TY - JOUR
T1 - Integration of Highly Luminescent Lead Halide Perovskite Nanocrystals on Transparent Lead Halide Nanowire Waveguides through Morphological Transformation and Spontaneous Growth in Water
AU - Chen, Tao
AU - Wang, Chong
AU - Xing, Xinxin
AU - Qin, Zhaojun
AU - Qin, Fan
AU - Wang, Yanan
AU - Alam, Md Kamrul
AU - Hadjiev, Viktor G.
AU - Yang, Guang
AU - Ye, Shuming
AU - Yang, Jie
AU - Wang, Rongfei
AU - Yue, Shuai
AU - Zhang, Di
AU - Shang, Zhongxia
AU - Robles-Hernandez, Francisco C.
AU - Calderon, Hector A.
AU - Wang, Haiyan
AU - Wang, Zhiming
AU - Bao, Jiming
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH
PY - 2022/3/17
Y1 - 2022/3/17
N2 - The integration of highly luminescent CsPbBr3 quantum dots on nanowire waveguides has enormous potential applications in nanophotonics, optical sensing, and quantum communications. On the other hand, CsPb2Br5 nanowires have also attracted a lot of attention due to their unique water stability and controversial luminescent property. Here, the growth of CsPbBr3 nanocrystals on CsPb2Br5 nanowires is reported first by simply immersing CsPbBr3 powder into pure water, CsPbBr3−γ Xγ (X = Cl, I) nanocrystals on CsPb2Br5−γ Xγ nanowires are then synthesized for tunable light sources. Systematic structure and morphology studies, including in situ monitoring, reveal that CsPbBr3 powder is first converted to CsPb2Br5 microplatelets in water, followed by morphological transformation from CsPb2Br5 microplatelets to nanowires, which is a kinetic dissolution–recrystallization process controlled by electrolytic dissociation and supersaturation of CsPb2Br5. CsPbBr3 nanocrystals are spontaneously formed on CsPb2Br5 nanowires when nanowires are collected from the aqueous solution. Raman spectroscopy, combined photoluminescence, and SEM imaging confirm that the bright emission originates from CsPbBr3−γ Xγ nanocrystals while CsPb2Br5−γ Xγ 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.
AB - The integration of highly luminescent CsPbBr3 quantum dots on nanowire waveguides has enormous potential applications in nanophotonics, optical sensing, and quantum communications. On the other hand, CsPb2Br5 nanowires have also attracted a lot of attention due to their unique water stability and controversial luminescent property. Here, the growth of CsPbBr3 nanocrystals on CsPb2Br5 nanowires is reported first by simply immersing CsPbBr3 powder into pure water, CsPbBr3−γ Xγ (X = Cl, I) nanocrystals on CsPb2Br5−γ Xγ nanowires are then synthesized for tunable light sources. Systematic structure and morphology studies, including in situ monitoring, reveal that CsPbBr3 powder is first converted to CsPb2Br5 microplatelets in water, followed by morphological transformation from CsPb2Br5 microplatelets to nanowires, which is a kinetic dissolution–recrystallization process controlled by electrolytic dissociation and supersaturation of CsPb2Br5. CsPbBr3 nanocrystals are spontaneously formed on CsPb2Br5 nanowires when nanowires are collected from the aqueous solution. Raman spectroscopy, combined photoluminescence, and SEM imaging confirm that the bright emission originates from CsPbBr3−γ Xγ nanocrystals while CsPb2Br5−γ Xγ 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.
KW - CsPb Br nanowires
KW - dissolution–recrystalization
KW - luminescence
KW - morphological transformation
KW - nanowire waveguide integration
UR - http://www.scopus.com/inward/record.url?scp=85123089464&partnerID=8YFLogxK
U2 - 10.1002/smll.202105009
DO - 10.1002/smll.202105009
M3 - Artículo
C2 - 35060296
AN - SCOPUS:85123089464
SN - 1613-6810
VL - 18
JO - Small
JF - Small
IS - 11
M1 - 2105009
ER -