Integration of Highly Luminescent Lead Halide Perovskite Nanocrystals on Transparent Lead Halide Nanowire Waveguides through Morphological Transformation and Spontaneous Growth in Water.

Autor: Chen T; National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China., Wang C; National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China., Xing X; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA.; Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China., Qin Z; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA.; Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China., Qin F; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA., Wang Y; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA., Alam MK; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA., Hadjiev VG; Department of Mechanical Engineering, University of Houston, Houston, TX, 77204, USA.; Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA., Yang G; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA., Ye S; National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China., Yang J; National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China., Wang R; National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China., Yue S; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA.; Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China., Zhang D; School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA., Shang Z; School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA., Robles-Hernandez FC; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA.; Mechanical Engineering Technology, University of Houston, Houston, TX, 77204, USA., Calderon HA; Instituto Politecnico Nacional, ESFM-IPN, UPALM, Departamento de Física, Mexico CDMX, 07338, Mexico., Wang H; School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA., Wang Z; Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China., Bao J; Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA.; Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2022 Mar; Vol. 18 (11), pp. e2105009. Date of Electronic Publication: 2022 Jan 20.
DOI: 10.1002/smll.202105009
Abstrakt: The integration of highly luminescent CsPbBr 3 quantum dots on nanowire waveguides has enormous potential applications in nanophotonics, optical sensing, and quantum communications. On the other hand, CsPb 2 Br 5 nanowires have also attracted a lot of attention due to their unique water stability and controversial luminescent property. Here, the growth of CsPbBr 3 nanocrystals on CsPb 2 Br 5 nanowires is reported first by simply immersing CsPbBr 3 powder into pure water, CsPbBr 3- γ  X γ (X = Cl, I) nanocrystals on CsPb 2 Br 5 -γ  X γ nanowires are then synthesized for tunable light sources. Systematic structure and morphology studies, including in situ monitoring, reveal that CsPbBr 3 powder is first converted to CsPb 2 Br 5 microplatelets in water, followed by morphological transformation from CsPb 2 Br 5 microplatelets to nanowires, which is a kinetic dissolution-recrystallization process controlled by electrolytic dissociation and supersaturation of CsPb 2 Br 5 . CsPbBr 3 nanocrystals are spontaneously formed on CsPb 2 Br 5 nanowires when nanowires are collected from the aqueous solution. Raman spectroscopy, combined photoluminescence, and SEM imaging confirm that the bright emission originates from CsPbBr 3 -γ  X γ nanocrystals while CsPb 2 Br 5 -γ  X γ nanowires are transparent waveguides. The intimate integration of nanoscale light sources with a nanowire waveguide is demonstrated through the observation of the wave guiding of light from nanocrystals and Fabry-Perot interference modes of the nanowire cavity.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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