研究目的
Investigating the colloidal synthesis and charge-carrier dynamics of Cs2AgSb1-yBiyX6 (X: Br, Cl; 0 ≤y ≤ 1) double perovskite nanocrystals.
研究成果
The study successfully synthesized Cs2AgSb1-yBiyX6 (X: Br, Cl; 0≤y≤1) double perovskite NCs, revealing two fast trapping processes dominated by intrinsic self-trapping and surface defects trapping. Slow hot-carrier relaxation was observed at high pump fluence, with potential mechanisms discussed. The findings contribute to the understanding of charge-carrier dynamics in double perovskite NCs and their potential optoelectronic applications.
研究不足
The challenges involved in the synthesis of bulk double perovskites may be overcome by synthesizing their NCs counterparts, but the high formation energy of Cs2AgSbBr6 and small ionic radius of Sb3+ present difficulties. Additionally, the study of charge carrier dynamics is complex due to the presence of multiple trapping processes and the influence of pump fluence.
