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Single quantum dot spectroscopy for exciton dynamics

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Abstract

Colloidal semiconductor quantum dots (QDs) exhibit broadband light absorption, continuously tunable narrowband emission, and high photoluminescence quantum yields. As such, they represent promising materials for use in light-emitting diodes, solar cells, detectors, and lasers. Single-QD spectroscopy can remove the ensemble averaging to reveal the diverse optical properties and exciton dynamics of QD materials at the single-particle level. The results of relevant research can serve as guidelines for materials science community in tailoring the synthesis of QDs to develop novel applications. This paper reviews recent progress in exciton dynamics revealed by single-QD spectroscopy, focusing on the exciton and multi-exciton dynamics of single colloidal CdSe-based QDs and perovskite QDs. Finally, potential future directions for single-QD spectroscopy and exciton dynamics are briefly considered.

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Ackowledgements

This work was supported by the National Key Research and Development Program of China (No. 2022YFA1404201), the National Natural Science Foundation of China (Nos. 62305201, 62075120, 62075122, 62127817, 62222509, U22A2091, U23A20380, and 62105193), Program for Changjiang Scholars and Innovative Research Team (No. IRT_17R70), Shanxi Province Science and Technology Major Special Project (No. 202201010101005), Fundamental Research Program of Shanxi Province (Nos. 202103021223254 and 202203021221121), Graduate Innovation Project in Shanxi Province (No. 2023KY460), Shanxi Province Science and Technology Innovation Talent Team (No. 202204051001014), Science and Technology Cooperation Project of Shanxi Province (No. 202104041101021), and Shanxi “1331 Project”, 111 projects (No. D18001).

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  1. Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan, 030031, China

    Bin Li, Yuke Gao, Xiaopeng Chen & Ruixiang Wu

  2. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006, China

    Guofeng Zhang, Ruiyun Chen, Chengbing Qin, Jianyong Hu, Liantuan Xiao & Suotang Jia

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  1. Bin Li
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  2. Guofeng Zhang
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Correspondence to Guofeng Zhang or Liantuan Xiao.

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Li, B., Zhang, G., Gao, Y. et al. Single quantum dot spectroscopy for exciton dynamics. Nano Res. (2024). https://doi.org/10.1007/s12274-024-6504-x

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