Carbazole-based Multiple Resonance Dendrimers with Narrowband Blue Emission for Solution-Processed OLEDs

Jia-Peng Liu; Liang Chen; Lei Zhao; Cui-Yan Tong; Shu-Meng Wang; Shi-Yang Shao; Li-Xiang Wang

doi:10.1007/s10118-023-2977-4

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Carbazole-based Multiple Resonance Dendrimers with Narrowband Blue Emission for Solution-Processed OLEDs

RESEARCH ARTICLE | Updated：2023-04-21

- Carbazole-based Multiple Resonance Dendrimers with Narrowband Blue Emission for Solution-Processed OLEDs
- Chinese Journal of Polymer Science Vol. 41, Issue 5, Pages: 802-810(2023)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.Institute of Chemistry, Northeast Normal University, Changchun 130024, China
  c.State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, China
- Author bio：
  
  zhaol@ciac.ac.cn (L.Z.)
  tongcy959@nenu.edu.cn (C.Y.T.)
  lixiang@ciac.ac.cn (L.X.W.)
- Funds：
- DOI：10.1007/s10118-023-2977-4
  CLC：
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Jia-Peng Liu, Liang Chen, Lei Zhao, et al. Carbazole-based Multiple Resonance Dendrimers with Narrowband Blue Emission for Solution-Processed OLEDs. [J]. Chinese Journal of Polymer Science 41(5):802-810(2023)
DOI：

Jia-Peng Liu, Liang Chen, Lei Zhao, et al. Carbazole-based Multiple Resonance Dendrimers with Narrowband Blue Emission for Solution-Processed OLEDs. [J]. Chinese Journal of Polymer Science 41(5):802-810(2023) DOI： 10.1007/s10118-023-2977-4.

摘要

Multiple resonance dendrimers are developed by introducing carbazole dendrons in periphery of boron, nitrogen-doped polycyclic aromatic skeleton, which enable narrowband blue electroluminescence with small full-width at half maximum of 24 nm and maximum external quantum efficiency of 17.3% by solution process.

Abstract

Three carbazole-based multiple resonance dendrimers namely D1-BNN, D2-BNN and D3-BNN, are developed for solution-processed narrowband blue organic light-emitting diodes (OLEDs) by introducing the first-, second-, and third-generation carbazole dendrons in periphery of boron, nitrogen-doped polycyclic aromatic hydrocarbon skeleton. Different from D1-BNN containing first-generation carbazole dendron showing moderate photoluminescent quantum efficiency (PLQY) of 68% in solid state and broadened emission bands with full-width at half maximum (FWHM) increasing from 26 nm to 34 nm upon doping concentration growing from 10 wt% to 40 wt%, D3-BNN with the third-generation carbazole dendron exhibits high PLQY of 92% and weak dependence of photoluminescent spectra on doping concentration, which can remain narrowband emissions with unchanged FWHM of 24 nm at same doping concentration range. Solution-processed OLEDs employing D3-BNN as emitter reveal blue electroluminescence at 477 nm with FWHM of 24 nm, and maximum external quantum efficiency (EQE) of 17.3% which is kept at 14.4% at doping concentration of 40 wt%, much superior than the D1-BNN devices showing maximum EQE of 13.0% that drops to 3.7% at 40 wt% doping concentration.

关键词

Keywords

Multiple resonanceDendrimerNarrowbandBlue emissionSolution process

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