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     <dc:title xml:lang="fr">Synthèse et étude des propriétés luminescentes de composés carbodiimides en vue d’application comme luminophores pour diodes blanches</dc:title>
     <dcterms:alternative xml:lang="en">Synthesis and study of the luminescent properties of carbodiimide compounds for application as phosphors for white light emitting diodes</dcterms:alternative>
     <dc:subject xml:lang="fr">Diode électroluminescente</dc:subject><dc:subject xml:lang="fr">Carbodiimide inorganique</dc:subject><dc:subject xml:lang="fr">Luminophore</dc:subject><dc:subject xml:lang="fr">Synthèse</dc:subject><dc:subject xml:lang="fr">Nitrure de carbone</dc:subject><dc:subject xml:lang="fr">Luminescence</dc:subject>
     <dc:subject xml:lang="en">light-emitting diode</dc:subject><dc:subject xml:lang="en">inorganic carbodiimide</dc:subject><dc:subject xml:lang="en">phosphor</dc:subject><dc:subject xml:lang="en">synthesis</dc:subject><dc:subject xml:lang="en">carbon nitride</dc:subject><dc:subject xml:lang="en">luminescence</dc:subject><tef:sujetRameau><tef:vedetteRameauNomCommun>
						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="02767309X">Diodes électroluminescentes</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="092468322">Cyanamide</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="050201441">Luminophores</tef:elementdEntree>
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     <dcterms:abstract xml:lang="fr">Le rôle que joue l’azote sur les propriétés luminescentes de centres luminescents (effet néphélauxétique, champ cristallin) a déjà été largement démontré dans les matériaux (oxy)nitrures. Ce travail de thèse s’inscrit dans la recherche de nouveaux luminophores azotés, les carbodiimides inorganiques, pour une application diodes blanches. Ainsi, une méthode de synthèse polyvalente à partir de nitrure de carbone a été développée pour la synthèse de différents composés carbodiimides dopés par des ions terres rares ou de métaux de transition. Les propriétés structurales et optiques des composés SrCN2 :Eu2+ (λem = 620 nm ; rouge), CaCN2 :Mn2+ (λem = 680 nm ; rouge), CaCN2 : Ce3+ (λem = 462 nm ; bleue) et ZnCN2 :Mn2+ (λem = 585 nm ; orange) sont discutées. La modulation de l’émission du bleu au rouge est rendue possible par un co-dopage Ce3+/Mn2+ dans CaCN2. La luminescence intrinsèque bleue de ZnCN2 est également reportée.
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     <dcterms:abstract xml:lang="en">The role that nitrogen plays on the luminescent properties of luminescent centers (nephelauxetic effect, crystal field) has already been widely demonstrated in (oxy)nitride materials. This thesis work focuses on the search of new nitrogen-containing phosphors, i.e. inorganic carbodiimides, for WLED applications. Thus, a versatile synthesis method based on carbon nitride has been developed for the synthesis of various carbodiimide compounds doped with rare earth or transition metal ions. The structural and optical properties of SrCN2 :Eu2+ (λem = 620 nm ; red), CaCN2 :Mn2+ (λem = 680 nm ; red), CaCN2 :Ce3+ (λem = 462 nm ; blue) and ZnCN2 :Mn2+ (λem = 585 nm ; orange) compounds are discussed. The modulation of the emission from blue to red is made achiveable by Ce3+/Mn2+ co-doping in CaCN2. The intrinsic blue luminescence of ZnCN2 is also reported.</dcterms:abstract>
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