Moisture-Assisted near-UV Emission Enhancement of Lead-Free Cs4CuIn2Cl12 Double Perovskite Nanocrystals
(2022) In Nano Letters 22(1). p.311-318- Abstract
Lead-based halide perovskite nanocrystals (NCs) are recognized as emerging emissive materials with superior photoluminescence (PL) properties. However, the toxicity of lead and the swift chemical decomposition under atmospheric moisture severely hinder their commercialization process. Herein, we report the first colloidal synthesis of lead-free Cs4CuIn2Cl12 layered double perovskite NCs via a facile moisture-assisted hot-injection method stemming from relatively nontoxic precursors. Although moisture is typically detrimental to NC synthesis, we demonstrate that the presence of water molecules in Cs4CuIn2Cl12 synthesis enhances the PL quantum yield (mainly in the near-UV... (More)
Lead-based halide perovskite nanocrystals (NCs) are recognized as emerging emissive materials with superior photoluminescence (PL) properties. However, the toxicity of lead and the swift chemical decomposition under atmospheric moisture severely hinder their commercialization process. Herein, we report the first colloidal synthesis of lead-free Cs4CuIn2Cl12 layered double perovskite NCs via a facile moisture-assisted hot-injection method stemming from relatively nontoxic precursors. Although moisture is typically detrimental to NC synthesis, we demonstrate that the presence of water molecules in Cs4CuIn2Cl12 synthesis enhances the PL quantum yield (mainly in the near-UV range), induces a morphological transformation from 3D nanocubes to 2D nanoplatelets, and converts the dark transitions to radiative transitions for the observed self-trapped exciton relaxation. This work paves the way for further studies on the moisture-assisted synthesis of novel lead-free halide perovskite NCs for a wide range of applications.
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- author
- Liu, Maning LU ; Matta, Sri Kasi ; Ali-Löytty, Harri ; Matuhina, Anastasia ; Grandhi, G. Krishnamurthy ; Lahtonen, Kimmo ; Russo, Salvy P. and Vivo, Paola
- publishing date
- 2022-01-12
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- 2D nanoplatelets, lead-free double perovskite nanocrystals, moisture-assisted, near-UV emission, self-trapped excitons
- in
- Nano Letters
- volume
- 22
- issue
- 1
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:34939808
- scopus:85122593035
- ISSN
- 1530-6984
- DOI
- 10.1021/acs.nanolett.1c03822
- language
- English
- LU publication?
- no
- id
- 7cdbdd9a-6e55-434f-a2fa-49d5e56c3db8
- date added to LUP
- 2023-08-24 12:19:40
- date last changed
- 2024-10-05 18:35:29
@article{7cdbdd9a-6e55-434f-a2fa-49d5e56c3db8, abstract = {{<p>Lead-based halide perovskite nanocrystals (NCs) are recognized as emerging emissive materials with superior photoluminescence (PL) properties. However, the toxicity of lead and the swift chemical decomposition under atmospheric moisture severely hinder their commercialization process. Herein, we report the first colloidal synthesis of lead-free Cs<sub>4</sub>CuIn<sub>2</sub>Cl<sub>12</sub> layered double perovskite NCs via a facile moisture-assisted hot-injection method stemming from relatively nontoxic precursors. Although moisture is typically detrimental to NC synthesis, we demonstrate that the presence of water molecules in Cs<sub>4</sub>CuIn<sub>2</sub>Cl<sub>12</sub> synthesis enhances the PL quantum yield (mainly in the near-UV range), induces a morphological transformation from 3D nanocubes to 2D nanoplatelets, and converts the dark transitions to radiative transitions for the observed self-trapped exciton relaxation. This work paves the way for further studies on the moisture-assisted synthesis of novel lead-free halide perovskite NCs for a wide range of applications.</p>}}, author = {{Liu, Maning and Matta, Sri Kasi and Ali-Löytty, Harri and Matuhina, Anastasia and Grandhi, G. Krishnamurthy and Lahtonen, Kimmo and Russo, Salvy P. and Vivo, Paola}}, issn = {{1530-6984}}, keywords = {{2D nanoplatelets; lead-free double perovskite nanocrystals; moisture-assisted; near-UV emission; self-trapped excitons}}, language = {{eng}}, month = {{01}}, number = {{1}}, pages = {{311--318}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Nano Letters}}, title = {{Moisture-Assisted near-UV Emission Enhancement of Lead-Free Cs<sub>4</sub>CuIn<sub>2</sub>Cl<sub>12</sub> Double Perovskite Nanocrystals}}, url = {{http://dx.doi.org/10.1021/acs.nanolett.1c03822}}, doi = {{10.1021/acs.nanolett.1c03822}}, volume = {{22}}, year = {{2022}}, }