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Strain-graded quantum dots with spectrally pure, stable and polarized emission

Author

Listed:
  • Dongju Jung

    (Sungkyunkwan University (SKKU))

  • Jeong Woo Park

    (Sungkyunkwan University (SKKU))

  • Sejong Min

    (Sungkyunkwan University (SKKU))

  • Hak June Lee

    (Sungkyunkwan University (SKKU))

  • Jin Su Park

    (Sungkyunkwan University (SKKU))

  • Gui-Min Kim

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Doyoon Shin

    (Sungkyunkwan University (SKKU))

  • Seongbin Im

    (Sungkyunkwan University (SKKU))

  • Jaemin Lim

    (Sungkyunkwan University (SKKU))

  • Ka Hyung Kim

    (Sungkyunkwan University (SKKU))

  • Jong Ah Chae

    (Sungkyunkwan University (SKKU))

  • Doh C. Lee

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Raphaël Pugin

    (Centre Suisse d’Electronique et de Microtechnique (CSEM SA))

  • Xavier Bulliard

    (Centre Suisse d’Electronique et de Microtechnique (CSEM SA))

  • Euyheon Hwang

    (Sungkyunkwan University (SKKU))

  • Ji-Sang Park

    (Sungkyunkwan University (SKKU))

  • Young-Shin Park

    (Los Alamos National Laboratory)

  • Wan Ki Bae

    (Sungkyunkwan University (SKKU)
    Sungkyunkwan University (SKKU))

Abstract

Structural deformation modifies the bandgap, exciton fine structure and phonon energy of semiconductors, providing an additional knob to control their optical properties. The impact can be exploited in colloidal semiconductor quantum dots (QDs), wherein structural stresses can be imposed in three dimensions while defect formation is suppressed by controlling surface growth kinetics. Yet, the control over the structural deformation of QDs free from optically active defects has not been reached. Here, we demonstrate strain-graded CdSe-ZnSe core-shell QDs with compositionally abrupt interface by the coherent pseudomorphic heteroepitaxy. Resulting QDs tolerate mutual elastic deformation of varying magnitudes at the interface with high structural fidelity, allowing for spectrally stable and pure emission of photons at accelerated rates with near unity luminescence efficiency. We capitalize on the asymmetric strain effect together with the quantum confinement effect to expand emission envelope of QDs spanning the entire visible region and exemplify their use in photonic applications.

Suggested Citation

  • Dongju Jung & Jeong Woo Park & Sejong Min & Hak June Lee & Jin Su Park & Gui-Min Kim & Doyoon Shin & Seongbin Im & Jaemin Lim & Ka Hyung Kim & Jong Ah Chae & Doh C. Lee & Raphaël Pugin & Xavier Bullia, 2024. "Strain-graded quantum dots with spectrally pure, stable and polarized emission," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49791-z
    DOI: 10.1038/s41467-024-49791-z
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    References listed on IDEAS

    as
    1. Fengjia Fan & Oleksandr Voznyy & Randy P. Sabatini & Kristopher T. Bicanic & Michael M. Adachi & James R. McBride & Kemar R. Reid & Young-Shin Park & Xiyan Li & Ankit Jain & Rafael Quintero-Bermudez &, 2017. "Continuous-wave lasing in colloidal quantum dot solids enabled by facet-selective epitaxy," Nature, Nature, vol. 544(7648), pages 75-79, April.
    2. Namyoung Ahn & Clément Livache & Valerio Pinchetti & Heeyoung Jung & Ho Jin & Donghyo Hahm & Young-Shin Park & Victor I. Klimov, 2023. "Electrically driven amplified spontaneous emission from colloidal quantum dots," Nature, Nature, vol. 617(7959), pages 79-85, May.
    3. Hak June Lee & Seongbin Im & Dongju Jung & Kyuri Kim & Jong Ah Chae & Jaemin Lim & Jeong Woo Park & Doyoon Shin & Kookheon Char & Byeong Guk Jeong & Ji-Sang Park & Euyheon Hwang & Doh C. Lee & Young-S, 2023. "Coherent heteroepitaxial growth of I-III-VI2 Ag(In,Ga)S2 colloidal nanocrystals with near-unity quantum yield for use in luminescent solar concentrators," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
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