申请人:Hoechst Aktiengesellschaft
公开号:US05840217A1
公开(公告)日:1998-11-24
Use of spiro compounds of the formula (I) ##STR1## where K.sup.1 and K.sup.2 are, independently of one another, conjugated systems, in electroluminescence devices. Preferred compounds of the formula (I) are 9,9'-spirobifluorene derivatives of the formula (II) ##STR2## where the benzo groups can be substituted independently of one another. Compounds of the formula (I) have a good solubility in customary organic solvents, improved film-forming properties and a significantly reduced tendency to crystallize. The production of electroluminescence devices is thereby made easier and their service life is increased.
使用公式(I)的螺环化合物在电致发光器件中。其中,K.sup.1和K.sup.2是独立的共轭系统。公式(I)的首选化合物是公式(II)的9,9'-螺联苯衍生物,其中苯基可以独立取代。公式(I)的化合物在常用有机溶剂中具有良好的溶解性,改善了成膜性能并显著降低了结晶倾向。因此,电致发光器件的制造变得更加容易,其使用寿命也得到了提高。