Sammanfattning

Low dimensional perovskite-inspired materials with self-tapped exciton (STE) emission have stimulated a surge of cutting-edge research in optoelectronics. Despite numerous efforts on developing versatile low-dimensional perovskite-inspired materials with efficient STE emissions, there is little emphasis on the intrinsic dynamics of STE-based broad emission in these materials. Here, we investigated the excited state dynamics in zero-dimensional (0D) Cs2ZrCl6 nanocrystals (NCs) with efficient blue STE emission. By using femtosecond transient absorption (fs-TA) spectroscopy, the ultrafast STE formation process within 400 fs is directly observed. Then, the formed STEs relax to an intermediate STE state with a lifetime of ∼180 ps before reaching the emissive STE state with a lifetime of ∼15 μs. Our work offers a comprehensive and precise dynamic picture of STE emission in low-dimensional metal halides and sheds light on extending their potential applications.
Originalspråkengelska
Sidor (från-till)7665-7671
Antal sidor7
TidskriftThe Journal of Physical Chemistry Letters
Volym14
Nummer34
DOI
StatusPublished - 2023 aug. 8

Ämnesklassifikation (UKÄ)

  • Atom- och molekylfysik och optik
  • Den kondenserade materiens fysik
  • Fysikalisk kemi

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