Switching on near-infrared light in lanthanide-doped CsPbCl3 perovskite nanocrystals.
Nanoscale
; 13(17): 8118-8125, 2021 May 06.
Article
en En
| MEDLINE
| ID: mdl-33881122
ABSTRACT
The accessible emission spectral range of lead halide perovskite (LHP) CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) has remained so far limited to wavelengths below 1 µm, corresponding to the emission line of Yb3+, whereas the direct sensitization of other near-infrared (NIR) emitting lanthanide ions is unviable. Herein, we present a general strategy to enable intense NIR emission from Er3+ at â¼1.5 µm, Ho3+ at â¼1.0 µm and Nd3+ at â¼1.06 µm through a Mn2+-mediated energy-transfer pathway. Steady-state and time-resolved photoluminescence studies show that energy-transfer efficiencies of about 39%, 35% and 70% from Mn2+ to Er3+, Ho3+ and Nd3+ are obtained, leading to photoluminescence quantum yields of â¼0.8%, â¼0.7% and â¼3%, respectively. This work provides guidance on constructing energy-transfer pathways in semiconductors and opens new perspectives for the development of lanthanide-functionalized LHPs as promising materials for optoelectronic devices operating in the NIR region.
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MEDLINE
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Revista:
Nanoscale
Año:
2021
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Article