Issue 45, 2017

Templated self-assembly of one-dimensional CsPbX3 perovskite nanocrystal superlattices

Abstract

Ordered self-assembled arrays or superstructures of nanocrystals (NCs) have attracted intense research interest due to their ability to translate valuable nanoscale properties to larger length scales. Numerous techniques have been explored to induce self-assembly into various superstructures. Here we investigated a simple kinetic approach to form self-assembled one-dimensional perovskite CsPbX3 (X: halides) nanocrystal arrays templated inside a pod shaped inert lead sulfate (PbSO4) scaffold. Both the solvent effects, and the self-assembly process and mechanism, are systematically studied based on a uniform procedure developed to generate CsPbX3 nanocrystal superlattices with different sizes and compositions. The formation of one-dimensional (1D) chains of NCs within a half-cylindrical pod of PbSO4 reflects a balance between solvophobicity and solvophilicity of the components. By reducing the size of NCs, we successfully realized 2D superlattices with two or three rows of close-packed CsPbBr3 NCs, in addition to single string-of-pearl type 1D assemblies. The superlattices can be assembled both inside and outside of the half-cylindrical shells by regulating the reaction conditions. The self-assembly behavior is reminiscent of the host–guest systems of organic molecular species where supramolecular recognition rules apply to give well-defined complexes. The current study opens a door for controlling self-assembled nanostructures of CsPbX3 NCs, and provides an attainable platform for future optoelectronic devices.

Graphical abstract: Templated self-assembly of one-dimensional CsPbX3 perovskite nanocrystal superlattices

Supplementary files

Article information

Article type
Communication
Submitted
13 ذو الحجة 1438
Accepted
06 صفر 1439
First published
07 صفر 1439

Nanoscale, 2017,9, 17688-17693

Templated self-assembly of one-dimensional CsPbX3 perovskite nanocrystal superlattices

A. Pan, M. Jurow, Y. Zhao, F. Qiu, Y. Liu, J. Yang, J. J. Urban, L. He and Y. Liu, Nanoscale, 2017, 9, 17688 DOI: 10.1039/C7NR06579E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements