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Deviatoric stress-induced transition of self-trapped exciton emissions

Author

Listed:
  • Chaofan Lv

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Zhengzhou University)

  • Xigui Yang

    (Zhengzhou University)

  • Yanran Wu

    (Zhengzhou University)

  • Feihu Lei

    (Zhengzhou University)

  • Yachuan Liang

    (Zhengzhou University)

  • Dongwen Yang

    (Zhengzhou University)

  • Laizhi Sui

    (Chinese Academy of Sciences)

  • Jinxu Qin

    (Zhengzhou University)

  • Qilong Wu

    (Zhengzhou University)

  • Shoulong Lai

    (Zhengzhou University)

  • Hang Liu

    (Zhengzhou University)

  • Jinhao Zang

    (Zhengzhou University)

  • Shaobo Cheng

    (Zhengzhou University)

  • Kaikai Liu

    (Zhengzhou University)

  • Chongxin Shan

    (Zhengzhou University)

Abstract

Self-trapped exciton (STE) emissions, featured by broad spectral band and minimal self-absorption, have garnered considerable attention for advanced lighting and imaging applications. However, developing strategies to facilitate multiple STE states, modulate the emission energy and extend the emission range remains a great challenge. Here, we introduce deviatoric stress to induce another intrinsic STE state (STE-2) and enable transitions between the intrinsic STE state (STE-1) and STE-2 in pyramidal ZnO nanocrystals. This approach results in a remarkable shift in emission energy, from yellow-green (2.34 eV) to deep-blue (2.88 eV). Combined in-situ stress monitoring and optical experiments show that the STE-2 state originates from a potential well generated by the deviatoric yield deformation of the pyramidal crystals under deviatoric stress. Spectroscopic and dynamical characterizations of the two STE emissions reveal a transition process in the carrier’s relaxation pathway from STE-2 to STE-1, and conversely at much higher pressures. These findings demonstrate that deviatoric stress serves as a robust tool for modulating STE emissions and provide new insights into the evolution of carrier dynamics of STE emissions.

Suggested Citation

  • Chaofan Lv & Xigui Yang & Yanran Wu & Feihu Lei & Yachuan Liang & Dongwen Yang & Laizhi Sui & Jinxu Qin & Qilong Wu & Shoulong Lai & Hang Liu & Jinhao Zang & Shaobo Cheng & Kaikai Liu & Chongxin Shan, 2025. "Deviatoric stress-induced transition of self-trapped exciton emissions," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-57026-y
    DOI: 10.1038/s41467-025-57026-y
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    References listed on IDEAS

    as
    1. Anmin Nie & Yeqiang Bu & Penghui Li & Yizhi Zhang & Tianye Jin & Jiabin Liu & Zhang Su & Yanbin Wang & Julong He & Zhongyuan Liu & Hongtao Wang & Yongjun Tian & Wei Yang, 2019. "Approaching diamond’s theoretical elasticity and strength limits," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    2. Rui Zhou & Laizhi Sui & Xinbao Liu & Kaikai Liu & Dengyang Guo & Wenbo Zhao & Shiyu Song & Chaofan Lv & Shu Chen & Tianci Jiang & Zhe Cheng & Sheng Meng & Chongxin Shan, 2023. "Multiphoton excited singlet/triplet mixed self-trapped exciton emission," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    3. Valery I. Levitas & Achyut Dhar & K. K. Pandey, 2023. "Tensorial stress-plastic strain fields in α - ω Zr mixture, transformation kinetics, and friction in diamond-anvil cell," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
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