Abstract
Incorporation of Eu3+ and Tb3+ ions into single crystals of cubic boron nitride (c-BN) has been performed by mixing these fluorides into a solvent for crystal growth of c-BN under high pressure. This method consequently brings luminous features into c-BN. The doped c-BN single crystals show no discernible structural changes in their matrices, while their elements are incorporated into the whole of crystals in atomic scale. Photoluminescence spectra of c-BN:Eu and c-BN:Tb exhibit the intra-4f electron transitions of Eu3+ and Tb3+ ions, starting from their excitation levels, D05 and D45, respectively.
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