In order to endow quasi-2D organic-inorganic hybrid metal halide perovskites (quasi-2D-PVK) with superior performance, an aromatic organic ligand with aggregation-induced emission (AIE) features is rationally designed and utilized for constructing distinctive quasi-2D-PVK materials. This AIE-active ligand, TTPy-NH2 , well fits into the lattices of quasi-2D-PVK and leaves hydrophobic tails surrounding PVK layers, making the presented TTPy-NH2 /PVK film extraordinary in terms of both luminescence and stability. Benefiting from the prominent sensitization function and AIE tendency of TTPy-NH2 , the presented TTPy-NH2 /PVK film exhibits a high quantum yield of 62.2%, unique blue-red dual-emission property of both blue and red, high stability with the remnant of more than 94% fluorescence intensity remnant after 21 days. As a result, TTPy-NH2 /PVK film is capable of constituting high-performance white light-emitting diodes, with its color gamut reaching 138% of the National Television System Committee （NTSC） standard and the maximum efficiency is 105 lm W-1 at 20 mA. Evidently, a win-win effect is achieved by the integration of AIE-active ligands and quasi-2D-PVK, which are two of the most reputable solid-state luminogens. This developed protocol thus opens up a new avenue for exploring the next generation of luminescent devices.
Keywords: aggregation-induced emission; fluorescence resonance energy transfer; quasi-2D hybrid perovskite; white LEDs.
© 2021 The Authors. Advanced Science published by Wiley-VCH GmbH.