Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing Beijing100083, China;Institute of Materials, Ningbo University of Technology, Ningbo 315211, China;Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing Beijing100083, China;Institute of Materials, Ningbo University of Technology, Ningbo 315211, China;School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,Southern University of Science and Technology, Shenzhen 518055, China;School of Material Science and Engineering University of New South Wales, Sydney, NSW 2052, Australia;Australian Nuclear Science and Technology Organization, New Illawarra Road, NSW 2234, Australia;School of Material Science and Engineering University of New South Wales, Sydney, NSW 2052, Australia
Abstract:
In the present work, we report the growth of all-inorganic perovskite nanorings with dual compositional phases of CsPbBr3 and CsPb2Br5 via a facile hot injection process. The self-coiling of CsPbBr3-CsPb2Br5 nanorings is driven by the axial stress generated on the outside surface of the as-synthesized nanobelts, which results from the lattice mismatch during the transformation of CsPbBr3 to CsPb2Br5. The tailored growth of nanorings could be achieved by adjusting the key experimental parameters such as reaction temperature, reaction time and stirring speed during the cooling process. The photoluminescence intensity and quantum yield of nanorings are higher than those of CsPbBr3 nanobelts, accompanied by a narrower full width at half maximum (FWHM), suggesting their high potential for constructing self-assembled optoelectronic nanodevices.
