Simultaneous Long-Persistent Blue Luminescence and High Quantum Yield within 2D Organic-Metal Halide Perovskite Micro/Nanosheets
Zhou, Yan (2019) Simultaneous Long-Persistent Blue Luminescence and High Quantum Yield within 2D Organic-Metal Halide Perovskite Micro/Nanosheets Angew Chem Int Ed Engl (IF: -1) 58(42) 15128-15135Abstract
Molecular solid-state materials with long-lived luminescence (such as thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) systems) are promising for display, sensoring, and bio-imaging applications. However, the design of such materials that exhibit both long luminescent lifetime and high solid-state emissive efficiency remains an open challenge. Two-dimensional (2D) organic-metal halide perovskite materials have a high blue-emitting quantum yield of up to 63.55 % and ultralong TADF lifetime of 103.12 ms at ambient temperature and atmosphere. Our design leverages the combined influences of a 2D space/electronic confinement effect and a modest heavy-atom tuning strategy. Photophysical studies and calculations reveal that the enhanced quantum yield is due to the rigid laminate structure of perovskites, which can effectively inhibit the non-radiative decay of excitons.© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Links
http://www.ncbi.nlm.nih.gov/pubmed/31441190http://dx.doi.org/10.1002/anie.201909760
