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Download fileHigh-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