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Synthèse et étude des propriétés luminescentes de composés carbodiimides en vue d’application comme luminophores pour diodes blanches

Abstract : 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.
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Submitted on : Tuesday, April 20, 2021 - 2:46:18 PM
Last modification on : Wednesday, March 16, 2022 - 3:52:19 AM

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LEYSOUR_de_ROHELLO_Erwan.pdf
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  • HAL Id : tel-03203071, version 1

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Erwan Leysour de Rohello. Synthèse et étude des propriétés luminescentes de composés carbodiimides en vue d’application comme luminophores pour diodes blanches. Matériaux. Université Rennes 1, 2020. Français. ⟨NNT : 2020REN1S062⟩. ⟨tel-03203071⟩

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