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Spontaneous crystallization of strongly confined CsSn x Pb 1-x I 3 perovskite colloidal quantum dots at room temperature.
- Source :
-
Nature communications [Nat Commun] 2024 Feb 21; Vol. 15 (1), pp. 1609. Date of Electronic Publication: 2024 Feb 21. - Publication Year :
- 2024
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Abstract
- The scalable and low-cost room temperature (RT) synthesis for pure-iodine all-inorganic perovskite colloidal quantum dots (QDs) is a challenge due to the phase transition induced by thermal unequilibrium. Here, we introduce a direct RT strongly confined spontaneous crystallization strategy in a Cs-deficient reaction system without polar solvents for synthesizing stable pure-iodine all-inorganic tin-lead (Sn-Pb) alloyed perovskite colloidal QDs, which exhibit bright yellow luminescence. By tuning the ratio of Cs/Pb precursors, the size confinement effect and optical band gap of the resultant CsSn <subscript>x</subscript> Pb <subscript>1-x</subscript> I <subscript>3</subscript> perovskite QDs can be well controlled. This strongly confined RT approach is universal for wider bandgap bromine- and chlorine-based all-inorganic and iodine-based hybrid perovskite QDs. The alloyed CsSn <subscript>0.09</subscript> Pb <subscript>0.91</subscript> I <subscript>3</subscript> QDs show superior yellow emission properties with prolonged carrier lifetime and significantly increased colloidal stability compared to the pristine CsPbI <subscript>3</subscript> QDs, which is enabled by strong size confinement, Sn <superscript>2+</superscript> passivation and enhanced formation energy. These findings provide a RT size-stabilized synthesis pathway to achieve high-performance pure-iodine all-inorganic Sn-Pb mixed perovskite colloidal QDs for optoelectronic applications.<br /> (© 2024. The Author(s).)
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 15
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 38383585
- Full Text :
- https://doi.org/10.1038/s41467-024-45945-1