Water-Stable 1D Hybrid Tin(II) Iodide Emits Broad Light with 36% Photoluminescence Quantum Efficiency
Year: 2020
Type: article
Abstract: The optical and light emission properties of tin and lead halide perovskites are remarkable because of the robust room-temperature (RT) performance, broad wavelength tunability, high efficiency, and good quenching resistance to defects. These highly desirable attributes promise to transform current light-emitting devices, phosphors, and lasers. One disadvantage in most of these materials is the sensitivity to moisture. Here, we report a new air-stable one-dimensional (1D) hybrid lead-free halide material (DAO)Sn 2 I 6 (DAO, 1,8-octyldiammonium) that is resistant to water for more than 15 h. The material exhibits a sharp optical absorption edge at 2.70 eV and a strong broad orange light emission centered at 634 nm, with a full width at half-maximum (fwhm) of 142 nm (0.44 eV). The emission has a long photoluminescence (PL) lifetime of 582 ns, while the intensity is constant over a very broad temperature range (145–415 K) with a photoluminescence quantum yield (PLQY) of at least 20.3% at RT. Above 415 K the material undergoes a structural phase transition from monoclinic ( C 2/ c ) to orthorhombic ( Ibam) accompanied by a red shift in the band gap and a quench in the photoluminescence emission. Density functional theory calculations support the trend in the optical properties and the 1D electronic nature of the structure, where the calculated carrier effective masses along the inorganic chain are significantly lower than those perpendicular to the chain. Thin films of the compound readily fabricated from solutions exhibit the same optical properties, but with improved PLQY of 36%, for a 60 nm thick film, among the highest reported for lead-free low-dimensional 2D and 1D perovskites and metal halides.
DOI: 10.1021/jacs.0c03004
Institutions: Northwestern University, Argonne National Laboratory, Center for Nanoscale Materials, Rice University, Centre National de la Recherche Scientifique, Institut des Sciences Chimiques de Rennes, École Nationale Supérieure de Chimie de Rennes, Université de Rennes, Institut National des Sciences Appliquées de Rennes, Fonctions Optiques pour les Technologies de l’information
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Northwestern University, Institut Universitaire de France, Office of Science, Horizon 2020 Framework Programme, Materials Research Science and Engineering Center, Harvard University, International Institute for Nanotechnology, Northwestern University, Division of Materials Research, Division of Electrical, Communications and Cyber Systems, Basic Energy Sciences
Awards: G1169090945, G1276186940, G2013730506, HYBRID HALIDE PEROVSKITES: NOVEL MATERIALS WITH CONTRAINDICATED PROPERTIES, HIGHLY EFFICIENT SOLAR WATER-SPLITTING USING 3D/2D HYDROPHOBIC PEROVSKITES WITH CORROSION RESISTANT BARRIERS, G336680401, G3454132534, G4285583887, G4289625387, G4578410027, MRSEC: Center for Multifunctional Materials, G4912152698, G5218300437, NNCI: Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource, G7790454983, G8073314406, G8230932042
OpenAlex ID: W3015734355