Low-dimensional perovskite nanoplatelet synthesis using in situ photophysical monitoring to establish controlled growth.

Do, Mai; Kim, Irene; Kolaczkowski, Matthew A; Kang, Jun; Kamat, Gaurav A; Yuan, Zhenghao; Barchi, Nicola S; Wang, Lin-Wang; Liu, Yi; Jurow, Matthew J; Sutter-Fella, Carolin M

Do, Mai; Kim, Irene; Kolaczkowski, Matthew A; Kang, Jun; Kamat, Gaurav A; Yuan, Zhenghao; Barchi, Nicola S; Wang, Lin-Wang; Liu, Yi; Jurow, Matthew J; Sutter-Fella, Carolin M.

Afiliación

Do M; The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yliu@lbl.gov MJurow@lbl.gov.
Kim I; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. csutterfella@lbl.gov and College of Chemistry, University of California, Berkeley, California 94720, USA.
Kolaczkowski MA; The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yliu@lbl.gov MJurow@lbl.gov and College of Chemistry, University of California, Berkeley, California 94720, USA.
Kang J; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Kamat GA; College of Chemistry, University of California, Berkeley, California 94720, USA.
Yuan Z; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. csutterfella@lbl.gov.
Barchi NS; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. csutterfella@lbl.gov and Laboratory of Semiconductor Materials, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
Wang LW; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Liu Y; The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yliu@lbl.gov MJurow@lbl.gov and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Jurow MJ; The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. yliu@lbl.gov MJurow@lbl.gov and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Sutter-Fella CM; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. csutterfella@lbl.gov.

Nanoscale ; 11(37): 17262-17269, 2019 Oct 07.

Article en En | MEDLINE | ID: mdl-31246216

ABSTRACT

ABSTRACT

Perovskite nanoparticles have attracted the attention of research groups around the world for their impressive photophysical properties, facile synthesis and versatile surface chemistry. Here, we report a synthetic route that takes advantage of a suite of soluble precursors to generate CsPbBr3 perovskite nanoplatelets with fine control over size, thickness and optical properties. We demonstrate near unit cell precision, creating well characterized materials with sharp, narrow emission lines at 430, 460 and 490 nm corresponding to nanoplatelets that are 2, 4, and 6 unit cells thick, respectively. Nanoplatelets were characterized with optical spectroscopy, atomic force microscopy, scanning electron microscopy and transmission electron microscopy to explicitly correlate growth conditions, thickness and resulting photophysical properties. Detailed in situ photoluminescence spectroscopic studies were carried out to understand and optimize particle growth by correlating light emission with nanoplatelet growth across a range of synthetic conditions. It was found that nanoplatelet thickness and emission wavelength increase as the ratio of oleic acid to oleyl amine or the reaction temperature is increased. Using this information, we control the lateral size, width and corresponding emission wavelength of the desired nanoplatelets by modulating the temperature and ratios of the ligand.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2019 Tipo del documento: Article