PMSE 6 |
| A novel study in hole-transport polyurethanes (PU's) has been developed. The PU's materials were prepared from condensation polymerization of isophorone diisocyanate (IPDI) and 3,6-diphenol-9-butylcarbazole 4, with various amounts of 2,5-bis(4-hydroxyphenyl)-1,3,4-oxadiazole 5, and with 4-tert-butyl phenol as the end group when terminating the reaction.. The PU's materials show increased hole-injection properties that were concluded on the basis of the improved current injection in the corresponding hole-only device. The Cz-PU interfacial layer has been inserted in ITO/PEDOT-PSS(30nm)/PU(30nm)/NPB(40nm)/Alq3(40nm)/LiF(1nm) /Al(150nm) when fabricating the OLED device has a dramatic voltage reduction of 3.0V. The performance of luminance efficiency in the OLED device was improved up to 4.40 cd/A. The maximum brightness increases up to 17120 cd/m2 with the Cz: OXD ratio of 1: 1 compared with that of 9223 cd/m2 for the standard device in device configuration ITO/PEDOT-PSS(30nm)/ƒ{NPB(40nm)/Alq3(40nm)/LiF(1nm)/Al(150 nm). |
|
New Concepts in Polymeric Materials
8:00 AM-11:20 AM, Sunday, August 19, 2007 Westin Boston Waterfront -- Grand Ballroom D, Oral
Division of Polymeric Materials: Science & Engineering |