Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs

Jianghui Wang; Peng Zou; Letian Chen; Zhentao Bai; Hao Liu; Wen-Cheng Chen; Yanping Huo; Ben Zhong Tang; Zujin Zhao

doi:10.1038/s41377-024-01490-6

Your Location：

Home >

Browse articles >

Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs

Original Articles

- Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs
- Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs
- LSA 2024年13卷第7期页码：1372-1382
- Affiliations：
  
  1.State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China
  2.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
  3.School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
- Author bio：
  
  Zujin Zhao (mszjzhao@scut.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01490-6
  中图分类号：
- 收稿日期：2023-12-14，
  
  修回日期：2024-05-09，
  
  录用日期：2024-05-20，
  
  网络出版日期：2024-06-13，
  
  纸质出版日期：2024-07-31
- Accepted：
Scan QR Code
Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs[J]. LSA, 2024,13(7):1372-1382.

Wang, J. H. et al. Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs. Light: Science & Applications, 13, 1372-1382 (2024).
Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs[J]. LSA, 2024,13(7):1372-1382. DOI： 10.1038/s41377-024-01490-6.

Wang, J. H. et al. Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs. Light: Science & Applications, 13, 1372-1382 (2024). DOI： 10.1038/s41377-024-01490-6.

摘要

Abstract

Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials are promising candidates for organic light-emitting diodes (OLEDs) with narrow electroluminescence (EL) spectra. Current researches focus on fabricating hyperfluorescence OLEDs to improve EL efficiencies of MR-TADF emitters by co-doping them with TADF sensitizers in a single host layer. However

in many cases

the polarity of the single host could be not suitable for both blue MR-TADF emitters and blue TADF sensitizers

resulting in broadened EL spectra in high-polar hosts or decreased EL efficiencies in low-polar hosts. Herein

we wish to report an efficient sensitization strategy for blue MR-TADF emitters by constructing an interlayer-sensitizing configuration

in which the blue TADF sensitizers and blue MR-TADF emitters are separated into two closely aligned host layers with high polarity and low polarity

respectively. Based on this strategy

efficient blue hyperfluorescence OLEDs are realized and verified by employing various TADF sensitizers and different MR-TADF emitters

furnishing outstanding external quantum efficiencies of up to 38.8% and narrow EL spectra. These results validate the feasibility and universality of this interlayer sensitization strategy

which provides an effective alternative to high-performance blue hyperfluorescence OLEDs.

关键词

Keywords

references

Zou, Y. et al. High-performance narrowband pure-red OLEDs with external quantum efficiencies up to 36.1% and ultralow efficiency roll-off. Adv. Mater. 34 , 2201442 (2022)..

Zhang, D. D., Huang, T. Y. & Duan, L. Emerging self-emissive technologies for flexible displays. Adv. Mater. 32 , 1902391 (2020)..

Baldo, M. A. et al. Highly efficient phosphorescent emission from organic electroluminescent devices. Nature 395 , 151–154 (1998)..

Nakanotani, H. et al. High-efficiency organic light-emitting diodes with fluorescent emitters. Nat. Commun. 5 , 4016 (2014)..

Chen, H. et al. Efficient sky-blue bipolar delayed fluorescence luminogen for high-performance single emissive layer WOLEDs. Adv. Opt. Mater. 9 , 2002019 (2021)..

Guo, J. J., Zhao, Z. J. & Tang, B. Z. Purely organic materials with aggregation-induced delayed fluorescence for efficient nondoped OLEDs. Adv. Opt. Mater. 6 , 1800264 (2018)..

Wang, H. et al. Highly efficient orange and red phosphorescent organic light-emitting diodes with low roll-off of efficiency using a novel thermally activated delayed fluorescence material as host. Adv. Mater. 27 , 4041–4047 (2015)..

Zhang, D. D. et al. Highly efficient hybrid warm white organic light-emitting diodes using a blue thermally activated delayed fluorescence emitter: exploiting the external heavy-atom effect. Light Sci. Appl. 4 , e232 (2015)..

Huang, R. S. et al. Creating efficient delayed fluorescence luminogens with acridine-based spiro donors to improve horizontal dipole orientation for high-performance OLEDs. Chem. Eng. J. 435 , 134934 (2022)..

Xu, Y. C. et al. Molecular-structure and device-configuration optimizations toward highly efficient green electroluminescence with narrowband emission and high color purity. Adv. Opt. Mater. 8 , 1902142 (2020)..

Chen, B. et al. Efficient bipolar blue AIEgens for high-performance nondoped blue OLEDs and hybrid white OLEDs. Adv. Funct. Mater. 28 , 1803369 (2018)..

Zhao, Z. J. et al. Stereoselective synthesis, efficient light emission, and high bipolar charge mobility of chiasmatic luminogens. Adv. Mater. 23 , 5430–5435 (2011)..

Lee, J. et al. Versatile molecular functionalization for inhibiting concentration quenching of thermally activated delayed fluorescence. Adv. Mater. 29 , 1604856 (2017)..

Hatakeyama, T. et al. Ultrapure blue thermally activated delayed fluorescence molecules: efficient HOMO-LUMO separation by the multiple resonance effect. Adv. Mater. 28 , 2777–2781 (2016)..

Huang, J. et al. Robust luminescent small molecules with aggregation-induced delayed fluorescence for efficient solution-processed OLEDs. J. Mater. Chem. C. 7 , 330–339 (2019)..

Matsui, K. et al. One-shot multiple borylation toward BN-doped nanographenes. J. Am. Chem. Soc. 140 , 1195–1198 (2018)..

Ikeda, N. et al. Solution-processable pure green thermally activated delayed fluorescence emitter based on the multiple resonance effect. Adv. Mater. 32 , 2004072 (2020)..

Lee, H. L., Chung, W. J. & Lee, J. Y. Narrowband and pure violet organic emitter with a full width at half maximum of 14 nm and y color coordinate of below 0.02. Small 16 , 1907569 (2020)..

Patil, V. V., Lee, K. H. & Lee, J. Y. A novel fluorene-indolocarbazole hybrid chromophore to assemble high efficiency deep-blue fluorescent emitters with extended device lifetime. J. Mater. Chem. C. 8 , 3051–3057 (2020)..

Meng, G. Y. et al. Highly efficient and stable deep-blue OLEDs based on narrowband emitters featuring an orthogonal spiro-configured indolo[3,2,1- de ] acridine structure. Chem. Sci. 13 , 5622–5630 (2022)..

Wang, Y. X. et al. The selective regulation of borylation site based on one-shot electrophilic C-H borylation reaction, achieving highly efficient narrowband organic light-emitting diodes. Chem. Eng. J. 431 , 133221 (2022)..

Zhan, L. S. et al. Copper(Ⅰ) complex as sensitizer enables high-performance organic light-emitting diodes with very low efficiency roll-off. Adv. Funct. Mater. 31 , 2106345 (2021)..

Xu, Y. C. et al. Highly efficient electroluminescence from narrowband green circularly polarized multiple resonance thermally activated delayed fluorescence enantiomers. Adv. Mater. 33 , 2100652 (2021)..

Liu, Y. et al. Molecular design of thermally activated delayed fluorescent emitters for narrowband orange-red OLEDs boosted by a cyano-functionalization strategy. Chem. Sci. 12 , 9408–9412 (2021)..

Zhang, D. D. et al. High-efficiency fluorescent organic light-emitting devices using sensitizing hosts with a small singlet-triplet exchange energy. Adv. Mater. 26 , 5050–5055 (2014)..

Liu, X. K. et al. Nearly 100% triplet harvesting in conventional fluorescent dopant-based organic light-emitting devices through energy transfer from exciplex. Adv. Mater. 27 , 2025–2030 (2015)..

Heimel, P. et al. Unicolored phosphor-sensitized fluorescence for efficient and stable blue OLEDs. Nat. Commun. 9 , 4990 (2018)..

Zhang, D. D. et al. Efficient and stable deep-blue fluorescent organic light-emitting diodes employing a sensitizer with fast triplet upconversion. Adv. Mater. 32 , 1908355 (2020)..

Wang, J. H. et al. Efficient cyan delayed fluorescence luminogen as sensitizing host for OLEDs with high efficiencies and extremely low roll-offs. Chem. Asian J. 18 , e202300076 (2023)..

Higuchi, T., Nakanotani, H. & Adachi, C. High-efficiency white organic light-emitting diodes based on a blue thermally activated delayed fluorescent emitter combined with green and red fluorescent emitters. Adv. Mater. 27 , 2019–2023 (2015)..

Chen, G. W. et al. Triphenylamine-functionalized multiple-resonance TADF emitters with accelerated reverse intersystem crossing and aggregation-induced emission enhancement for narrowband OLEDs. Adv. Funct. Mater. 33 , 2211893 (2023)..

Chen, J. K. et al. Towards efficient blue delayed-fluorescence molecules by modulating torsion angle between electron donor and acceptor. CCS Chem. 5 , 598–606 (2023)..

Zhang, Q. S. et al. Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence. Nat. Photonics 8 , 326–332 (2014)..

Jeon, S. O. et al. High-efficiency, long-lifetime deep-blue organic light-emitting diodes. Nat. Photonics 15 , 208–2 15 (2021)..

Kawamura, Y. et al. Intermolecular interaction and a concentration-quenching mechanism of phosphorescent Ir(Ⅲ) complexes in a solid film. Phys. Rev. Lett. 96 , 017404 (2006)..

Wei, P. C., Zhang, D. D. & Duan, L. Modulation of Förster and Dexter interactions in single-emissive-layer all-fluorescent WOLEDs for improved efficiency and extended lifetime. Adv. Funct. Mater. 30 , 1907083 (2020)..

Wang, Y. X. et al. Multiple-resonance-type TADF emitter as sensitizer improving the performance of blue fluorescent organic light-emitting diodes. Adv. Opt. Mater. 11 , 2202034 (2023)..

Liu, H. et al. Energy-efficient stable hyperfluorescence organic light-emitting diodes with improved color purities and ultrahigh power efficiencies based on low-polar sensitizing systems. Adv. Mater. 35 , 2212237 (2023)..

Han, S. H. & Lee, J. Y. Spatial separation of sensitizer and fluorescent emitter for high quantum efficiency in hyperfluorescent organic light-emitting diodes. J. Mater. Chem. C. 6 , 1504–1508 (2018)..

Zeng, J. J. et al. A multifunction al bipolar luminogen with delayed fluorescence for high-performance monochromatic and color-stable warm-white OLEDs. Adv. Funct. Mater. 30 , 2000019 (2020)..

Kondo, Y. et al. Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter. Nat. Photonics 13 , 678–682 (2019)..

Han, S. H. et al. Ideal blue thermally activated delayed fluorescence emission assisted by a thermally activated delayed fluorescence assistant dopant through a fast reverse intersystem crossing mediated cascade energy transfer process. J. Mater. Chem. C. 7 , 3082–3089 (2019)..

浏览量

Downloads

CSCD

文章被引用时，请邮件提醒。

Submit

工具集

关联资源

Light | 用于构建高性能蓝色超荧光OLED的层间敏化策略

暂无数据