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Title: 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 providesmore » an attainable platform for future optoelectronic devices.« less

Authors:
ORCiD logo [1];  [2];  [3];  [2];  [4]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]
  1. Xi'an Jiaotong Univ., Xi'an (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Xi'an Jiaotong Univ., Xi'an (China)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Xi'an Jiaotong Univ., Xi'an (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1530311
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 9; Journal Issue: 45; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Pan, Aizhao, Jurow, Matthew, Zhao, Yanrui, Qiu, Fen, Liu, Ya, Yang, Juan, Urban, Jeffrey J., He, Ling, and Liu, Yi. Templated self-assembly of one-dimensional CsPbX3 perovskite nanocrystal superlattices. United States: N. p., 2017. Web. doi:10.1039/c7nr06579e.
Pan, Aizhao, Jurow, Matthew, Zhao, Yanrui, Qiu, Fen, Liu, Ya, Yang, Juan, Urban, Jeffrey J., He, Ling, & Liu, Yi. Templated self-assembly of one-dimensional CsPbX3 perovskite nanocrystal superlattices. United States. doi:10.1039/c7nr06579e.
Pan, Aizhao, Jurow, Matthew, Zhao, Yanrui, Qiu, Fen, Liu, Ya, Yang, Juan, Urban, Jeffrey J., He, Ling, and Liu, Yi. Fri . "Templated self-assembly of one-dimensional CsPbX3 perovskite nanocrystal superlattices". United States. doi:10.1039/c7nr06579e. https://www.osti.gov/servlets/purl/1530311.
@article{osti_1530311,
title = {Templated self-assembly of one-dimensional CsPbX3 perovskite nanocrystal superlattices},
author = {Pan, Aizhao and Jurow, Matthew and Zhao, Yanrui and Qiu, Fen and Liu, Ya and Yang, Juan and Urban, Jeffrey J. and He, Ling and Liu, Yi},
abstractNote = {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.},
doi = {10.1039/c7nr06579e},
journal = {Nanoscale},
number = 45,
volume = 9,
place = {United States},
year = {2017},
month = {10}
}

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Cited by: 15 works
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Figures / Tables:

Fig. 1 Fig. 1: (a) TEM image of typical CsPbBr3 NCs with crystal structure image inset. (b) TEM images of pure PbSO4 clusters in hexane from chloroform after 30 min incubation. (c) TEM image of 1D self-assembled superlattices of CsPbBr3 NCs induced by 30 min incubation with clusters of PbSO4 in chloroform.more » (d) PL emission spectra of the same 1D self-assembled superlattices incubated for times up to one month. (e) PXRD pattern (Co K alpha) of PbSO4 clusters, free CsPbBr3 NCs and the self-assembled superlattices at various times.« less

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    Works referencing / citing this record:

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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.