Optical studies of ZnO nanocrystals doped with Eu3+ ions

resumo

Synthetic ZnO nanocrystals have been intentionally doped with Eu3+ ions. Structural analysis performed on the nanocrystals showed wurtzite-ZnO as the only phase present in the samples. Photoluminescence in emission and excitation modes allows the assignment of the intra-4f(6) transitions for the Eu3+ ions. From the analysis of the optical data we are able to demonstrate that multiple Eu-related optical centres are present in the studied samples. Oxygen vacancies are likely candidates to be responsible for the ion accommodation in the ZnO lattice and from the photoluminescence excitation data we tentatively assign a trap level at similar to 200 meV below the conduction band to this intrinsic defect.

palavras-chave

IMPLANTED GAN; QUANTUM DOTS; THIN-FILMS; PHOTOLUMINESCENCE; SAMPLES; GREEN; LUMINESCENCE

categoria

Materials Science; Physics

autores

Peres, M; Cruz, A; Pereira, S; Correia, MR; Soares, MJ; Neves, A; Carmo, MC; Monteiro, T; Pereira, AS; Martins, MA; Trindade, T; Alves, E; Nobre, SS; Ferreira, RAS

nossos autores

Partilhe este projeto

Publicações similares

Usamos cookies para atividades de marketing e para lhe oferecer uma melhor experiência de navegação. Ao clicar em “Aceitar Cookies” você concorda com nossa política de cookies. Leia sobre como usamos cookies clicando em "Política de Privacidade e Cookies".