Spectroscopic Properties of Lanthanide-Doped Sodium Calcium Borate (NCOB)–Based Nanophosphors

Project no. 32607 · Status: Kapanmış · 2024

Summary

<p>The&nbsp;fact&nbsp;that&nbsp;approximately&nbsp;72%&nbsp;of&nbsp;the&nbsp;world’s&nbsp;boron&nbsp;reserves&nbsp;are&nbsp;located&nbsp;within&nbsp;the&nbsp;borders&nbsp;of&nbsp;Türkiye&nbsp;significantly&nbsp;enhances&nbsp;the&nbsp;strategic&nbsp;importance&nbsp;of&nbsp;boron&nbsp;and&nbsp;underscores&nbsp;the&nbsp;necessity&nbsp;for&nbsp;its&nbsp;broader&nbsp;utilization&nbsp;in&nbsp;scientific&nbsp;research&nbsp;and&nbsp;advanced&nbsp;material&nbsp;applications.&nbsp;In&nbsp;this&nbsp;project,&nbsp;the&nbsp;spectroscopic&nbsp;properties&nbsp;of&nbsp;undoped&nbsp;and&nbsp;lanthanide-&nbsp;and&nbsp;lithium–potassium-doped&nbsp;Sodium&nbsp;Calcium&nbsp;Borate&nbsp;(NaCa₄(BO₃)₃,&nbsp;NCOB)–based&nbsp;materials,&nbsp;synthesized&nbsp;via&nbsp;the&nbsp;combustion&nbsp;method,&nbsp;will&nbsp;be&nbsp;systematically&nbsp;investigated.&nbsp;Structural&nbsp;characterization&nbsp;and&nbsp;particle&nbsp;size&nbsp;analysis&nbsp;will&nbsp;be&nbsp;performed&nbsp;using&nbsp;X-ray&nbsp;diffraction&nbsp;(XRD)&nbsp;and&nbsp;scanning&nbsp;electron&nbsp;microscopy&nbsp;coupled&nbsp;with&nbsp;energy-dispersive&nbsp;X-ray&nbsp;spectroscopy&nbsp;(SEM–EDX)&nbsp;techniques.&nbsp;The&nbsp;optical&nbsp;properties&nbsp;of&nbsp;undoped&nbsp;and&nbsp;lanthanide–lithium–potassium-doped&nbsp;borate-based&nbsp;phosphors&nbsp;will&nbsp;be&nbsp;examined&nbsp;using&nbsp;photoluminescence&nbsp;(PL)&nbsp;spectroscopy,&nbsp;while&nbsp;their&nbsp;dosimetric&nbsp;properties&nbsp;will&nbsp;be&nbsp;evaluated&nbsp;through&nbsp;the&nbsp;thermoluminescence&nbsp;(TL)&nbsp;technique.&nbsp;To&nbsp;investigate&nbsp;the&nbsp;optical&nbsp;behavior&nbsp;in&nbsp;detail,&nbsp;borate-based&nbsp;materials&nbsp;co-doped&nbsp;with&nbsp;lanthanide&nbsp;(RE:&nbsp;rare&nbsp;earth)&nbsp;ions&nbsp;at&nbsp;various&nbsp;concentrations,&nbsp;namely&nbsp;NaCa₄(BO₃)₃:Eu³⁺,Ln³⁺&nbsp;(Ln&nbsp;=&nbsp;Tb,&nbsp;Dy,&nbsp;Sm,&nbsp;Yb,&nbsp;etc.)&nbsp;and&nbsp;NaCa₄(BO₃)₃:Eu³⁺,Li,K,&nbsp;will&nbsp;be&nbsp;synthesized.&nbsp;Temperature-dependent&nbsp;excitation&nbsp;and&nbsp;emission&nbsp;spectra&nbsp;will&nbsp;be&nbsp;recorded&nbsp;via&nbsp;PL&nbsp;spectroscopy,&nbsp;and&nbsp;energy&nbsp;transfer&nbsp;processes&nbsp;between&nbsp;the&nbsp;RE&nbsp;ions&nbsp;and&nbsp;the&nbsp;host&nbsp;lattice,&nbsp;as&nbsp;well&nbsp;as&nbsp;RE–RE&nbsp;energy&nbsp;transfer&nbsp;mechanisms,&nbsp;will&nbsp;be&nbsp;systematically&nbsp;analyzed.&nbsp;For&nbsp;the&nbsp;assessment&nbsp;of&nbsp;dosimetric&nbsp;performance,&nbsp;critical&nbsp;parameters&nbsp;such&nbsp;as&nbsp;heating&nbsp;rate&nbsp;and&nbsp;dose&nbsp;dependence,&nbsp;linear&nbsp;dose–response&nbsp;behavior,&nbsp;reusability&nbsp;over&nbsp;multiple&nbsp;irradiation&nbsp;cycles,&nbsp;and&nbsp;fading&nbsp;characteristics&nbsp;will&nbsp;be&nbsp;evaluated&nbsp;using&nbsp;the&nbsp;thermoluminescence&nbsp;(TL)&nbsp;method.&nbsp;Since&nbsp;the&nbsp;literature&nbsp;lacks&nbsp;a&nbsp;comprehensive&nbsp;photoluminescence&nbsp;(PL)&nbsp;and&nbsp;thermoluminescence&nbsp;(TL)&nbsp;investigation&nbsp;addressing&nbsp;energy&nbsp;transfer&nbsp;mechanisms&nbsp;and&nbsp;temperature-dependent&nbsp;behavior&nbsp;in&nbsp;doped&nbsp;Sodium&nbsp;Calcium&nbsp;Borate&nbsp;(NCOB)–based&nbsp;phosphors,&nbsp;this&nbsp;study&nbsp;is&nbsp;expected&nbsp;to&nbsp;make&nbsp;a&nbsp;significant&nbsp;contribution&nbsp;to&nbsp;the&nbsp;scientific&nbsp;literature.&nbsp;Furthermore,&nbsp;the&nbsp;results&nbsp;will&nbsp;help&nbsp;identify&nbsp;potential&nbsp;application&nbsp;areas&nbsp;of&nbsp;these&nbsp;materials&nbsp;as&nbsp;advanced&nbsp;optical&nbsp;and&nbsp;dosimetric&nbsp;materials.</p><p></p><p></p><p></p><p></p><p></p><p></p><p></p>

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