Synthesis and Photo-electricity Properties of Hydroxyphenyl-pyrimidine Beryllium(Ⅱ) Complex

doi:10.3969/j.issn.0251-0790.2012.09.032

Abstract

Abstract:

A novel chelating ligand 2-hydroxyphenyl-pyrimidine (HPP) was designed and synthesized through Suzuki coupling reaction. Its beryllium complex bisberyllium was also prepared in high yields and characterized by IR and ¹H NMR. Upon photoexcitation, the complex displayed intense blue emission (λ_max=460 nm) in methanol solvent at room temperature. In addition, a white organic electroluminescent device was fabricated by vacuum thermal evaporation with a double-layer structure of indium tin oxides(ITO)/N,N'-bis(naphthalene-2-yl)-N,N'-diphenyl--4,4'-diamine (NPB)(45 nm)/Be(PP)₂(60 nm)/Al(300 nm) using the Be(PP)₂ as emitting and electro-transporting material. The non-doping device showed a lower turn-on voltage of 4 V, a maximum brightness of 103 cd/m², a commission internationale de I'Eclairage (CIE) color coordinates of (0.37, 0.39) and luminous efficiency of 0.13 lm/W.

Key words: Hydroxyphenyl-pyrimidine beryllium, Organic luminescent material, White organic electroluminescent device

CLC Number:

O641

TrendMD:

LI Peng, ZHANG Heng-Jun, ZHU Dong-Xia, SHAN Guo-Gang, LIAO Yi, SU Zhong-Min. Synthesis and Photo-electricity Properties of Hydroxyphenyl-pyrimidine Beryllium(Ⅱ) Complex[J]. Chem. J. Chinese Universities, 2012, 33(09): 2056.

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