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Aldes Lesbani
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Pusat Riset Material Anorganik dan Senyawa Kompleks, Prodi Magister Ilmu Material Universitas Sriwijaya, Jl. Padang Selasa No 524 Bukit Besar Palembang Sumatera Selatan, 30139.
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INDONESIA
Indonesian Journal of Material Research
Published by Universitas Sriwijaya
ISSN : 29871654     EISSN : 29871654     DOI : https://doi.org/10.26554/ijmr.xxx
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering
The scope of IJMR encompasses a diverse array of research areas, including but not limited to Nanomaterials and nanotechnology Biomaterials and biocompatibility Polymers, composites, and hybrid materials, Electronic, optical, and magnetic material Advanced ceramics and glasses, Metals and alloys Functional materials and smart materials, Surface engineering and coatings, Materials characterization, testing, and simulation Materials for energy storage, conversion, and harvesting, Environmental and sustainable materials Advanced manufacturing processes and materials engineering
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 2 Documents
 1 
Search results for , issue "Vol. 4 No. 2 (2026): Future Issue : July" : 2 Documents clear
Non-Proximity as Well as Immediate Tracking for Phosphor Heat Within Phosphor-Transmuted WLED Apparatuses Nguyen Thi Phuong Loan; Phan Xuan Le; Phan Thi Minh Man
Indonesian Journal of Material Research Vol. 4 No. 2 (2026): Future Issue : July
Publisher : Magister Program of Material Science Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijmr.20264280

Abstract

Phosphor-transmuted white illuminating diode units (ptWLEDs) prove to be an essential illumination means for universal illumination. For balancing the photometrical attributes for ptWLED apparatuses, significant endeavors are still aiming at regulating the thermic abatement for LED colorants. The thermic issues for phosphor components, being a profound dependability trouble in ptWLED apparatuses, continue to be a significant subject for research. The study herein concerns a reliable method capable of assessing phosphor heat within functioning ptWLED via a non-proximity, immediate tracking technique for distantly tracking the discharge spectrum. Usually, infrared cameras or thermocouples would be employed for assessing heat. IR cameras need decent calibrating for discharge and would be typically obstructed via lenses or disparate modules covering phosphor samples. Furthermore, thermocouples need a period for achieving thermic anology among the tracker as well as samples subject to experiment. Said method would be detrimental if employed in intrinsic tracking. The method herein offers benefits surpassing ordinary techniques for non-intrusiveness, non-proximity, immediate as well as intrinsic tracking. Said technique would not be influenced by apex wavelength for pump illumination, the dosage as well as breadth for phosphors as well as correlated chroma heat (CCT).
Effect from Fluorization Upon Formation as Well as Luminescence for ZrO₂:Eu Nanogranules Loan, Nguyen Thi Phuong
Indonesian Journal of Material Research Vol. 4 No. 2 (2026): Future Issue : July
Publisher : Magister Program of Material Science Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijmr.20264282

Abstract

ZrO2:Eu phosphor materials were synthesized using a solid-state reaction method in order to investigate their structural and luminescent properties. The obtained powder samples were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) spectroscopy. XRD patterns of all Eu-doped samples reveal the coexistence of monoclinic and cubic phases of ZrO2, indicating that phase transformation occurs during the high-temperature solid-state synthesis process. The results further suggest that the samples undergo crystallization in a dense solid form. SEM observations confirm the formation of aggregated crystalline particles with relatively uniform morphology. At room temperature, the PL spectra of all investigated samples exhibit a broad emission band attributed to host-related luminescence, along with distinct sharp emission peaks corresponding to the characteristic radiative transitions of Eu3+ ions under optical excitation. Notably, the overall luminescence intensity of Eu3+ increases by at least six times with increasing fluorine content, demonstrating the strong influence of fluorine incorporation on the optical performance of the phosphor. Possible mechanisms responsible for the enhanced luminescence behavior, including changes in local crystal field symmetry and defect-related energy transfer processes, are discussed. These findings highlight the potential of ZrO2:Eu materials for photonic and luminescent applications.

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