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Xu H.-X.,Taiyuan University of Taiyuan | Xu H.-X.,Taiyuan University of Technology | Chen L.-Q.,Taiyuan University of Taiyuan | Chen L.-Q.,Taiyuan University of Technology | And 7 more authors.
Faguang Xuebao/Chinese Journal of Luminescence | Year: 2010

Bi-molecular bis[2-(5-methyl-2-hydroxyphenyl)benzothiazolate]zinc [Zn(5-MeBTZ)2] was synthesized. Its molecular structure was confirmed by single-crystal X-ray diffraction. Single-crystal data are as follow: space group triclinic, P-1; a=0.971 9(2) nm, b=1.124 8(2) nm, c=1.190 2(2) nm; α=73.099(3)°, β=81.498(3)°, γ=76.476(3)°. Zn(5-MeBTZ)2 has a good thermal stability. The double-layer devices was employed using Zn(5-MeBTZ)2 as emitter and NPB as hole-transport material, in which Zn(5-MeBTZ)2 gave rise to unusually large width in electroluminescence (EL) spectrum, covering almost the range of visible light. The broadened EL spectra were demonstrated to be originated from the exciplexes formed at the interface between NPB and Zn(5-MeBTZ)2. White OLEDs could be expected to be realized by designing of reasonable device structure.

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