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Research Article | Online First

One-pot synthesis of Cu:InP multishell quantum dots for near-infrared light-emitting devices

Pan Huang1,2, Xiaonan Liu3, Xiao Liu3, Jing Wei3, Fangze Liu1,2( ), Hongbo Li3( )
Advanced Research Institute of Multidisciplinary Sciences, Beijing Institute of Technology, Zhuhai 519088, China
Advanced Research Institute of Multidisciplinary Sciences, Beijing Institute of Technology, Beijing 100081, China
Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
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Abstract

InP quantum dots (QDs) are promising heavy-metal-free materials for next-generation solid-state lighting, covering from visible to near-infrared (NIR) range. Compared with the rapid development of visible InP QDs, the synthesis of high-performance NIR InP QDs remains to be solved. In this work, we report a simple one-pot synthesis of NIR InP QDs by controlling the Cu doping and designing a multishell structure. By replacing the conventional highly reactive phosphorus precursor with a slightly less reactive and low-cost ammonia phosphorus precursor, the nucleation process is effectively regulated for efficient Cu doping. In addition, the epitaxial growth of the ZnSe/ZnS shell further improves the stability and optical properties of InP QDs. Therefore, the synthesized Cu:InP/ZnSe/ZnS QDs have a photoluminescence quantum yield of 70% centered at 833 nm. The NIR InP light-emitting diodes exhibit a maximum radiance of 3.1 W·sr−1·m−2 and a peak external quantum efficiency of 2.71% centered at 864 nm.

Keywords

near-InfraredInP quantum dotscore–shelllight-emitting diodes

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Nano Research
DOI: 10.1007/s12274-024-6906-0
Cite this article:
Huang P, Liu X, Liu X, et al. One-pot synthesis of Cu:InP multishell quantum dots for near-infrared light-emitting devices. Nano Research, 2024, https://doi.org/10.1007/s12274-024-6906-0
Topics:
Semiconductor quantum dots

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Received: 15 June 2024
Revised: 20 July 2024
Accepted: 21 July 2024
Published: 10 August 2024
© Tsinghua University Press 2024
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