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      Green-Emitting Lead-Free Cs 4SnBr 6 Zero-Dimensional Perovskite Nanocrystals with Improved Air Stability

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          Abstract

          We report the synthesis and characterization of nanocrystals of a novel fully inorganic lead-free zero-dimensional perovskite, Cs 4SnBr 6. Samples are made of crystals with an average size of ∼20 nm with green emission centered around 530 nm. Interestingly, both colloidal suspensions and thin films show an enhanced air stability with respect to that of any other previous tin-based nanocrystalline system, with emission persisting for tens of hours under laboratory air.

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          VESTA 3for three-dimensional visualization of crystal, volumetric and morphology data

          Koichi Momma, Fujio Izumi (2011)
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            Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut

            Loredana Protesescu, Sergii Yakunin, Maryna Bodnarchuk … (2015)
            Metal halides perovskites, such as hybrid organic–inorganic CH3NH3PbI3, are newcomer optoelectronic materials that have attracted enormous attention as solution-deposited absorbing layers in solar cells with power conversion efficiencies reaching 20%. Herein we demonstrate a new avenue for halide perovskites by designing highly luminescent perovskite-based colloidal quantum dot materials. We have synthesized monodisperse colloidal nanocubes (4–15 nm edge lengths) of fully inorganic cesium lead halide perovskites (CsPbX3, X = Cl, Br, and I or mixed halide systems Cl/Br and Br/I) using inexpensive commercial precursors. Through compositional modulations and quantum size-effects, the bandgap energies and emission spectra are readily tunable over the entire visible spectral region of 410–700 nm. The photoluminescence of CsPbX3 nanocrystals is characterized by narrow emission line-widths of 12–42 nm, wide color gamut covering up to 140% of the NTSC color standard, high quantum yields of up to 90%, and radiative lifetimes in the range of 1–29 ns. The compelling combination of enhanced optical properties and chemical robustness makes CsPbX3 nanocrystals appealing for optoelectronic applications, particularly for blue and green spectral regions (410–530 nm), where typical metal chalcogenide-based quantum dots suffer from photodegradation.
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              Genesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals

              Maksym Kovalenko, Quinten Akkerman, Liberato Manna … (2018)
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                Author and article information

                Journal
                Journal ID (nlm-ta): J Phys Chem Lett
                Journal ID (iso-abbrev): J Phys Chem Lett
                Journal ID (publisher-id): jz
                Journal ID (coden): jpclcd
                Title: The Journal of Physical Chemistry Letters
                Publisher: American Chemical Society
                ISSN (Electronic): 1948-7185
                Publication date (Electronic): 06 January 2020
                Publication date (Print): 06 February 2020
                Volume: 11
                Issue: 3
                Pages: 618-623
                Affiliations
                [† ]Department of Chemistry, University of Pavia and INSTM , Viale Taramelli 16, Pavia 27100, Italy
                [‡ ]Gazi University , Science Faculty, Physics Department, Teknikokullar, 06500 Ankara, Turkey
                [§ ]Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL) , Valais Wallis, Rue de l’Industrie 17, CH-1951 Sion, Switzerland
                Author notes
                [* ]E-mail: lorenzo.malavasi@ 123456unipv.it . Telephone: +39 382 987921.
                Article
                DOI: 10.1021/acs.jpclett.9b03685
                PMC ID: 7901651
                PubMed ID: 31904967
                SO-VID: 5dfd8862-a790-4a13-b3c0-d7532639b1f0
                Copyright ©
                License:

                Made available through a Creative Commons CC-BY License

                History
                Date received : 12 December 2019
                Date accepted : 06 January 2020
                Categories
                Subject: Letter
                Custom metadata
                document-id-old-9 jz9b03685
                document-id-new-14 jz9b03685
                ccc-price

                ScienceOpen disciplines: Physical chemistry
                Data availability:
                ScienceOpen disciplines: Physical chemistry

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