標題: Organic electroluminescent derivatives containing dibenzothiophene and diarylamine segments
作者: Huang, TH
Whang, WT
Shen, JY
Lin, JT
Zheng, HG
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 2005
摘要: A new series of 2,8-disubstituted dibenzothiophenes have been successfully synthesized via palladium-catalyzed C-N or C-C bond formation using 2,8-dibromodibenzothiophene and diarylamines as starting materials. These new dibenzothiophene derivatives are amorphous with a glass transition temperature ranging from 86 to 190 degrees C. Furthermore, they are fluorescent in the blue to bluish green region. Two types of light-emitting diodes ( LED) were constructed from these compounds, ( I) ITO/Cpd/TPBI/LiF/Al and (II) ITO/Cpd/Alq3/LiF/Al, where TPBI and Alq(3) are 1,3,5-tris(N-phenylbenzimidazol-2-yl) benzene and tris(8-hydroxyquinolinato) aluminium, respectively. In type I devices, the compounds function as the hole-transporting and emitting material. In type II devices, emission from Alq3 is observed. Several type I devices emit pure blue light, and most of the devices II have very promising performance. The relation between the energy levels of the materials and the performance of the light-emitting diodes is discussed.
URI: http://hdl.handle.net/11536/25449
http://dx.doi.org/10.1039/b507210g
ISSN: 0959-9428
DOI: 10.1039/b507210g
期刊: JOURNAL OF MATERIALS CHEMISTRY
Volume: 15
Issue: 31
起始頁: 3233
結束頁: 3240
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