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Cesium Manganese Bromide Nanocrystal Sensitizers for Broadband Vis-to-NIR Downshifting.

descriptionPublicationkeyboard_double_arrow_right Article 03 May 2022 Italy Publisher:American Chemical Society (ACS)Journal:ACS Energy Letters, volume 7, pages 1,850-1,858 (issn: 2380-8195, eissn: 2380-8195,

Authors: Bahmani Jalali, Houman; Pianetti, Andrea; Zito, Juliette; Imran, Muhammad; Campolucci, Marta; Ivanov, Yurii P.; Locardi, Federico; +5 Authors

doi: 10.1021/acsenergylett.2c00311

pmid: 35601630

pmc: PMC9112327

handle: 10281/402539 , 11567/1089371

Cesium Manganese Bromide Nanocrystal Sensitizers for Broadband Vis-to-NIR Downshifting.

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Abstract

Simultaneously achieving both broad absorption and sharp emission in the near-infrared (NIR) is challenging. Coupling of an efficient absorber such as lead halide perovskites to lanthanide emissive species is a promising way to meet the demands for visible-to-NIR spectral conversion. However, lead-based perovskite sensitizers suffer from relatively narrow absorption in the visible range, poor stability, and toxicity. Herein, we introduce a downshifting configuration based on lead-free cesium manganese bromide nanocrystals acting as broad visible absorbers coupled to sharp emission in the NIR-I and NIR-II spectral regions. To achieve this, we synthesized CsMnBr3 and Cs3MnBr5 nanocrystals and attempted to dope them with a series of lanthanides, achieving success only with CsMnBr3. The correlation of the lanthanide emission to the CsMnBr3 visible absorption was confirmed with steady-state excitation spectra and time-resolved photoluminescence measurements, whereas the mechanism of downconversion from the CsMnBr3 matrix to the lanthanides was understood by density functional theory calculations. This study shows that lead-free metal halides with an appropriate phase are effective sensitizers for lanthanides and offer a route to efficient downshifting applications.

Country

Italy

Related Organizations

University of Milano-Bicocca
Italy
University of Genoa
Italy
Italian Institute of Technology
Italy
FONDAZIONE ISTITUTO ITALIANO DI TECNOLOGIA
Italy

Keywords

Pb-free Nanocrystals; Rare-earth downshifters; Mn-based technology

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Static magnetic properties of the quasi-one-dimensional hexagonal antiferromagnet CsMnBr₃
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One-dimensional magnetic correlations in the antiferromagnet CsMnBr₃
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Investigation of NMR in the quasi-one-dimensional antiferromagnetic CsMnBr3
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Investigation of a gap in the AFMR spectrum in the quasi-one-dimensional hexagonal antiferromagnet CsMnBr3
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NMR in 55Mn2+ nuclei in the quasi-one-dimensional antiferromagnetic CsMnBr3
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Luminescence Decay As A Probe Of Exciton Motion In One-Dimensional Crystals
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Nuclear magnetic resonance of 55Mn in the antiferromagnet CsMnBr3 in a variable longitudinal magnetic field
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Critical Behaviour in the Specific Heat of an Antiferromagnet with Chiral Symmetry
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Upward Renormalization of Fluctuations inCsMnBr3with Increasing Temperature
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New Tetracritical Behavior in CsMnBr₃
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