Intragrain 3D perovskite heterostructure for high-performance pure-red perovskite LEDs

Yong-Hui Song; Bo Li; Zi-Jian Wang; Xiao-Lin Tai; Guan-Jie Ding; Zi-Du Li; Huaiyu Xu; Jing-Ming Hao; Kuang-Hui Song; Li-Zhe Feng; Ya-Lan Hu; Yi-Chen Yin; Bai-Sheng Zhu; Guozhen Zhang; Huanxin Ju; Guanhaojie Zheng; Wei Hu; Yue Lin; Fengjia Fan; Hong-Bin Yao

doi:10.1038/s41586-025-08867-6

Intragrain 3D perovskite heterostructure for high-performance pure-red perovskite LEDs

Nature. 2025 May;641(8062):352-357. doi: 10.1038/s41586-025-08867-6. Epub 2025 May 7.

Authors

Yong-Hui Song^#^{1

2}, Bo Li^#^{3

4}, Zi-Jian Wang^#⁵, Xiao-Lin Tai^#⁶, Guan-Jie Ding^{1

2}, Zi-Du Li^{3

4}, Huaiyu Xu^{3

4}, Jing-Ming Hao^{1

2}, Kuang-Hui Song^{1

2}, Li-Zhe Feng^{1

2}, Ya-Lan Hu^{1

2}, Yi-Chen Yin^{1

2}, Bai-Sheng Zhu¹, Guozhen Zhang¹, Huanxin Ju⁷, Guanhaojie Zheng^{8

9}, Wei Hu¹⁰, Yue Lin¹¹, Fengjia Fan^{12

13}, Hong-Bin Yao^{14

15}

Affiliations

¹ Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China.
² Department of Applied Chemistry, University of Science and Technology of China, Hefei, China.
³ CAS Key Laboratory of Microscale Magnetic Resonance, School of Physical Sciences and Anhui Province Key Laboratory of Scientific Instrument Development and Application, University of Science and Technology of China, Hefei, China.
⁴ Hefei National Laboratory, University of Science and Technology of China, Hefei, China.
⁵ State Key Laboratory of Precision and Intelligent Chemistry and Department of Chemical Physics, University of Science and Technology of China, Hefei, China.
⁶ Department of Chemistry, University of Science and Technology of China, Hefei, China.
⁷ PHI China Analytical Laboratory, ULVAC-PHI Instruments Co. Ltd., Nanjing, China.
⁸ Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China. zhengguanhaojie@sari.ac.cn.
⁹ University of Chinese Academy of Sciences, Beijing, China. zhengguanhaojie@sari.ac.cn.
¹⁰ State Key Laboratory of Precision and Intelligent Chemistry and Department of Chemical Physics, University of Science and Technology of China, Hefei, China. whuustc@ustc.edu.cn.
¹¹ Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China. linyue@ustc.edu.cn.
¹² CAS Key Laboratory of Microscale Magnetic Resonance, School of Physical Sciences and Anhui Province Key Laboratory of Scientific Instrument Development and Application, University of Science and Technology of China, Hefei, China. ffj@ustc.edu.cn.
¹³ Hefei National Laboratory, University of Science and Technology of China, Hefei, China. ffj@ustc.edu.cn.
¹⁴ Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China. yhb@ustc.edu.cn.
¹⁵ Department of Applied Chemistry, University of Science and Technology of China, Hefei, China. yhb@ustc.edu.cn.

^# Contributed equally.

PMID: 40335712
DOI: 10.1038/s41586-025-08867-6

Abstract

Metal-halide perovskites are promising light-emitter candidates for next-generation light-emitting diodes (LEDs)^1-8. Achieving high brightness and efficiency simultaneously in pure-red perovskite LEDs (PeLEDs) is an ongoing goal^9,10. Three-dimensional (3D) CsPbI_3-xBr_x emitters have excellent carrier transport capability and high colour purity, which could allow efficient and ultrabright pure-red PeLEDs. However, such devices are prone to efficiency roll-off, resulting in low efficiency and low brightness under high current density. Here, by using electrically excited transient absorption spectroscopy, we discovered the efficiency roll-off was induced by hole leakage. Therefore, we developed a CsPbI_3-_xBr_x intragrain heterostructure containing narrow bandgap emitters and wide bandgap barriers to confine the injected carriers. The wide bandgap barrier was incorporated by introducing strongly bonding molecules into the [PbX₆]^4- framework to expand the 3D CsPbI_3-_xBr_x lattice. This strategy resulted in bright and efficient pure-red PeLEDs, with a high brightness of 24,600 cd m^-2, maximum external quantum efficiency of 24.2% and low efficiency roll-off, maintaining a 10.5% external quantum efficiency at a high luminance of 22,670 cd m^-2.