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Locardi F, Samoli M, Martinelli A, Erdem O, Magalhaes DV, Bals S, Hens Z. Cyan Emission in Two-Dimensional Colloidal Cs 2CdCl 4:Sb 3+ Ruddlesden-Popper Phase Nanoplatelets. ACS Nano 2021; 15:17729-17737. [PMID: 34668701 PMCID: PMC8613908 DOI: 10.1021/acsnano.1c05684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Metal halide perovskites are one of the most investigated materials in optoelectronics, with their lead-based counterparts being renowned for their enhanced optoelectronic performance. The 3D CsPbX3 structure has set the standard with many studies currently attempting to substitute lead with other metals while retaining the properties of this material. This effort has led to the fabrication of metal halides with lower dimensionality, wherein particular 2D layered perovskite structures have captured attention as inspiration for the next generation of colloidal semiconductors. Here we report the synthesis of the Ruddlesden-Popper Cs2CdCl4:Sb3+ phase as colloidal nanoplatelets (NPs) using a facile hot injection approach under atmospheric conditions. Through strict adjustment of the synthesis parameters with emphasis on the ligand ratio, we obtained NPs with a relatively uniform size and good morphological control. The particles were characterized through transmission electron microscopy, synchrotron X-ray diffraction, and pair distribution function analysis. The spectroscopic characterization revealed most strikingly an intense cyan emission under UV excitation with a measured PLQY of ∼20%. The emission was attributed to the Sb3+-doping within the structure.
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Affiliation(s)
- Federico Locardi
- Department
of Chemistry and Industrial Chemistry, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
| | - Margarita Samoli
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
| | | | - Onur Erdem
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
| | - Debora Vale Magalhaes
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Sara Bals
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Zeger Hens
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
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Chee SS, Gréboval C, Magalhaes DV, Ramade J, Chu A, Qu J, Rastogi P, Khalili A, Dang TH, Dabard C, Prado Y, Patriarche G, Chaste J, Rosticher M, Bals S, Delerue C, Lhuillier E. Correlating Structure and Detection Properties in HgTe Nanocrystal Films. Nano Lett 2021; 21:4145-4151. [PMID: 33956449 DOI: 10.1021/acs.nanolett.0c04346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
HgTe nanocrystals (NCs) enable broadly tunable infrared absorption, now commonly used to design light sensors. This material tends to grow under multipodic shapes and does not present well-defined size distributions. Such point generates traps and reduces the particle packing, leading to a reduced mobility. It is thus highly desirable to comprehensively explore the effect of the shape on their performance. Here, we show, using a combination of electron tomography and tight binding simulations, that the charge dissociation is strong within HgTe NCs, but poorly shape dependent. Then, we design a dual-gate field-effect-transistor made of tripod HgTe NCs and use it to generate a planar p-n junction, offering more tunability than its vertical geometry counterpart. Interestingly, the performance of the tripods is higher than sphere ones, and this can be correlated with a stronger Te excess in the case of sphere shapes which is responsible for a higher hole trap density.
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Affiliation(s)
- Sang-Soo Chee
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
- Nanomaterials and Nanotechnology Center, Korea Institute of Ceramic Engineering and Technology (KICET), 101 Soho-ro, 52851 Jinju-si, Republic of Korea
| | - Charlie Gréboval
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
| | - Debora Vale Magalhaes
- Electron Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, B-2020 Antwerp, Belgium
| | - Julien Ramade
- Electron Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, B-2020 Antwerp, Belgium
| | - Audrey Chu
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
| | - Junling Qu
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
| | - Prachi Rastogi
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
| | - Adrien Khalili
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
| | - Tung Huu Dang
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
- Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité, 75005 Paris, France
| | - Corentin Dabard
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
| | - Yoann Prado
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
| | - Gilles Patriarche
- Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, C2N, Palaiseau 2110, France
| | - Julien Chaste
- Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, C2N, Palaiseau 2110, France
| | - Michael Rosticher
- Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité, 75005 Paris, France
| | - Sara Bals
- Electron Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, B-2020 Antwerp, Belgium
| | - Christophe Delerue
- Université Lille, CNRS, Centrale Lille, Université Polytechnique Hauts-de-France, Junia, UMR 8520 - IEMN F-59000 Lille, France
| | - Emmanuel Lhuillier
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place Jussieu, 75005 Paris, France
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