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High-Efficiency Fast-Radiative Blue-Emitting Perovskite Nanoplatelets and Their Formation Mechanisms
journal contribution
posted on 2022-05-19, 16:04 authored by Anqi Zhou, Yujun Xie, Feilong Wang, Rongqing Liang, Qiongrong Ou, Shuyu ZhangHigh-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.
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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