Persistent luminescence of transparent ZnGa2O4:Cr3+ thin films from colloidal nanoparticles of tunable size

Arroyo, Encarnación; Medrán, Beatriz; Castaing, Victor; Lozano, Gabriel; Ocaña, Manuel; Becerro, Ana Isabel

doi:10.1039/d1tc00258a

Cited by 22 publications

(21 citation statements)

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“…Mn-activated spinel AB 2 O 4 phosphors have been extensively studied experimentally due to their unique crystal structure of [AO 4 ] tetrahedra and [BO 6 ] octahedra, such as MgAl 2 O 4 /Mn, − ZnAl 2 O 4 /Mn, and MgGa 2 O 4 /Mn . Recently, the multiple manganese oxidation states of +2, +3, and +4 are all observed in experiments, and the corresponding luminescence has been studied in the Mn-activated ZnGa 2 O 4 host. − Spinel ZnGa 2 O 4 has received much attention due to its excellent persistent luminescence , and its promising photocatalyst characteristics for water splitting, organic pollutant degradation, and CO 2 reduction . In our work, Mn-activated ZnGa 2 O 4 is selected as a prototype system to systematically study the characteristics of multiple valence and site occupancy nature of manganese ions and its impact on the local structure and photoluminescence properties.…”

Section: Introductionmentioning

confidence: 99%

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa₂O₄: A First-Principles Study

Chen

Shang

et al. 2021

J. Phys. Chem. C

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The transition metal manganese is attractive for magnetism and luminescence engineering due to the nontrivial interplay of charge, spin, lattice, and orbital freedom degrees. Here, we report the manganese site occupancy and valence states by taking experimental synthesis conditions into consideration and the optical features of target intra-atomic Mn2+, Mn3+, and Mn4+ in the framework of density functional theory in a prototype spinel ZnGa2O4 host. The formation energy results show that Mn2+ dominates in tetrahedral ligands at the Zn2+ site and Mn3+ and Mn4+ dominate in octahedral ligands at the Ga3+ site under the corresponding different chemical potential conditions, and the distortion of the local coordination environment of Mn3+ in octahedral ligands due to the Jahn–Teller effect is studied in detail. The excited-state equilibrium geometries and energies are obtained via spin or orbital occupancy constraints, which are further complemented by the Tanabe–Sugano diagram to predict the energy spectra and to interpret the experimental results on Mn2+, Mn4+, and Mn3+. In particular, the competition of 5T2 and 1T2 excited states and the relaxation processes leading to near-infrared luminescence of rarely reported Mn3+ are analyzed. First-principles calculations complemented by the Tanabe–Sugano diagram analysis may serve as an effective and predictive tool for exploring valence states, energy structures, and luminescence of complexes containing 3d n transition-metal ions.

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Section: Introductionmentioning

confidence: 99%

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa₂O₄: A First-Principles Study

Chen

Shang

et al. 2021

J. Phys. Chem. C

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“…4d). According to the empirical formula demonstrated by Urbach: 46,47 E = T m /500where E is the trap depth and T m is the temperature showing maximum TL intensity; the depth of the traps is calculated to be ∼0.76 eV, signifying that the traps are located at ∼0.76 eV underneath the conduction band minimum (CBM). Although the trap-depth in the two samples is approximately the same, the TL intensity of ZGO:0.001Mn is much higher than that of ZGO:0.003Mn (Fig.…”

Section: Resultsmentioning

confidence: 99%

Compensation effect of electron traps for enhanced fluorescence intensity ratio thermometry performance

Zuo

Jiang

Zhang

et al. 2022

Inorg. Chem. Front.

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“…In addition, the stability increases the lifetime of the final product as compared to the polymer hybrid composites. The development of transparent films with a controllable photon release is of a great interest for anti-counterfeiting technology and energy storage applications from the VUV to NIR range [ 58 ]. In addition, the technology can be applied for not persistent materials, as well.…”

Section: Perspectives and Applicationsmentioning

confidence: 99%

Aluminate-Based Nanostructured Luminescent Materials: Design of Processing and Functional Properties

et al. 2021

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Interest in luminescent materials has been continuously growing for several decades, looking for the development of new systems with optimized optical properties. Nowadays, research has been focused on the development of materials that satisfy specific market requirements in optoelectronics, radioelectronics, aerospace, bio-sensing, pigment applications, etc. Despite the fact that several efforts have made in the synthesis of organic luminescent materials, their poor stability under light exposure limits their use. Hence, luminescent materials based on inorganic phosphors are considered a mature topic. Within this subject, glass, glass-ceramics and ceramics have had great technological relevance, depending on the final applications. Supposing that luminescent materials are able to withstand high temperatures, have a high strength and, simultaneously, possess high stability, ceramics may be considered promising candidates to demonstrate required performance. In an ongoing effort to find a suitable synthesis method for their processing, some routes to develop nanostructured luminescent materials are addressed in this review paper. Several ceramic families that show luminescence have been intensively studied in the last few decades. Here, we demonstrate the synthesis of particles based on aluminate using the methods of sol-gel or molten salts and the production of thin films using screen printing assisted by a molten salt flux. The goal of this review is to identify potential methods to tailor the micro-nanostructure and to tune both the emission and excitation properties, focusing on emerging strategies that can be easily transferred to an industrial scale. Major challenges, opportunities, and directions of future research are specified.

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Persistent luminescence of transparent ZnGa₂O₄:Cr³⁺ thin films from colloidal nanoparticles of tunable size

Abstract: We report on the fabrication of ZnGa2O4:Cr3+ transparent thin films and the evaluation, for the first time in literature, of their persistent red to NIR emission. For this purpose, we...

Cited by 22 publications

References 54 publications

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa₂O₄: A First-Principles Study

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa₂O₄: A First-Principles Study

Compensation effect of electron traps for enhanced fluorescence intensity ratio thermometry performance

Aluminate-Based Nanostructured Luminescent Materials: Design of Processing and Functional Properties

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Persistent luminescence of transparent ZnGa2O4:Cr3+ thin films from colloidal nanoparticles of tunable size

Abstract: We report on the fabrication of ZnGa2O4:Cr3+ transparent thin films and the evaluation, for the first time in literature, of their persistent red to NIR emission. For this purpose, we...

Cited by 22 publications

References 54 publications

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa2O4: A First-Principles Study

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa2O4: A First-Principles Study

Compensation effect of electron traps for enhanced fluorescence intensity ratio thermometry performance

Aluminate-Based Nanostructured Luminescent Materials: Design of Processing and Functional Properties

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Product

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Persistent luminescence of transparent ZnGa₂O₄:Cr³⁺ thin films from colloidal nanoparticles of tunable size

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa₂O₄: A First-Principles Study

Multiple-Valence and Visible to Near-Infrared Photoluminescence of Manganese in ZnGa₂O₄: A First-Principles Study