journal article·2023-01-11

Study of the Interfacial Oxidation of InP Quantum Dots Synthesized from Tris(dimethylamino)phosphine

Xijian Duan, Jingrui Ma, Wenda Zhang, Pai Liu, Haochen Liu, Junjie Hao, Kai Wang, Lars Samuelson, Xiao Wei Sun

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Abstract

InP quantum dots (QDs) are the most competitive in terms of environmentally friendly QDs. However, the synthesis of InP QDs requires breakthroughs in low-cost and safe phosphorus precursors such as tri(dimethylamino)phosphine [(DMA)3P]. It is found that even if the oxygen is completely avoided, there are still oxidation state defects at the core/shell interface of InP QDs. Herein, the record-breaking (DMA)3P-based red InP QDs were synthesized with the assist of HF processing to eliminate the InPOx defect and improve the fluorescence efficiency. The maximum photoluminescence quantum yield was 97.7%, which is the highest of the red InP QDs synthesized by the aminophosphine. The external quantum efficiency and brightness of the QD light-emitting diode device are also improved accordingly from 0.6% and 1276 cd·m–2 to 3.5% and 2355 cd·m–2, respectively.
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Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Carbon and Quantum Dots Applications · Silicon Nanostructures and Photoluminescence

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting, Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen518055, People’s Republic of China

Institute of Nanoscience and Applications, Southern University of Science and Technology, Shenzhen518055, People’s Republic of China

Key Laboratory of Energy Conversion and Storage Technologies, Ministry of Education, Southern University of Science and Technology, Shenzhen518055, People’s Republic of China

Hainan Provincial Key Laboratory of Fine Chemicals, Hainan University, Haikou570228, People’s Republic of China

Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong SAR999077, People’s Republic of China

Solid State Physics and NanoLund, Lund University, Lund22100, Sweden

Funding

Ministry of Science and Technology of the People's Republic of China · Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting · National Natural Science Foundation of China · Key-Area Research and Development Program of Guangdong Province

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