• synthesis, characterization, and electroluminescent characteristics of mixed-ligand zinc(ii) complexes

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 712
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     mixed-ligand zinc complexes, i.e., 2-(2-hydroxyphenyl)benzothiazolato-5,7- dichloro-8-hydroxyquinolinato zinc(ii) [znbtz(cl2q)], 2-(2-hydroxyphenyl) benzothiazolato-5,7-dimethyl-8-hydroxyquinolinato zinc(ii) [znbtz(me2q)], and 2-(2-hydroxyphenyl) benzothiazolato-2-carbonitril-8-hydroxyquinolinato zinc(ii) [znbtz(cnq)], were synthesized and characterized. the metal complexes have high thermal stability (>300°c) and high glass-transition temperature (>150°c) and are suitable for optoelectronic applications. optical properties of the synthesized complexes were characterized by using ultraviolet–visible (uv–vis) and photoluminescence spectroscopy. color tuning by changing the ligand was observed in synthesized complexes. multilayered organic electroluminescent devices were fabricated having structure indium–tin oxide (ito)/n,n′-diphenyl-n,n′-bis (1-naphthyl)-1,1′-biphenyl-4,4′-diamine (α-npd)/zinc complex/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (bcp)/tris (quinolinolate) aliii (alq3)/lif/al using the synthesized complexes as emissive material. the electroluminescence spectra show peak emission centered at 532 nm, 572 nm, and 541 nm, respectively, for these materials. the emitted light has chromaticity with commission internationale d’éclairage coordinates x = 0.35 and y = 0.56 for znbtz(cl2q), x = 0.49 and y = 0.47 for znbtz(me2q), and x = 0.48 and y = 0.40 for znbtz(cnq) complex.

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