Dianming Sun
A versatile hybrid polyphenylsilane host for highly efficient solution-processed blue and deep blue electrophosphorescence
Sun, Dianming; Zhou, Xiaokang; Li, Huihui; Sun, Xiaoli; Zheng, Yonghao; Ren, Zhongjie; Ma, Dongge; Bryce, Martin R.; Yan, Shouke
Authors
Xiaokang Zhou
Huihui Li
Xiaoli Sun
Yonghao Zheng
Zhongjie Ren
Dongge Ma
Professor Martin Bryce m.r.bryce@durham.ac.uk
Professor
Shouke Yan
Abstract
A universal hybrid polymeric host (PCzSiPh) for blue and deep blue phosphors has been designed and synthesized by incorporating electron-donating carbazole as pendants on a polytetraphenylsilane main chain. The polymer PCzSiPh (4) has a wide bandgap and high triplet energy (ET) because of the tetrahedral geometry of the silicon atom in the tetraphenylsilane backbone. The distinct physical properties of good solubility, combined with high thermal and morphological stability give amorphous and homogenous PCzSiPh films by solution processing. As a result, using PCzSiPh as host with the guest iridium complex TMP-FIrpic gives blue phosphorescent organic light-emitting diodes (PhOLEDs) with overall performance which far exceeds that of a control device with poly(vinylcarbazole) (PVK) host. Notably, FIrpic-based devices exhibit a maximum external quantum efficiency (EQE) of 14.3% (29.3 cd A−1, 10.4 lm W−1) which are comparable to state-of-the-art literature data using polymer hosts for a blue dopant emitter. Moreover, the versatility of PCzSiPh extends to deep blue PhOLEDs using FIr6 and FCNIrpic as dopants, with high efficiencies of 11.3 cd A−1 and 8.6 cd A−1, respectively.
Citation
Sun, D., Zhou, X., Li, H., Sun, X., Zheng, Y., Ren, Z., …Yan, S. (2014). A versatile hybrid polyphenylsilane host for highly efficient solution-processed blue and deep blue electrophosphorescence. Journal of Materials Chemistry C Materials for optical and electronic devices, 2(39), 8277-8284. https://doi.org/10.1039/c4tc01467g
Journal Article Type | Article |
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Publication Date | Oct 21, 2014 |
Deposit Date | Nov 24, 2014 |
Publicly Available Date | Nov 26, 2014 |
Journal | Journal of Materials Chemistry C |
Print ISSN | 2050-7526 |
Electronic ISSN | 2050-7534 |
Publisher | Royal Society of Chemistry |
Peer Reviewed | Peer Reviewed |
Volume | 2 |
Issue | 39 |
Pages | 8277-8284 |
DOI | https://doi.org/10.1039/c4tc01467g |
Public URL | https://durham-repository.worktribe.com/output/1449979 |
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This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.