Multicomponent perovskite superlattices

Developing multicomponent superlattices (SLs) using lead halide perovskite nanocrystals (NCs) is challenging due to weak ionic bonding and the high mobility of ions. Recently, Kovalenko et al. developed SLs, including binary cubic perovskite-like ternary columnar SLs. The CsPbBr3 are promising building blocks for SLs that produce short, intense bursts light known as superfluorescence (SF) previously observed in HF gas, CuCl-doped NaCl, peroxide ion-doped KCl, InGaAs/GaAs semiconductors.1Rainò G. Becker M.A. Bodnarchuk M.I. Mahrt R.F. M.V. Stöferle T. Superfluorescence from quantum dot superlattices.Nature. 2018; 563: 671-675Crossref PubMed Scopus (236) Google Scholar monocomponent NC-based showed SF their self-organized, highly ordered three-dimensional SL structures. Generally, formation colloidal NCs more favorable than NCs.2Vanmaekelbergh D. Self-assembly route novel classes nanostructured materials.Nano Today. 2011; 6: 419-437Crossref (164) Interestingly, mimic symmetry molecular structures NaZn13, Cu3Au, AlB2, CaCu5 SLs.3Wang Z. Xu X. Gao L. Yan Li Yu J. High-Performance Quasi-2D Perovskite Light-Emitting Diodes Via Poly(vinylpyrrolidone) Treatment.Nanoscale Res. Lett. 2020; 15: 34Crossref (7) governed by several factors such entropy; van der Waals, steric, or dipolar interparticle interactions; size shape NCs.4Shevchenko E.V. Talapin D.V. Kotov N.A. O’Brien S. Murray C.B. Structural diversity nanoparticle 2006; 439: 55-59Crossref (1765) In 1995, first were reported Au CdSe NCs,5Murray Kagan C.R. Bawendi M.G. Self-Organization Nanocrystallites into Three-Dimensional Quantum Dot Superlattices.Science. 1995; 270: 1335-1338Crossref (2064) whereas 2015 (Figure 1A).6Protesescu Yakunin Krieg F. Caputo R. Hendon C.H. Yang R.X. Walsh A. Nanocrystals Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut.Nano 2015; 3692-3696Crossref (4922) After that, different metal ions have been incorporated Au.7Balakrishnan S.K. Kamat P.V. Au-CsPbBr3 Hybrid Architecture: Anchoring Gold Nanoparticles on Cubic Nanocrystals.ACS Energy 2017; 2: 88-93Crossref (106) However, metal-doped only without Different types heterostructures also oxides, chalcogenides, noble metals, 2D materials SLs.8Kamat Pradhan N. Schanze K. Weiss P.S. Buriak Stang P. Odom T.W. Hartland Challenges opportunities designing nanocrystal heterostructures.ACS 5: 2253-2255Crossref (18) Although NC- based excellent emissive qualities, multicomponent-based not investigated. used multinanocrystals, spherical Fe2O3, NaGdF4, truncated-cuboid PbS along all-inorganic perovskite, growing ABO3, AlB2-type SLs.9Cherniukh I. Rainò Burian M. Travesset Naumenko Amenitsch H. Erni Perovskite-type nanocubes.Nature. 2021; 593: 535-542Crossref (49) creation utilizing problematic because, unlike NCs, these adopt multiple orientations within unit cell. A sites ABO3 occupied larger Fe3O4 NaGdF4 B O smaller 1C). ABO3-type inhabited other similar 1D). face-centered (fcc) lattice NaCl-type bigger exist at Na+ Cl positions, respectively 1B). AlB2 found cube’s corners, while solely two opposite faces 1E). Partially was obtained 19.8 nm Fe3O4, 10.7 PbS, 8.6 1F). Columnar achieved 5.3 nanocubes (12.5–26.5 nm) LaF3 nanodisks 1G). At least three radii required generate a typical lattice. discovered could be made because rotational degree freedom non-truncated cuboid shape. long hydrocarbon tail surfactant softens exhibiting sphere-like behavior, which detrimental short-chain utilized substitute long-chain avoid this issue.10Boles Many-body effects superlattices: departure sphere packing explains stability phases.J. Am. Chem. Soc. 137: 4494-4502Crossref (117) These sharp become stuck specific geometry surface deformability. Mixing 14.5–20.7 yielded no (5.3 increased softness. ABO3-, AlB2-, compete paired 15.6–19.8 NCs. preferred when A-site spheres further raised 25.1 nm. carefully adjusted relative diameters nanocubes, nanospheres, truncated nanocubes. Combining 8.6-nm 15.2–19.5 achieved. low temperatures pulsed excitation exciton coherence, transition oscillator strength, disorder energy each NC. pulses short 22 picoseconds, making candidates use ultrafast emitters exceptional efficiency. better higher NC dielectric ratio, shorter distance between characteristic may tuned increasing 16.5 depends substrate used. Si3N4 membrane carbon-coated Cu grid an enhanced SL-substrate interaction conductive carbon film. All findings will pave way development next-generation solid-state emitters. large amount practical applications. demonstrated syntheses kinds substrates TEM (transmission electron microscope) grids, silicon nitride membranes, hydrofluoric acid (HF)-treated silicon. question is: would it possible synthesize quantities substrate? Furthermore, if transition-metal-based employed, fluorescence characteristics multinanocrystal-based dramatically reduced. regard, what optical properties NC-based, have? addition, superfluorescence. Would put non-fluorescent near-infrared-emissive green-light-emitting instead pure one? largely choice substrate. Therefore, proper play essential role device performance. expected demonstrate improved transport, catalytic activity, absorption emission compared scattered Further dedicated research show potential applications newly materials. Finally, we believe various perovskites, create library This work supported NRF (National Research Foundation) , Korea (grant no. 2021R1A4A5031805 ).