Synthesis of Oligo-biphenylene-(E)-vinyl with Hole-transport Group Side Chains, and Electron-transport Main Chain, and the Applications on OLED
Date Issued
2007
Date
2007
Author(s)
Yang, Chin-Fu
DOI
zh-TW
Abstract
Abstract
We used 2,2’-diiodobiphenyl as starting material to couple with hole transporting compounds such as triphenylamines and phenylcarbazoles on 2,2’position by Suzuki reaction. After that, the derivates of 4,4’-bis(diethyl methylphosphonate) were synthesized, and oligomerized with π electron dialdehydes by Wadsworth-Emmons reaction to generate the oligomers, which have electrotransport main chain and holetransport side chain. The aforementioned oligomers were used as light emitters or electro-polymerization precursors in Light Emitting Devices. And the respectively electrical and optical properties were studied.
All the oligomers, P1~27, have high Td,5% which ranged from 320 to 580 oC. And the Tg of these oligomers are between 75 and 242 oC.
From the results of experiments, the best device of oligomers mixed with PBD as emitting layer : we got electroluminescence of P9 as green-blue; low turn on voltage was 4V; the best brightness was1240 cd/m2, and the best efficiency was 1.69 cd/A . In the device of oligomer as HIT(ITO/CV(P1∼P27)/41+PVK+PBD/Ca/Mg) : we got P8 as 3 cycles(85nm) with 15~16V turn on voltage , 15300 cd/m2 on best brighness, and 11 cd/A on best efficiency.
Subjects
發光二極體:寡聚物
螢光
電洞注入層
電子傳輸層
發光層
PLED
OLED
HTL
HIL
emitter
triphenyl amine
Type
thesis
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