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Evolution from unimolecular to colloidal-quantum-dot-like character in chlorine or zinc incorporated InP magic size clusters

Author

Listed:
  • Yongju Kwon

    (Department of Chemistry, Pohang University of Science and Technology)

  • Juwon Oh

    (Department of Chemistry and Spectroscopy Laboratory for Functional π-Electronic Systems, Yonsei University
    Department of Chemistry, University of California)

  • Eunjae Lee

    (Department of Chemistry, Pohang University of Science and Technology)

  • Sang Hyeon Lee

    (Department of Chemistry and Spectroscopy Laboratory for Functional π-Electronic Systems, Yonsei University)

  • Anastasia Agnes

    (Department of Chemistry, Pohang University of Science and Technology)

  • Gyuhyun Bang

    (Department of Chemistry, Pohang University of Science and Technology)

  • Jeongmin Kim

    (Department of Chemistry, Pohang University of Science and Technology)

  • Dongho Kim

    (Department of Chemistry and Spectroscopy Laboratory for Functional π-Electronic Systems, Yonsei University)

  • Sungjee Kim

    (Department of Chemistry, Pohang University of Science and Technology)

Abstract

Magic-sized clusters (MSCs) can be isolated as intermediates in quantum dot (QD) synthesis, and they provide pivotal clues in understanding QD growth mechanisms. We report syntheses for two families of heterogeneous-atom-incorporated InP MSCs that have chlorine or zinc atoms. All the MSCs could be directly synthesized from conventional molecular precursors. Alternatively, each series of MSCs could be prepared by sequential conversions. 386-InP MSCs could be converted to F360-InP:Cl MSCs, then to F399-InP:Cl MSCs. Similarly, F360-InP:Zn MSCs could be converted to F408-InP:Zn MSCs, then to F393-InP:Zn MSCs. As the conversion proceeded, evolution from uni-molecule-like to QD-like characters was observed. Early stage MSCs showed active inter-state conversions in the excited states, which is characteristics of small molecules. Later stage MSCs exhibited narrow photoinduced absorptions at lower-energy region like QDs. The crystal structure also gradually evolved from polytwistane to more zinc-blende.

Suggested Citation

  • Yongju Kwon & Juwon Oh & Eunjae Lee & Sang Hyeon Lee & Anastasia Agnes & Gyuhyun Bang & Jeongmin Kim & Dongho Kim & Sungjee Kim, 2020. "Evolution from unimolecular to colloidal-quantum-dot-like character in chlorine or zinc incorporated InP magic size clusters," Nature Communications, Nature, vol. 11(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16855-9
    DOI: 10.1038/s41467-020-16855-9
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