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High-Efficiency Fast-Radiative Blue-Emitting Perovskite Nanoplatelets and Their Formation Mechanisms
journal contributionposted on 2022-05-19, 16:04 authored by Anqi Zhou, Yujun Xie, Feilong Wang, Rongqing Liang, Qiongrong Ou, Shuyu Zhang
High-efficiency blue perovskite emitters with fast fluorescence radiation are not only crucial to achieving high-quality displays but also highly desired for optical wireless communications and quantum information technologies. Here, we demonstrate the preparation of blue-emitting Eu3+-, Sb3+-, and Ba2+-induced CsPbBr3 nanoplatelets with narrow spectral widths. Among them, Sb3+-doped CsPbBr3 NPLs can reach a photoluminescence quantum yield of 95%, with a very short fluorescence lifetime of 1.48 ns and greatly reduced ligand dosage. Through nuclear magnetic resonance analysis and density functional theory calculations, we find that the dopant–ligand interaction and dopant-induced growth energy barrier decide the growth kinetics of doped nanoplatelets. These mechanisms offer a fresh route to controlling the dimension of nanoscale perovskite emitters and benefit the development of fast-radiative perovskite emitters.
short fluorescence lifetimequantum information technologiesphotoluminescence quantum yieldoptical wireless communicationsnarrow spectral widthsnanoscale perovskite emittersalso highly desiredradiative perovskite emittersfast fluorescence radiation3 subformation mechanisms highemitting perovskite nanoplateletsmechanisms offeremitting euradiative bluequality displaysgrowth kineticsfresh routeefficiency fastdoped nanoplateletsachieving high95 %,48 ns