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<p>Individual lead halide perovskite nanocrystals (PNCs) are promising single-photon emitters but often suffer from photoluminescence blinking. Here, we correlate the photoluminescence blinking behavior of CsPbBr<sub>3</sub> NCs with their second-order correlation functions. We find that even moderate band-edge carrier blinking (BC-blinking) can significantly decrease the PNC’s single-photon purity, while the impact from Auger blinking is much smaller. Additionally, the degree of BC-blinking can introduce significant uncertainties in single-photon purity compared to PNCs with suppressed blinking. Furthermore, we quantitatively correlate the decrease in single-photon purity with BC-blinking severity.</p> Graphical abstract <p></p>

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Blinking compromises the single-photon purity of individual CsPbBr3 perovskite nanocrystals

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Gavin C. Gee,
  • Chenjia Mi,
  • Michael P. LaSala,
  • Wai Tak Yip,
  • Yitong Dong

摘要

Individual lead halide perovskite nanocrystals (PNCs) are promising single-photon emitters but often suffer from photoluminescence blinking. Here, we correlate the photoluminescence blinking behavior of CsPbBr3 NCs with their second-order correlation functions. We find that even moderate band-edge carrier blinking (BC-blinking) can significantly decrease the PNC’s single-photon purity, while the impact from Auger blinking is much smaller. Additionally, the degree of BC-blinking can introduce significant uncertainties in single-photon purity compared to PNCs with suppressed blinking. Furthermore, we quantitatively correlate the decrease in single-photon purity with BC-blinking severity.

Graphical abstract