Ultrahigh-radiance TTA-based OLED with 13 kA cm<sup>−2</sup> current injection

Jichen Zhao; Yu Mao; Wansheng Liu; Zengyi Peng; Xu Wang; Jianhua Zou; Jianbin Wang; Dan Chen; Dongge Ma; Hongbin Wu; Bin Hu; Junbiao Peng

doi:10.1038/s41377-025-02134-z

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Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection

Original Articles

- Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection
- Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection
- Light: Science & Applications 2026年15卷第3期页码：984-995
- Affiliations：
  
  1.National Key Laboratory of Luminescence Materials and Devices, South China University of Technology, Guangzhou, China
  2.Jihua Laboratory, Foshan, Guangdong Province, China
  3.Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, Guangzhou, China
  4.Spin-X Institute, South China University of Technology, Guangzhou, China
- Author bio：
  
  Dan Chen (wjfjs2cd@163.com)
  Dongge Ma (msdgma@scut.edu.cn)
  Hongbin Wu (hbwu@scut.edu.cn)
  Bin Hu (bhu@scut.edu.cn)
  Junbiao Peng (psjbpeng@scut.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02134-z
  中图分类号：
- 收稿：2025-08-17，
  
  修回：2025-11-06，
  
  录用：2025-11-12，
  
  网络首发：2026-01-27，
  
  纸质出版：2026-03-31
- Accepted：
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Jichen Zhao, Yu Mao, Wansheng Liu, 等. Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection[J]. Light: Science & Applications, 2026,15(3):984-995.

Zhao, J. C. et al. Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection. Light: Science & Applications, 15, 984-995 (2026).
Jichen Zhao, Yu Mao, Wansheng Liu, 等. Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection[J]. Light: Science & Applications, 2026,15(3):984-995. DOI： 10.1038/s41377-025-02134-z.

Zhao, J. C. et al. Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection. Light: Science & Applications, 15, 984-995 (2026). DOI： 10.1038/s41377-025-02134-z.

摘要

Abstract

Organic semiconductors have been widely utilized in displays

solar cells

detectors

and other fields due to their tunable optoelectronic properties and simple fabrication processes. However

fabricating organic electrically pumped lasers remains an unresolved challenge. The low mobility of organic molecules struggles to sustain the current injection required for electrically pumped lasing

and the free carriers and triplets generated under high current density also quench the gain characteristics. In device fabrication

high-conductivity electrodes and resonant cavities are inevitably accompanied by optical losses

which decrease the quality factor of the resonator and further elevate the threshold current density for electrical pumping. Here

we fabricated an organic light-emitting diode

(OLED) with triplet-triplet annihilation (TTA) characteristics and excellent electrical performance

capable of injecting a current density of 13 kA cm

−2

under 15-ns electrical pulse driving. By leveraging short-pulse driving to mitigate triplet accumulation and utilizing the TTA effect to suppress singlet-triplet annihilation (STA)

the device can still remain nearly 1% external quantum efficiency (EQE) with 1 kA cm

−2

current injection and achieved a record-high output power of 56 W cm

−2

which can sustain population inversion. The OLED was integrated into a high-quality distributed Bragg reflector (DBR) microcavity with ultrathin electrodes

realizing narrow-band light emission with a spectral linewidth of 5.5 nm under 13 kA cm

−2

current injection. This work paves the way for future fabrication of organic electrically pumped lasers with gain characteristics.

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Keywords

references

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Ultrahigh-radiance TTA-based OLED with 13 kA cm−2 current injection

Ultrahigh-radiance TTA-based OLED with 13 kA cm−2 current injection

DOI：10.1038/s41377-025-02134-z

摘要

Abstract

关键词

Keywords

references

Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection

Ultrahigh-radiance TTA-based OLED with 13 kA cm⁻² current injection