Optimization of processing parameters for designing an efficient AC driven powder electroluminescent device

Singh, Paramjeet; Rajesh, B.; Bishnoi, Swati; Swati, G.; Jaiswal, Vishnu V.; Shanker, Virendra; Haranath, D.

doi:10.1016/j.ceramint.2016.07.209

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…Unlike most of other common light-emitting devices, here, the brightness response of tested prototypes shows “wavy” response patterns with the rise of driving voltage. This response is much similar to what Singh and co-workers have presented in their work, where it was attributed to the presence of Cu with other impurities within the host matrix. The presence of impurities results in multiple shallow traps during impact excitation step, eventually resulting a “wavy” brightness response pattern with voltage.…”

Section: Resultssupporting

confidence: 89%

“…Unlike most of other common light-emitting devices, here, the brightness response of tested prototypes shows "wavy" response patterns with the rise of driving voltage. This response is much similar to what Singh and co-workers 25 have presented in their work, where it was attributed to the presence of Cu with other impurities within the host matrix.…”

Section: ■ Results and Discussionsupporting

confidence: 88%

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Facile and Scalable Electrospun Nanofiber-Based Alternative Current Electroluminescence (ACEL) Device

Jayathilaka

Chinnappan

et al. 2020

ACS Appl. Electron. Mater.

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Alternative current electroluminescence (ACEL) can be identified as an efficient light-emitting technique among a number of different light emission methods. Open-air fabrication capability of the ACEL technique outshines among a few other advantages, whereas electrospinning has been widely identified as a simple, open-air fabrication for nanosized fibers. Here, the authors have combined these two techniques together and fabricated an ACEL device with electrospinning for the first time. The role of electrospinning is highlighted as a scalable fabrication technique to achieve uniform dispersion of both phosphor (ZnS:Cu) and dielectric (BaTiO3) particles. With a greenish-blue luminescence (peak wavelength, 484 nm), the proposed device has achieved a maximum brightness value of 88.55 cd/m2 and a maximum current efficiency of 7.4 cd/A with only 1 kHz sinusoidal input signal. The uniformity of nanofiber mats was evaluated with SEM and EDS analyses, TEM was used as a corroboration. The crystal structures of the active materials were confirmed with X-ray diffraction (XRD) analysis as well. With the opportunities available in both electrospinning and optoelectronic field, this can initiate newer prospects including but not limited to backlighting and smooth light emitting panels in display technology, surface emitting devices in large-area luminescence applications, e.g., in advertising or architectural aspects, and even phototherapeutic applications as well.

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Section: Resultssupporting

confidence: 89%

Section: ■ Results and Discussionsupporting

confidence: 88%

Facile and Scalable Electrospun Nanofiber-Based Alternative Current Electroluminescence (ACEL) Device

Jayathilaka

Chinnappan

et al. 2020

ACS Appl. Electron. Mater.

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“…Before and after the hail simulation, PV modules were photographed (using an electroluminescence camera) on the electroluminescent stand with an electric current (the current depended on the size of the PV modules; it can reach up to 4-5 A) supplied to the PV modules. Electroluminescent imaging is usually used to check for defects [54][55][56] because the intensity of radiation is proportional to the current density. The pictures taken helped detect any defects in the PV modules.…”

Section: Hail Simulation Testbed and Equipment For Measuring Dynamic Parametersmentioning

confidence: 99%

Research of the Energy Losses of Photovoltaic (PV) Modules after Hail Simulation Using a Newly-Created Testbed

et al. 2019

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The impact of hail ice cubes on composite structures (such as solar cells) causes actual defects. This article presents a series of tests, in which solar cell modules were exposed to hail simulation testbed balls, allowing to assess the following: the impact energy, which causes the major defects in solar cells; the formed micro-cracks in the structure of solar cells, resulting in the loss of power generated by a solar cell; and the solar cell parameters necessary for modelling. In addition, this article presents a digital analysis of hail simulation. Information received from the digital analysis was used to optimize the structure of solar cells in order to improve its resistance properties. The aim of this study was to present a simple method for experimental hail simulation. The proposed hail impact estimation method can be successfully applied to study the influence of the mechanical–dynamic impact of photovoltaic (PV) modules of different structures on the technical characteristics of these modules (structural stability, power generation, etc.). The study showed that PV modules are subjected to an irreversible effect of the excitation force (i.e., micro-cracking) and it can reduce the generated power by 2.33% to 4.83%.

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“…However, considering the high voltage required to achieve high electroluminescence intensity, the practical engineering application of electroluminescent devices is limited, and problems such as energy waste will arise [20][21][22]. Improving the electroluminescence intensity of luminescent layer composites is the key to enhance the performance of electroluminescent devices [23][24][25]. Jun S Y [26] et al introduced short carbon nanotubes treated with chlorobenzene to improve the luminance of devices.…”

Section: Introductionmentioning

confidence: 99%

Optimising the electroluminescence performance of ZnS: Cu/epoxy composites via exploring the relationship between electroluminescence intensity and filler intrinsic attributes

Liu

Chen

et al. 2022

High Voltage

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Electroluminescent composites have considerable potential for applications in photoelectric display, electric field measurement and other fields due to their advantages of simple preparation and uniform luminescence. However, high voltage required by the operation of electroluminescent composites hinders their applications in the electric domain, and research on the relationship between electroluminescence principle of composites and filler intrinsic attributes is insufficient. In this paper, the effects of electric field strength, filler mass fraction and voltage frequency on the electroluminescence intensity of ZnS: Cu/epoxy composites are studied, which are majorly used as the luminescent layer of electroluminescent devices. To enhance the electroluminescence intensity of composites, high-temperature sintered BaTiO 3 and zinc oxide whiskers (ZnOw) particles are introduced in the base matrix. The finite element method is applied to verify that the matrix of high dielectric constant is in favour of improving the electroluminescence intensity of composites. The band structure of the ZnS: Cu particle is calculated based on the density functional theory + U method to analyse the intrinsic relationship between electroluminescence and particle electronic structure. This paper provides a basis for the research of high electroluminescence intensity devices and will be conducive to better understanding on the relationship between electroluminescence principle and filler intrinsic attributes.

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Optimization of processing parameters for designing an efficient AC driven powder electroluminescent device

Cited by 8 publications

References 17 publications

Facile and Scalable Electrospun Nanofiber-Based Alternative Current Electroluminescence (ACEL) Device

Facile and Scalable Electrospun Nanofiber-Based Alternative Current Electroluminescence (ACEL) Device

Research of the Energy Losses of Photovoltaic (PV) Modules after Hail Simulation Using a Newly-Created Testbed

Optimising the electroluminescence performance of ZnS: Cu/epoxy composites via exploring the relationship between electroluminescence intensity and filler intrinsic attributes

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