Double-locked narrowband hybrid locally-excited and charge-transfer emitter exhibiting amplified spontaneous emission

Long Chen; Xun Tang; Ruihong Liu; Qi Zheng; Youjun Yu; Dongying Zhou; Shengyi Yang; Chihaya Adachi; Liangsheng Liao; Zuoquan Jiang

doi:10.59717/j.xinn-mater.2023.100026

The Innovation Materials > 2023 Vol. 1 > No. 2 > 100026

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Double-locked narrowband hybrid locally-excited and charge-transfer emitter exhibiting amplified spontaneous emission

1.
Institute of Functional Nano & Soft Materials, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, China
2.
Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, 819-0395, Japan
3.
Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa 999078, Macau SAR, China
4.
These authors contributed equally

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Corresponding authors: adachi@cstf.kyushu-u.ac.jp (C. A.); dyzhou@suda.edu.cn (D.Z.); zqjiang@suda.edu.cn (Z.J.);
Received Date: 11 July 2023

Accepted Date: 06 September 2023

Published Online: 07 September 2023

The Innovation Materials 1(2), https://doi.org/10.59717/j.xinn-mater.2023.100026 | Cite this article

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PUBLIC SUMMARY
1. A narrowband locally-excited and charge-transfer emitter is designed and synthesized.
  
  The “double-locked” strategy is an effective approach to narrow the emission spectrum and improve color purity.
  
  The emitter exhibited the full-width at half-maximum of 35, 47, and 11 nm under photoluminescence, electroluminescence, and amplified spontaneous emission, respectively.

ABSTRACT

ABSTRACT

Hybrid Locally-excited and Charge-Transfer (HLCT) materials have garnered significant attention for their high exciton utilization efficiency in organic light-emitting diodes (OLEDs). However, conventional HLCT materials suffer from broad emission, which limits their applications. In this study, we report a narrowband HLCT emitter, namely 10-(dimesitylboranyl)-8,8,12,12-tetraphenyl-8,12-dihydrobenzo[9,1]quinolizino[3,4,5,6,7-klmn]phenoxazine (PXZ-DL), incorporated by double-locked intramolecular connection. PXZ-DL exhibits a narrow emission spectrum with a small full width at half-maximum (FWHM) of 35 nm and 47 nm in solution and as an OLED emitter, respectively. Moreover, PXZ-DL demonstrates a high photoluminescence quantum yield of 100% and an external quantum efficiency of 8.0%. Additionally, PXZ-DL demonstrates excellent performance in amplified spontaneous emission with a low threshold of 5.7 μJ cm^-2 and a narrow FWHM of 11 nm. The intramolecular lock strategy offers a promising approach for the development of HLCT materials with high color purity.

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REFERENCES

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Chen L., Tang X., Liu R., et al., (2023). Double-locked narrowband hybrid locally-excited and charge-transfer emitter exhibiting amplified spontaneous emission. The Innovation Materials 1(2), 100026. https://doi.org/10.59717/j.xinn-mater.2023.100026

Chen L., Tang X., Liu R., et al., (2023). Double-locked narrowband hybrid locally-excited and charge-transfer emitter exhibiting amplified spontaneous emission. The Innovation Materials 1(2), 100026. https://doi.org/10.59717/j.xinn-mater.2023.100026

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Double-locked narrowband hybrid locally-excited and charge-transfer emitter exhibiting amplified spontaneous emission

GRAPHICAL ABSTRACT

PUBLIC SUMMARY

ABSTRACT