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

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.

Authors:
 [1];  [2];  [2];  [1];  [3];  [1]; ORCiD logo [4];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Ecole Polytechnique Fédérale de Lausanne, Lausanne (Switzerland)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)
OSTI Identifier:
1564046
Alternate Identifier(s):
OSTI ID: 1529707
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 11; Journal Issue: 37; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

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., and Sutter-Fella, Carolin M. Low-dimensional perovskite nanoplatelet synthesis using in situ photophysical monitoring to establish controlled growth. United States: N. p., 2019. Web. doi:10.1039/c9nr04010b.
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. Low-dimensional perovskite nanoplatelet synthesis using in situ photophysical monitoring to establish controlled growth. United States. https://doi.org/10.1039/c9nr04010b
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., and Sutter-Fella, Carolin M. Tue . "Low-dimensional perovskite nanoplatelet synthesis using in situ photophysical monitoring to establish controlled growth". United States. https://doi.org/10.1039/c9nr04010b. https://www.osti.gov/servlets/purl/1564046.
@article{osti_1564046,
title = {Low-dimensional perovskite nanoplatelet synthesis using in situ photophysical monitoring to establish controlled growth},
author = {Do, Mai and Kim, Irene and Kolaczkowski, Matthew A. and Kang, Jun and Kamat, Gaurav A. and Yuan, Zhenghao and Barchi, Nicola S. and Wang, Lin -Wang and Liu, Yi and Jurow, Matthew J. and Sutter-Fella, Carolin M.},
abstractNote = {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.},
doi = {10.1039/c9nr04010b},
journal = {Nanoscale},
number = 37,
volume = 11,
place = {United States},
year = {Tue Jun 18 00:00:00 EDT 2019},
month = {Tue Jun 18 00:00:00 EDT 2019}
}

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Free Publicly Available Full Text
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Cited by: 15 works
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Figures / Tables:

Figure 1 Figure 1: UV absorption and PL spectra of (a) 2 unit cell, (b) 4 unit cell and (c) 6 unit cell thick CsPbBr3 nanoplates showing quantum size effects. AFM topography images of CsPbBr3 nanoplates (d) 2 unit cells, (e) 4 unit cells and (f) 6 unit cells thick. The whitemore » lines show the scans for the thickness profile plotted below. Line profiles indicate the thickness of particles to be (g) 2 unit cells, (h) 4 unit cells and (i) 6 unit cells.« less

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