D. Sun
Solution-processed blue/deep blue and white phosphorescent organic light emitting diodes (PhOLEDs) hosted by a polysiloxane derivative with pendant mCP (1, 3-bis(9-carbazolyl)benzene)
Sun, D.; Zhou, X.; Liu, J.; Sun, X.; Li, H.; Ren, Z.; Ma, D.; Bryce, M.R.; Yan, S.
Authors
X. Zhou
J. Liu
X. Sun
H. Li
Z. Ren
D. Ma
Professor Martin Bryce m.r.bryce@durham.ac.uk
Professor
S. Yan
Abstract
The synthesis and characterization is reported of an efficient polysiloxane derivative containing the 1,3-bis(9-carbazolyl)benzene (mCP) moiety as a pendant unit on the polysiloxane backbone. In comparison with mCP, the mCP-polysiloxane hybrid (PmCPSi) has significantly improved thermal and morphological stabilities with a high decomposition temperature (Td = 523 °C) and glass transition temperature (Tg = 194 °C). The silicon–oxygen linkage of PmCPSi prevents intermolecular π-stacking and ensures a high triplet energy level (ET = 3.0 eV). Using PmCPSi as a host, blue phosphorescent organic light emitting devices (PhOLEDs) effectively confine triplet excitons, with efficient energy transfer to the guest emitter and a relatively low turn-on voltage of 5.8 V. A maximum external quantum efficiency of 9.24% and maximum current efficiency of 18.93 cd/A are obtained. These values are higher than for directly analogous poly(vinylcarbazole) (PVK) based devices (6.76%, 12.29 cd/A). Good color stability over a range of operating voltages is observed. A two-component “warm-white” device with a maximum current efficiency of 10.4 cd/A is obtained using a blend of blue and orange phosphorescent emitters as dopants in PmCPSi host. These results demonstrate that well-designed polysiloxane derivatives are highly efficient hosts suitable for low-cost solution-processed PhOLEDs.
Citation
Sun, D., Zhou, X., Liu, J., Sun, X., Li, H., Ren, Z., …Yan, S. (2015). Solution-processed blue/deep blue and white phosphorescent organic light emitting diodes (PhOLEDs) hosted by a polysiloxane derivative with pendant mCP (1, 3-bis(9-carbazolyl)benzene). ACS Applied Materials and Interfaces, 7(51), 27989-27998. https://doi.org/10.1021/am507592s
Journal Article Type | Article |
---|---|
Publication Date | Dec 30, 2015 |
Deposit Date | Mar 6, 2015 |
Publicly Available Date | Mar 28, 2024 |
Journal | ACS Applied Materials and Interfaces |
Print ISSN | 1944-8244 |
Electronic ISSN | 1944-8252 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 7 |
Issue | 51 |
Pages | 27989-27998 |
DOI | https://doi.org/10.1021/am507592s |
Keywords | Polysiloxane, High triplet energy, Polymeric host, FIrpic, Orange phosphor, Phosphorescent organic light-emitting diod. |
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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © 2015 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/am507592s.
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