Defect energy levels and persistent luminescence in Cu-doped ZnS

Hoang, Khang; Latouche, Camille; Jobic, Stéphane

doi:10.1016/j.commatsci.2019.03.016

Cited by 27 publications

(11 citation statements)

References 24 publications

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“…Figure 6a shows the UV-vis absorption spectrum of the MAPb(Br0.1I0.9)3 film on the PET substrate and the ML emission of ZnS:Cu. The optical band gap (Eg) of the MAPb(Br0.1I0.9)3 perovskite is 1.64 eV, calculated from the Tauc plot, which is lower than the ML light emission Eg from ZnS:Cu (2.28 eV) [40]. Consequently, the ML emissions from ZnS:Cu can be fully absorbed by the perovskite material.…”

Section: Device Characterization and Embedmentmentioning

confidence: 91%

Performance Analysis of Embedded Mechanoluminescence-Perovskite Self-Powered Pressure Sensor for Structural Health Monitoring

et al. 2020

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Recent developments in sensing technologies have triggered a lot of research interest in exploring novel self-powered, inexpensive, compact and flexible pressure sensors with the potential for structural health monitoring (SHM) applications. Herein, we assessed the performance of an embedded mechanoluminescent (ML) and perovskite pressure sensor that integrates the physical principles of mechanoluminescence and perovskite materials. For a continuous in-situ SHM, it is crucial to evaluate the capabilities of the sensing device when embedded into a composite structure. An experimental study of how the sensor is affected by the embedment process into a glass fiber-reinforced composite has been conducted. A series of devices with and without ML were embedded within a composite laminate, and the signal responses were collected under different conditions. We also demonstrated a successful encapsulation process in order for the device to withstand the composite manufacturing conditions. The results show that the sensor exhibits distinct signals when subjected to different load conditions and can be used for the in-situ SHM of advanced composite structures.

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Section: Device Characterization and Embedmentmentioning

confidence: 91%

Performance Analysis of Embedded Mechanoluminescence-Perovskite Self-Powered Pressure Sensor for Structural Health Monitoring

et al. 2020

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“…[331,332] Density functional theory (DFT) calculations may be a powerful tool to give a preliminary prediction of some critical information, such as the types of traps, energy levels of traps, and optical properties, screening some improper combinations in advance, helping to select proper host and activators/codopants combinations, and greatly improve the efficiency and accuracy. [333][334][335][336][337][338][339] The second challenge is the preparation of uniformly distributed nanoparticles. For the application using OSL materials in some advanced fields, such as optical data storage, anticounterfeiting, and radiation dosimetry, the particle with nanosize, regular micromorphology, and uniform distribution is critical for high capacity storage.…”

Section: Challenges and Outlooksmentioning

confidence: 99%

Section: Challenges and Outlooksmentioning

confidence: 99%

Optically Stimulated Luminescence Phosphors: Principles, Applications, and Prospects

Yuan

Jin

et al. 2020

Laser & Photonics Reviews

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Optically stimulated luminescence (OSL) materials, enabling energy storage by capturing of charge carriers and then the energy conversion to light via photostimulation, can find many advanced applications in various fields, spanning from radiation dosimetry, optical data storage and security, environmental monitoring, biomedicine, clinical diagnostic, to archaeology and geology. At present, there are some blocks, including the development of nanocrystallization approaches, the tailoring of optical transitions, the control of trap distribution, and the understanding of OSL mechanisms, on the road to the exploration of OSL materials. This review gives an overview of the design, preparation, characterization, optimization, application, mechanism, and prospect of OSL materials. A short introduction of the fundamental principle and history of OSL materials is presented, followed by a summary of preparation and design methods, and a survey of OSL materials reported to date. The trap engineering, mechanism, and study methodologies of OSL are summarized, after which the widespread applications of OSL materials, in traditional and newly emerging fields, are reviewed. Finally, the merits and drawbacks of the OSL materials according to the relevant reports currently available are examined. The challenges and outlooks are highlighted and discussed in terms of five important aspects that merit future research.

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“…In addition, Liu et al [33] doped α-Fe 2 O 3 with Pt 2+ and created Schottky barriers, which could effectively hinder the recombination of photogenerated electrons and holes, thereby increasing their lifetime. To date, doping of semiconductors with transition metals has been regarded as a potential strategy to improve their photocatalytic efficiency through the following mechanisms: (1) modification of the local electronic environments [34][35][36], (2) improvement in the separation efficiency of charge carriers [37][38][39], and (3) creation of new active centers [40,41]. Despite these advantages, excessive doping can decrease photocatalytic performance because of the formation of charge recombination centers [37].…”

Section: Introductionmentioning

confidence: 99%

“…To date, doping of semiconductors with transition metals has been regarded as a potential strategy to improve their photocatalytic efficiency through the following mechanisms: (1) modification of the local electronic environments [34][35][36], (2) improvement in the separation efficiency of charge carriers [37][38][39], and (3) creation of new active centers [40,41]. Despite these advantages, excessive doping can decrease photocatalytic performance because of the formation of charge recombination centers [37]. In addition, the introduction of heteroatoms as dopants will inevitably reduce the apparent band gap of the catalyst and reduce its redox ability [35].…”

Section: Introductionmentioning

confidence: 99%

Creation of Mo active sites on indium oxide microrods for photocatalytic amino acid production

Zheng

et al. 2021

Sci. China Mater.

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As an n-type semiconductor, In 2 O 3 is considered a promising photocatalyst for producing amino acids using biomass derivatives as precursors. However, similar to other intrinsic semiconductors, In 2 O 3 suffers from poor charge dynamics. Herein, we show the synthesis of Mo-doped In 2 O 3 (Mo-In 2 O 3 ) with a porous rod-shaped structure through a onestep solvothermal reaction followed by calcination. Under visible-light irradiation, Mo-In 2 O 3 achieves a high conversion rate of 81% for the reaction that transforms lactic acid into alanine with a selectivity of 91%. Spectroscopic techniques and density functional theory calculations reveal that Mo doping introduces defect states slightly below the conduction band of In 2 O 3 , which improves the separation of photogenerated electron-hole pairs. In addition, Mo atoms on the surface form extra adsorption and reaction centers that greatly enhance the reaction rate. This work provides insights into the development of transition metal-doped semiconductor photocatalysts to produce amino acids.

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Defect energy levels and persistent luminescence in Cu-doped ZnS

Cited by 27 publications

References 24 publications

Performance Analysis of Embedded Mechanoluminescence-Perovskite Self-Powered Pressure Sensor for Structural Health Monitoring

Performance Analysis of Embedded Mechanoluminescence-Perovskite Self-Powered Pressure Sensor for Structural Health Monitoring

Optically Stimulated Luminescence Phosphors: Principles, Applications, and Prospects

Creation of Mo active sites on indium oxide microrods for photocatalytic amino acid production

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