Sublimation point depression of tris(8-hydroxyquinoline)aluminum(III) (Alq3) by crystal engineering

被引：39
|
作者：
Lee, Tu
Lin, Ming Shiou
机构：
[1] Natl Cent Univ, Dept Chem & Mat Engn, Jhong Li City 320, Taiwan
[2] Natl Cent Univ, Inst Mat Sci & Engn, Jhong Li City 320, Taiwan
来源：
CRYSTAL GROWTH & DESIGN | 2007年 / 7卷 / 09期
关键词：
D O I：
10.1021/cg070226e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
An initial solvent screening technique using 23 kinds of common organic solvents was utilized to engineer the polymorphisin and crystallinity of the solids of organic electroluminescent molecules of tris(8-hydroxyquinoline) aluminum(III) (Alq3). Pure AIq3 recrystallized from N,N-dimethyl formamide (DMF) by temperature cooling from 60 to 25 degrees C gave rodlike, semicrystalline solid materials with traces of delta-form having a sublimation point of only around 200 15 degrees C. The sublimation point depression of source materials could reduce the current evaporation temperature of organic light-emitting diodes (OLEDs) drastically. In addition, three new solvates of Alq3(C6H5NO2)(1/5)(H2O)(6), Alq3(CHCl3)(1/4), and Alq(3)(C4H8O2)(1/2) were discovered from the initial solvent screening.
引用
收藏
页码：1803 / 1810
页数：8
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