10.1021/acsenergylett.2c00311
https://zenodo.org/records/7019168
oai:zenodo.org:7019168
Bahmani Jalali, Houman
Houman
Bahmani Jalali
Istituto Italiano di Tecnologia,16163 Genova, Italy
Pianetti, Andrea
Andrea
Pianetti
Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca,20125 Milano, Italy
Zito, Juliette
Juliette
Zito
Istituto Italiano di Tecnologia,16163 Genova, Italy
Imran, Muhammad
Muhammad
Imran
Istituto Italiano di Tecnologia,16163 Genova, Italy
Campolucci, Marta
Marta
Campolucci
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova,16146 Genova, Italy
Ivanov, Yurii P.
Yurii P.
Ivanov
Istituto Italiano di Tecnologia,16163 Genova, Italy
Locardi, Federico
Federico
Locardi
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova,16146 Genova, Italy
Infante, Ivan
Ivan
Infante
Istituto Italiano di Tecnologia,16163 Genova, Italy
Divitini, Giorgio
Giorgio
Divitini
Istituto Italiano di Tecnologia,16163 Genova, Italy
Brovelli, Sergio
Sergio
Brovelli
Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca,20125 Milano, Italy
Manna, Liberato
Liberato
Manna
Istituto Italiano di Tecnologia,16163 Genova, Italy
Di Stasio, Francesco
Francesco
Di Stasio
Istituto Italiano di Tecnologia,16163 Genova, Italy
Cesium Manganese Bromide Nanocrystal Sensitizers for Broadband Vis-to-NIR Downshifting
Zenodo
2022
2022-08-24
https://zenodo.org/communities/eu
Creative Commons Attribution 4.0 International
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 (DFT) calculations. This study shows that lead-free metal halides with an appropriate phase are an effective sensitizer for lanthanides and a route to efficient downshifting applications.
European Commission
10.13039/501100000780
851794
Toward single colloidal nanocrystal light-emitting diodes