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ELECTROLUMINESCENCE OF A DEVICE BASED ON A NEW TERBIUM β-DIKETONATE COMPLEX

ELECTROLUMINESCENCE OF A DEVICE BASED ON A NEW TERBIUM β-DIKETONATE COMPLEX . A.Pereira 1 ,G. Conte 2 , H. Gallardo 2 , W. G. Quirino 3 , K. C. Teixeira 3 , C. Legnani 3 M. Cremona 3, 4 and I. H. Bechtold 1 1 Department of Physics and 2 Department of Chemistry, UFSC

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ELECTROLUMINESCENCE OF A DEVICE BASED ON A NEW TERBIUM β-DIKETONATE COMPLEX

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  1. ELECTROLUMINESCENCE OF A DEVICE BASED ON A NEW TERBIUM β-DIKETONATE COMPLEX • A.Pereira1,G. Conte2, H. Gallardo2, W. G. Quirino3, K. C. Teixeira3, C. Legnani3M. Cremona3, 4 and I. H. Bechtold1 • 1Department of Physics and 2Department of Chemistry, UFSC • 3LADOR– Laboratory of Organic Devices, Inmetro • 4 Department of Physics,PUC-RJ Laboratório de Sistemas Anisotrópicos E-mail: ales_p18@yahoo.com.br

  2. OLED Technology:

  3. Motivation: • The use of trivalent rare earth ions complexes containing organic moiety is a possible route to obtain pure color emission with a theoretical upper limit of inner quantum efficiency near 100%. • These complexes emit with a narrow emission spectrum characteristic of intra-atomic transitions of the central rare earth ion, covering the spectral range from ultraviolet to infrared, which make them with organic ligands candidates for full color OLEDs applications.

  4. Objectives: To check the feasibility of using a novel Terbium complex as electroluminescent layer.

  5. Materials: The structures of the complexes. (a) Tb(N-PA)3Phen and Tb(N-PA)3Bipy; (b) Tb(FURA)3Phen and Tb(FURA)3Bipy. ([1,2,5]tiadiazol[3,4f][1,10]fenantrolina) complex-Tb (acetilacetona-ACAC) Hole transport molecule Y. Fu et al(2008).

  6. Experimental setup: LADOR-INMETRO OLED bilayer The devices were fabricated with the following structure: ITO/NPB(50nm)/Complex-Tb(50nm)/Al(150nm).

  7. Characterization: Absorption spectrum at room temperature from thin films of Terbium complex. Photoluminescence spectra at room temperature from thin films of Terbium complex.

  8. Characterization: IxV plot, from OLED based on a new Terbium complex as a function of bias voltage. Electroluminescence spectra of the Terbium complex. Picture of a produced OLED. Orange!!!

  9. Conclusions and perspectives: The electroluminescence spectrum shows two large bands resulting an orange light emission, which was not observed in the photoluminescence. It indicates a possible problem in the charge transport or in the manufacturing architecture. The device shows a typical diode behavior with a low threshold bias voltage of about 10V. To investigate the observed effect in the electroluminescence: - ligands contribution - OLED architecture

  10. Financial Supports: INEO – Instituto Nacional de Eletrônica Orgânica Thanks for attention !!

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