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Lanthanide Doping into All-Inorganic Heterometallic Halide Layered Double Perovskite Nanocrystals for Multimodal Visible and Near-Infrared Emission

The introduction of lanthanide ions (Ln3+) into all-inorganic lead-free halide perovskites has captured significant attention in optoelectronic applications. However, doping Ln3+ ions into heterometallic halide layered double perovskite (LDP) nanocrystals (NCs) and their associated doping mechanisms...

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Published in:Journal of the American Chemical Society 2024-02, Vol.146 (5), p.3200-3209
Main Authors: Cai, Tong, Shi, Wenwu, Wu, Rongzhen, Chu, Chun, Jin, Na, Wang, Junyu, Zheng, Weiwei, Wang, Xinzhong, Chen, Ou
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cited_by cdi_FETCH-LOGICAL-a324t-b3504a16fec9a0ac1a904a33f316cb7609385bf7eda07eb97d58d025b2d5f9063
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container_issue 5
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container_title Journal of the American Chemical Society
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creator Cai, Tong
Shi, Wenwu
Wu, Rongzhen
Chu, Chun
Jin, Na
Wang, Junyu
Zheng, Weiwei
Wang, Xinzhong
Chen, Ou
description The introduction of lanthanide ions (Ln3+) into all-inorganic lead-free halide perovskites has captured significant attention in optoelectronic applications. However, doping Ln3+ ions into heterometallic halide layered double perovskite (LDP) nanocrystals (NCs) and their associated doping mechanisms remain unexplored. Herein, we report the first colloidal synthesis of Ln3+ (Yb3+, Er3+)-doped LDP NCs utilizing a modified hot-injection method. The resulting NCs exhibit efficient near-infrared (NIR) photoluminescence in both NIR-I and NIR-II regions, achieved through energy transfer down-conversion mechanisms. Density functional theory calculations reveal that Ln3+ dopants preferentially occupy the Sb3+ cation positions, resulting in a disruption of local site symmetry of the LDP lattices. By leveraging sensitizations of intermediate energy levels, we delved into a series of Ln3+-doped Cs4M­(II)­Sb2Cl12 (M­(II): Cd2+ or Mn2+) LDP NCs via co-doping strategies. Remarkably, we observe a brightening effect of the predark states of Er3+ dopant in the Er3+-doped Cs4M­(II)­Sb2Cl12 LDP NCs owing to the Mn component acting as an intermediate energy bridge. This study not only advances our understanding of energy transfer mechanisms in doped NCs but also propels all-inorganic LDP NCs for a wider range of optoelectronic applications.
doi_str_mv 10.1021/jacs.3c11164
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title Lanthanide Doping into All-Inorganic Heterometallic Halide Layered Double Perovskite Nanocrystals for Multimodal Visible and Near-Infrared Emission
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