Reductive pathways in molten inorganic salts enable colloidal synthesis of III-V semiconductor nanocrystals

Colloidal quantum dots, with their size-tunable optoelectronic properties and scalable synthesis, enable applications in which inexpensive high-performance semiconductors are needed. Synthesis science breakthroughs have been key to the realization of quantum dot technologies, but important group III–group V semiconductors, including colloidal gallium arsenide (GaAs), still cannot be synthesized with existing approaches. The high-temperature molten salt colloidal synthesis introduced in this work enables the preparation of previously intractable colloidal materials. We directly nucleated and grew colloidal quantum dots in molten inorganic salts by harnessing molten salt redox chemistry and using surfactant additives for nanocrystal shape control. Synthesis temperatures above 425°C are critical for realizing photoluminescent GaAs quantum dots, which emphasizes the importance of high temperatures enabled by molten salt solvents. We generalize the methodology and demonstrate nearly a dozen III-V solid-solution nanocrystal compositions that have not been previously reported.

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Publication Details

Journal
Science
Published
2024-10-24
DOI
https://doi.org/10.1126/science.ado7088
Citations
38
Primary Topic
Quantum Dots Synthesis And Properties
Type
article
Field-Weighted Citation Impact
4.45
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article

Reductive pathways in molten inorganic salts enable colloidal synthesis of III-V semiconductor nanocrystals

Sadegh Yazdi, Zirui Zhou, Richard D. Schaller, H. Christopher Fry et al.
38 citations
Science
Quantum Dots Synthesis And Properties
4.45
article

Reductive pathways in molten inorganic salts enable colloidal synthesis of III-V semiconductor nanocrystals

Sadegh Yazdi, Zirui Zhou, Richard D. Schaller, H. Christopher Fry, Kailai Lin, Haoqi Wu, Gordana Duković, Eran Rabani, Dmitri V. Talapin, Benjamin F. Hammel, Ahhyun Jeong, Justin C. Ondry, Di Wang, Aritrajit Gupta, Jun Hyuk Chang
article en
38 citations

Abstract

Colloidal quantum dots, with their size-tunable optoelectronic properties and scalable synthesis, enable applications in which inexpensive high-performance semiconductors are needed. Synthesis science breakthroughs have been key to the realization of quantum dot technologies, but important group III–group V semiconductors, including colloidal gallium arsenide (GaAs), still cannot be synthesized with existing approaches. The high-temperature molten salt colloidal synthesis introduced in this work enables the preparation of previously intractable colloidal materials. We directly nucleated and grew colloidal quantum dots in molten inorganic salts by harnessing molten salt redox chemistry and using surfactant additives for nanocrystal shape control. Synthesis temperatures above 425°C are critical for realizing photoluminescent GaAs quantum dots, which emphasizes the importance of high temperatures enabled by molten salt solvents. We generalize the methodology and demonstrate nearly a dozen III-V solid-solution nanocrystal compositions that have not been previously reported.

ScienceVol. 386(6720)
Northwestern University (US), Argonne National Laboratory (US), Lawrence Berkeley National Laboratory (US), Tel Aviv University (IL), University of Colorado Boulder (US), University of Chicago (US), University of California, Berkeley (US)
Openalex Percentile: Top 2%
Quantum Dots Synthesis And Properties
4.45
DOIOpen Access PDFOpenAlex
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