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In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets

We present a facile synthetic approach for the growth of two-dimensional CsPbBr(3) nanoplatelets (NPLs) in the temperature range of 50–80 °C via the vacuum-assisted low-temperature (VALT) method. In this method, we utilized the solubility of the PbBr(2) precursor at temperatures high than the reacti...

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Autores principales: Pathipati, Srinivasa Rao, Shah, Muhammad Naeem, Akhil, Syed, Mishra, Nimai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9642352/
https://www.ncbi.nlm.nih.gov/pubmed/36381516
http://dx.doi.org/10.1039/d2na00354f
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author Pathipati, Srinivasa Rao
Shah, Muhammad Naeem
Akhil, Syed
Mishra, Nimai
author_facet Pathipati, Srinivasa Rao
Shah, Muhammad Naeem
Akhil, Syed
Mishra, Nimai
author_sort Pathipati, Srinivasa Rao
collection PubMed
description We present a facile synthetic approach for the growth of two-dimensional CsPbBr(3) nanoplatelets (NPLs) in the temperature range of 50–80 °C via the vacuum-assisted low-temperature (VALT) method. In this method, we utilized the solubility of the PbBr(2) precursor at temperatures high than the reaction temperature, thus making Br available during the reaction to form NPLs with fewer defects. The high chemical availability of Br during the reaction changes the growth dynamics and formation of highly crystalline nanoplatelets. Using this method, we have synthesized NPLs with an emission wavelength range of 450 to 485 nm that have high photoluminescence quantum yields (PLQY) from 80 to 100%. The synthesized NPLs retain their initial PLQY of about 80% after one month at ambient conditions. The formation of NPLs with fewer defects and enhanced radiative recombination was further confirmed by X-ray diffraction (XRD), reduced Urbach energy, time-resolved photocurrent measurements, X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared (FTIR) spectroscopy. Additionally, we utilized the synthesized NPLs for the fabrication of down-conversion light emitting diodes (LEDs), and the electroluminescence peak was barely shifted compared to the photoluminescence peak.
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spelling pubmed-96423522022-11-14 In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets Pathipati, Srinivasa Rao Shah, Muhammad Naeem Akhil, Syed Mishra, Nimai Nanoscale Adv Chemistry We present a facile synthetic approach for the growth of two-dimensional CsPbBr(3) nanoplatelets (NPLs) in the temperature range of 50–80 °C via the vacuum-assisted low-temperature (VALT) method. In this method, we utilized the solubility of the PbBr(2) precursor at temperatures high than the reaction temperature, thus making Br available during the reaction to form NPLs with fewer defects. The high chemical availability of Br during the reaction changes the growth dynamics and formation of highly crystalline nanoplatelets. Using this method, we have synthesized NPLs with an emission wavelength range of 450 to 485 nm that have high photoluminescence quantum yields (PLQY) from 80 to 100%. The synthesized NPLs retain their initial PLQY of about 80% after one month at ambient conditions. The formation of NPLs with fewer defects and enhanced radiative recombination was further confirmed by X-ray diffraction (XRD), reduced Urbach energy, time-resolved photocurrent measurements, X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared (FTIR) spectroscopy. Additionally, we utilized the synthesized NPLs for the fabrication of down-conversion light emitting diodes (LEDs), and the electroluminescence peak was barely shifted compared to the photoluminescence peak. RSC 2022-10-13 /pmc/articles/PMC9642352/ /pubmed/36381516 http://dx.doi.org/10.1039/d2na00354f Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Pathipati, Srinivasa Rao
Shah, Muhammad Naeem
Akhil, Syed
Mishra, Nimai
In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets
title In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets
title_full In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets
title_fullStr In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets
title_full_unstemmed In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets
title_short In situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets
title_sort in situ synthesis of high-quantum-efficiency and stable bromide-based blue-emitting perovskite nanoplatelets
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9642352/
https://www.ncbi.nlm.nih.gov/pubmed/36381516
http://dx.doi.org/10.1039/d2na00354f
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