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Chen R, Liu M, Wang M, Zhang Y, Shan B, Cao K. Acid-mediated phase transition synthesis of stable nanocrystals for high-power LED backlights. NANOSCALE 2022; 14:13628-13638. [PMID: 36093742 DOI: 10.1039/d2nr03431j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Perovskite nanocrystals (PNCs) have excellent optical and optoelectronic properties, but their intrinsic instability hampers their practical applications. Herein, stable CsPbBr3 nanocrystals (NCs) are fabricated with triethylaluminium (TMA, a Lewis acid) and hydrobromic acid by the co-assisted transformation of Cs4PbBr6 NCs. TMA forms a cross-linked alumina (AlOx) encapsulation layer on the nanocrystal surface to suppress the deformation and ion migration. The introduction of hydrobromic acid acts as a binding ligand, and the acidified reaction environment provides conditions for the water-triggered phase transformation of Cs4PbBr6 NCs into CsPbBr3 NCs. The synergistic effect of TMA and hydrobromic acid improves the stability of CsPbBr3 NCs. The obtained CsPbBr3 NC film maintains a high photoluminescence (PL) intensity after immersion in water. When stored in the atmosphere for over 30 days, the PL intensity of the CsPbBr3 NC film hardly decreases. The proposed acid co-assisted phase transformation strategy provides a new avenue for the stabilization of PNCs which exhibits wider application prospects in backlight displays.
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Affiliation(s)
- Rong Chen
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Hubei 430074, China.
| | - Mengjia Liu
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Hubei 430074, China.
| | - Min Wang
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Hubei 430074, China
| | - Yinghao Zhang
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Hubei 430074, China.
| | - Bin Shan
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Hubei 430074, China
| | - Kun Cao
- State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Hubei 430074, China.
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Al-Qahtani S, Alshareef M, Aljohani M, Alhasani M, Felaly R, Habeebullah TM, El-Metwaly NM. Simple Preparation of Photoluminescent and Color-Tunable Polyester Resin Blended with Alkaline-Earth-Activated Aluminate Nanoparticles. ACS OMEGA 2022; 7:10599-10607. [PMID: 35382282 PMCID: PMC8973151 DOI: 10.1021/acsomega.2c00149] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 03/11/2022] [Indexed: 05/04/2023]
Abstract
A simple inorganic/organic nanocomposite was used to generate long-lasting phosphorescent pebbles for easy commercial manufacturing of smart products. An organic/inorganic nanocomposite was made from low-molecular-weight unsaturated polyester and rare-earth-activated strontium aluminum oxide nanoparticles doped with europium and dysprosium. The polyester resin was mixed with phosphorescent strontium aluminate oxide nanoparticles and methylethyl ketone peroxide as a cross-linking agent to create a viscous mixture that can be hardened in a few minutes at room temperature. Before adding the hardener catalyst, the phosphorescent strontium aluminate nanoparticles were dispersed throughout the polyester resin in a homogeneous manner to ensure that the pigment did not accumulate. Long-lasting, reversible luminescence was shown by the photoluminescent substrates. The emission was reported at 515 nm upon exciting the pebble at 365 nm. In normal visible light, both blank and luminescent pebbles had a translucent appearance. As a result of UV irradiation, the photoluminescent pebbles produced an intense green color. The three-dimensional CIE Lab (International Commission on Illumination) color coordinates and luminescence spectra were used to investigate the color changing characteristics. Photophysical characteristics, including excitation, emission, and lifetime, were also investigated. Scanning electron microscopy, wavelength-dispersive X-ray fluorescence spectroscopy, and energy-dispersive X-ray analysis were employed to report the surface morphologies and elemental content. Without impairing the pebbles' original physico-mechanical characteristics, the pebbles showed improved superhydrophobic activity. The current simple colorless long-lasting phosphorescent nanocomposite can be applied to a variety of surfaces, like ceramics, glassware, tiles, and metals.
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Affiliation(s)
- Salhah
D. Al-Qahtani
- Department
of Chemistry, College of Science, Princess
Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Mubark Alshareef
- Department
of Chemistry, Faculty of Applied Science, Umm Al Qura University, Makkah 21955, Saudi Arabia
| | - Meshari Aljohani
- Department
of Chemistry, College of Science, University
of Tabuk, Tabuk 71491, Saudi Arabia
| | - Mona Alhasani
- Department
of Chemistry, Faculty of Applied Science, Umm Al Qura University, Makkah 21955, Saudi Arabia
| | - Rasha Felaly
- Department
of Chemistry, Faculty of Applied Science, Umm Al Qura University, Makkah 21955, Saudi Arabia
| | - Turki M. Habeebullah
- Department
of Environment and Health Research, Custodian of Two Holy Mosques
Institute for Hajj and Umrah Research, Umm
Al Qura University, Makkah 21955, Saudi Arabia
| | - Nashwa M. El-Metwaly
- Department
of Chemistry, Faculty of Applied Science, Umm Al Qura University, Makkah 21955, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Mansoura
University, El-Gomhoria
Street, Dakahlia 35516, Egypt
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Dolgopolova EA, Li D, Hartman ST, Watt J, Ríos C, Hu J, Kukkadapu R, Casson J, Bose R, Malko AV, Blake AV, Ivanov S, Roslyak O, Piryatinski A, Htoon H, Chen HT, Pilania G, Hollingsworth JA. Strong Purcell enhancement at telecom wavelengths afforded by spinel Fe 3O 4 nanocrystals with size-tunable plasmonic properties. NANOSCALE HORIZONS 2022; 7:267-275. [PMID: 34908075 DOI: 10.1039/d1nh00497b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Developments in the field of nanoplasmonics have the potential to advance applications from information processing and telecommunications to light-based sensing. Traditionally, nanoscale noble metals such as gold and silver have been used to achieve the targeted enhancements in light-matter interactions that result from the presence of localized surface plasmons (LSPs). However, interest has recently shifted to intrinsically doped semiconductor nanocrystals (NCs) for their ability to display LSP resonances (LSPRs) over a much broader spectral range, including the infrared (IR). Among semiconducting plasmonic NCs, spinel metal oxides (sp-MOs) are an emerging class of materials with distinct advantages in accessing the telecommunications bands in the IR and affording useful environmental stability. Here, we report the plasmonic properties of Fe3O4 sp-MO NCs, known previously only for their magnetic functionality, and demonstrate their ability to modify the light-emission properties of telecom-emitting quantum dots (QDs). We establish the synthetic conditions for tuning sp-MO NC size, composition and doping characteristics, resulting in unprecedented tunability of electronic behavior and plasmonic response over 450 nm. In particular, with diameter-dependent variations in free-electron concentration across the Fe3O4 NC series, we introduce a strong NC size dependency onto the optical response. In addition, our observation of plasmonics-enhanced decay rates from telecom-emitting QDs reveals Purcell enhancement factors for simple plasmonic-spacer-emitter sandwich structures up to 51-fold, which are comparable to values achieved previously only for emitters in the visible range coupled with conventional noble metal NCs.
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Affiliation(s)
- Ekaterina A Dolgopolova
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Dongfang Li
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Steven T Hartman
- Materials Science & Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - John Watt
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Carlos Ríos
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742, USA
| | - Juejun Hu
- Department of Materials Science & Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ravi Kukkadapu
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Joanna Casson
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Riya Bose
- Department of Physics, The University of Texas at Dallas, Richardson, TX 75080, USA
| | - Anton V Malko
- Department of Physics, The University of Texas at Dallas, Richardson, TX 75080, USA
| | - Anastasia V Blake
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Sergei Ivanov
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Oleksiy Roslyak
- Department of Physics and Engineering Physics, Fordham University, Bronx, NY 10458, USA
| | - Andrei Piryatinski
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Han Htoon
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Hou-Tong Chen
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Ghanshyam Pilania
- Materials Science & Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Jennifer A Hollingsworth
- Materials Physics and Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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Bose R, Yin J, Zheng Y, Yang C, Gartstein YN, Bakr OM, Malko AV, Mohammed OF. Gentle Materials Need Gentle Fabrication: Encapsulation of Perovskites by Gas-Phase Alumina Deposition. J Phys Chem Lett 2021; 12:2348-2357. [PMID: 33656346 DOI: 10.1021/acs.jpclett.0c03729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Metal halide perovskites have attracted tremendous attention as promising materials for future-generation optoelectronic devices. Despite their outstanding optical and transport properties, the lack of environmental and operational stability remains a major practical challenge. One of the promising stabilization avenues is metal oxide encapsulation via atomic layer deposition (ALD); however, the unavoidable reaction of metal precursors with the perovskite surface in conventional ALD leads to degradation and restructuring of the perovskites' surfaces. This Perspective highlights the development of a modified gas-phase ALD technique for alumina encapsulation that not only prevents perovskites' degradation but also significantly improves their optical properties and air stability. The correlation between precise atomic interactions at the perovskite-metal oxide interface with the dramatically enhanced optical properties is supported by density functional theory calculations, which also underlines the widespread applicability of this gentle technique for a variety of perovskite nanostructures unbarring potential opportunities offered by combination of these approaches.
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Affiliation(s)
- Riya Bose
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Jun Yin
- Advanced Membranes and Porous Materials Center (AMPMC) & KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Yangzi Zheng
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Chen Yang
- Advanced Membranes and Porous Materials Center (AMPMC) & KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Yuri N Gartstein
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Osman M Bakr
- Advanced Membranes and Porous Materials Center (AMPMC) & KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Anton V Malko
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Omar F Mohammed
- Advanced Membranes and Porous Materials Center (AMPMC) & KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
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