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Das Adhikari S, Gualdrón Reyes AF, Paul S, Torres J, Escuder B, Mora-Seró I, Masi S. Impact of core-shell perovskite nanocrystals for LED applications: successes, challenges, and prospects. Chem Sci 2023; 14:8984-8999. [PMID: 37655016 PMCID: PMC10466310 DOI: 10.1039/d3sc02955g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/13/2023] [Indexed: 09/02/2023] Open
Abstract
Perovskite nanocrystals (PeNCs) synthesized by colloidal solution methods are an outstanding case of study due to their remarkable optical features, different from their bulk counterpart, such as a tuneable band gap and narrower photoluminescence emission, altered by the size and shape. However, the stability of these systems needs to be improved to consolidate their application in optoelectronic devices. Improved PeNC quality is associated with a less defective structure, as it affects negatively the photoluminescence quantum yield (PLQY), due to the essential, but at the same time labile interaction between the colloidal capping ligands and the perovskite core. In this sense, it would be extremely effective to obtain an alternative method to stabilize the PeNC phases and passivate the surface, in order to improve both stability and optical properties. This objective can be reached exploiting the structural benefits of the interaction between the perovskite and other organic or inorganic materials with a compatible structure and optical properties and limiting the optical drawbacks. This perspective contemplates different combinations of core/shell PeNCs and the critical steps during the synthesis, including drawbacks and challenges based on their optical properties. Additionally, it provides insights for future light emitting diode (LED) applications and advanced characterization. Finally, the existing challenges and opportunities for core/shell PeNCs are discussed.
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Affiliation(s)
- Samrat Das Adhikari
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI) Avenida de Vicent Sos Baynat, s/n Castelló 12071 Spain
| | - Andrés F Gualdrón Reyes
- Facultad de Ciencias, Instituto de Ciencias Químicas, Isla Teja Universidad Austral de Chile Valdivia 5090000 Chile
| | - Subir Paul
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI) Avenida de Vicent Sos Baynat, s/n Castelló 12071 Spain
| | - Jeevan Torres
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI) Avenida de Vicent Sos Baynat, s/n Castelló 12071 Spain
| | - Beatriu Escuder
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI) Avenida de Vicent Sos Baynat, s/n Castelló 12071 Spain
| | - Iván Mora-Seró
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI) Avenida de Vicent Sos Baynat, s/n Castelló 12071 Spain
| | - Sofia Masi
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI) Avenida de Vicent Sos Baynat, s/n Castelló 12071 Spain
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Serafini P, Villanueva-Antolí A, Adhikari SD, Masi S, Sánchez RS, Rodriguez-Pereira J, Pradhan B, Hofkens J, Gualdrón-Reyes AF, Mora-Seró I. Increasing the Performance and Stability of Red-Light-Emitting Diodes Using Guanidinium Mixed-Cation Perovskite Nanocrystals. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:3998-4006. [PMID: 37251100 PMCID: PMC10210241 DOI: 10.1021/acs.chemmater.3c00269] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/21/2023] [Indexed: 05/31/2023]
Abstract
Halide perovskite nanocrystals (PNCs) exhibit growing attention in optoelectronics due to their fascinating color purity and improved intrinsic properties. However, structural defects emerging in PNCs progressively hinder the radiative recombination and carrier transfer dynamics, limiting the performance of light-emitting devices. In this work, we explored the introduction of guanidinium (GA+) during the synthesis of high-quality Cs1-xGAxPbI3 PNCs as a promising approach for the fabrication of efficient bright-red light-emitting diodes (R-LEDs). The substitution of Cs by 10 mol % GA allows the preparation of mixed-cation PNCs with PLQY up to 100% and long-term stability for 180 days, stored under air atmosphere and refrigerated condition (4 °C). Here, GA+ cations fill/replace Cs+ positions into the PNCs, compensating intrinsic defect sites and suppressing the nonradiative recombination pathway. LEDs fabricated with this optimum material show an external quantum efficiency (EQE) near to 19%, at an operational voltage of 5 V (50-100 cd/m2) and an operational half-time (t50) increased 67% respect CsPbI3 R-LEDs. Our findings show the possibility to compensate the deficiency through A-site cation addition during the material synthesis, obtaining less defective PNCs for efficient and stable optoelectronic devices.
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Affiliation(s)
- Patricio Serafini
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, s/n, Castelló
de la Plana, Castellón 12071, Spain
| | - Alexis Villanueva-Antolí
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, s/n, Castelló
de la Plana, Castellón 12071, Spain
| | - Samrat Das Adhikari
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, s/n, Castelló
de la Plana, Castellón 12071, Spain
| | - Sofia Masi
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, s/n, Castelló
de la Plana, Castellón 12071, Spain
| | - Rafael S. Sánchez
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, s/n, Castelló
de la Plana, Castellón 12071, Spain
| | - Jhonatan Rodriguez-Pereira
- Center
of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice, 53002 Pardubice, Czech Republic
- Central
European Institute of Technology, Brno University
of Technology, 612 00 Brno, Czech Republic
| | - Bapi Pradhan
- Laboratory
for Photochemistry and Spectroscopy,
Molecular Imaging and Photonics, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F − bus
2404, B-3001 Heverlee, Belgium
| | - Johan Hofkens
- Laboratory
for Photochemistry and Spectroscopy,
Molecular Imaging and Photonics, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F − bus
2404, B-3001 Heverlee, Belgium
| | - Andrés F. Gualdrón-Reyes
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, s/n, Castelló
de la Plana, Castellón 12071, Spain
- Facultad
de Ciencias, Instituto de Ciencias Químicas, Isla Teja, Universidad Austral de Chile, 5090000 Valdivia, Chile
| | - Iván Mora-Seró
- Institute
of Advanced Materials (INAM), Universitat
Jaume I, Avenida de Vicent Sos Baynat, s/n, Castelló
de la Plana, Castellón 12071, Spain
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