Nanorod Suprastructures from a Ternary Graphene Oxide–Polymer–CsPbX3 Perovskite Nanocrystal Composite That Display High Environmental Stability

Pan, Aizhao; Jurow, Matthew J.; Qiu, Fen; Yang, Juan; Ren, Baoyi; Urban, Jeffrey J.; He, Ling; Liu, Yi

doi:10.1021/acs.nanolett.7b02959

Title: Nanorod Suprastructures from a Ternary Graphene Oxide–Polymer–CsPbX₃ Perovskite Nanocrystal Composite That Display High Environmental Stability

Journal Article · Mon Oct 02 00:00:00 EDT 2017 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.7b02959· OSTI ID:1599776

Pan, Aizhao ^[1];

^[2]; Qiu, Fen ^[2]; Yang, Juan ^[2]; Ren, Baoyi ^[3];

^[2]; He, Ling ^[4];

^[2]

Xi'an Jiaotong Univ. (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Shenyang Univ. of Chemical Technology (China)
Xi'an Jiaotong Univ. (China)

Despite the exceptional optoelectronic characteristics of the emergent perovskite nanocrystals, the ionic nature greatly limits their stability, and thus restricts their potential applications. Here we have adapted a self-assembly strategy to access a rarely reported nanorod suprastructure that provide excellent encapsulation of perovskite nanocrystals by polymer-grafted graphene oxide layers. Polyacrylic acid-grafted graphene oxide (GO-g-PAA) was used as a surface ligand during the synthesis of the CsPbX₃ perovskite nanocrystals (NCs), yielding particles (5-12 nm) with tunable halide compositions that were homogeneously embedded in the GO-g-PAA matrix. The resulting NC-GO-g-PAA exhibits a higher photoluminescence quantum yield than previously reported encapsulated NCs while maintaining an easily tunable bandgap, allowing for emission spanning the visible spectrum. The NC-GO-g-PAA hybrid further self-assembles into well-defined nanorods upon solvent treatment. The resulting nanorod morphology imparts extraordinary chemical stability toward protic solvents such as methanol and water and much enhanced thermal stability. Finally, the introduction of barrier layers by embedding the perovskite NCs in the GO-g-PAA matrix, together with its unique assembly into nanorods, provides a novel strategy to afford robust perovskite emissive materials with environmental stability that may meet or exceed the requirement for optoelectronic applications.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: AC02-05CH11231; 51373133; 51573145

OSTI ID:: 1599776

Journal Information:: Nano Letters, Vol. 17, Issue 11; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 99 works

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A review of stability-enhanced luminescent materials: fabrication and optoelectronic applications Liu, Jiahui; Yang, Zunxian; Ye, Bingqing Journal of Materials Chemistry C, Vol. 7, Issue 17 https://doi.org/10.1039/c8tc06292g	journal	January 2019
All-Inorganic Metal Halide Perovskite Nanocrystals: Opportunities and Challenges Zhang, Qiao; Yin, Yadong ACS Central Science, Vol. 4, Issue 6 https://doi.org/10.1021/acscentsci.8b00201	journal	May 2018

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
hybrid materials
nanorod
perovskite nanocrystals
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self-assembly

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Title: Nanorod Suprastructures from a Ternary Graphene Oxide–Polymer–CsPbX₃ Perovskite Nanocrystal Composite That Display High Environmental Stability