoh, K.H.
Talik, N.A.
Whitcher, T.J.
Ng, C.Y.B.
Woon, K.L.
The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification
description Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) PEDOT : PSS is extensively used as a hole injection layer (HIL) in solution-processed organic light emitting diodes (OLEDs). The high work function of a HIL is crucial in improving OLED efficiency. The work function of PEDOT : PSS is usually around 5.1–5.3 eV. By adding perfluorinated ionomer (PFI), the work function of PEDOT : PSS has been reported to reach as high as 5.95 eV. We investigated the effects of PFI-modified PEDOT : PSS in a single-layer solution-processed blue phosphorescent OLED (PHOLED). We observed that high concentrations of a PFI in PEDOT : PSS has detrimental effects on the device efficiency due to the low conductivity of the PFI. Using this approach, blue PHOLEDs with efficiencies of 9.4 lm W−1 (18.2 cd A−1) and 7.9 lm W−1 (20.4 cd A−1) at 100 cd m−2 and 1000 cd m−2, respectively, were demonstrated.
format Article
author Yeoh, K.H.
Talik, N.A.
Whitcher, T.J.
Ng, C.Y.B.
Woon, K.L.
author_facet Yeoh, K.H.
Talik, N.A.
Whitcher, T.J.
Ng, C.Y.B.
Woon, K.L.
author_sort Yeoh, K.H.
title The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification
title_short The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification
title_full The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification
title_fullStr The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification
title_full_unstemmed The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification
title_sort efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification
publisher Institute of Physics
publishDate 2014
url http://eprints.um.edu.my/12989/
http://iopscience.iop.org/0022-3727/47/20/205103/article
http://dx.doi.org/10.1088/0022-3727/47/20/205103
_version_ 1643689431188635648
score 13.211869

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