Efficient blue light-emitting diodes based on quantum-confined bromide perovskite nanostructures

Liu, Yang; Cui, Jieyuan; Deng, Yunzhou; Tian, He; He, Zhuofei; Zhou, Qiaohui; Yang, Zhaoliang; Deng, Yunzhou; Chen, Dong; Zuo, Xiaobing; Ren, Yang; Wang, Liang; Zhu, Haiming; Zhao, Baodan; Di, Dawei; Wang, Jianpu; Friend, Richard H.; Jin, Yizheng

doi:10.1038/s41566-019-0505-4

Title: Efficient blue light-emitting diodes based on quantum-confined bromide perovskite nanostructures

Journal Article · Mon Aug 19 00:00:00 EDT 2019 · Nature Photonics

DOI:https://doi.org/10.1038/s41566-019-0505-4· OSTI ID:1605102

^[1]; Cui, Jieyuan ^[1]; Deng, Yunzhou ^[1];

^[1]; He, Zhuofei ^[1]; Zhou, Qiaohui ^[1]; Yang, Zhaoliang ^[1]; Deng, Yunzhou ^[1]; Chen, Dong ^[1]; Zuo, Xiaobing ^[2]; Ren, Yang ^[2]; Wang, Liang ^[3];

^[1];

^[4];

^[5];

^[6];

^[4];

^[1]

Zhejiang Univ., Hangzhou (China)
Argonne National Lab. (ANL), Argonne, IL (United States)
Beijing Inst. of Technology (China)
Univ. of Cambridge (United Kingdom). Cavendish Lab.
Univ. of Cambridge (United Kingdom). Cavendish Lab.; Zhejiang Univ., Hangzhou (China)
Nanjing Univ. of Technology (China)

The emergence of inorganic–organic hybrid perovskites, a unique class of solution-processable crystalline semiconductors, provides new opportunities for large-area, low-cost and colour-saturated light-emitting diodes (LEDs) ideal for display and solid-state lighting applications1. However, the performance of blue perovskite LEDs (PeLEDs) is far inferior to that of their near-infrared, red and green counterparts, strongly limiting the practicality of the PeLED technology. Here, we demonstrate blue PeLEDs emitting at 483 nm with colour coordinates of (0.094, 0.184) and operating with a peak external quantum efficiency of up to 9.5% at a luminance of 54 cd m^–2. The devices have a T50 lifetime of 250 s for an initial brightness of 100 cd m^–2. The efficient blue electroluminescence originates from a structure of quantum-confined perovskite nanoparticles embedded within quasi-two-dimensional phases with higher bandgaps, prepared by an antisolvent processing scheme. Our work paves the way towards high-performance PeLEDs in the blue region.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Key Research and Development Program of China; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1605102

Journal Information:: Nature Photonics, Vol. 13, Issue 11; ISSN 1749-4885

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 346 works

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