Synthesis of polymers for hole and electron transport materials in organic electroluminescent devices

Author

Son, Jhun Mo ; Sakaki, Yuichi ; Ogino, Kenji ; Sato, Hisaya

Author_Institution

Fac. of Technol., Tokyo Univ. of Agric. & Technol., Japan

Volume

44

Issue

8

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

1307

Lastpage

1314

Abstract

Styrene-type polymers having tetraphenylbenzidine (TPD) or tetraphenylphenyldiaminobenzene unit (PDA) and a oxadiazole unit (PBD) on the side chain were prepared as hole and electron transport materials, respectively, of an electroluminescent (EL) device. The device structures employed were [indium-tin-oxide (ITO)/hole transport layer (HTL)/Al] (type I), or [ITO/hole transport layer (HTL)/electron transport layer (ETL)/Al] (type II). Type I devices provided current density higher than 100 mA/cm² but no luminescence was observed. Type II devices emitted luminescence of about 10 cd/m² at the current density of about 170 mA/cm². The emission maximums of these devices were 460 and 530 nm for the device using TPD and PDA, respectively

Keywords

conducting polymers; current density; electroluminescent devices; materials preparation; organic semiconductors; polymer films; polymerisation; 460 nm; 530 nm; Al; EL device; ITO; ITO/hole transport layer/Al structure; ITO/hole transport layer/electron transport layer/Al structure; InSnO; PDA; TPD; current density; electron transport materials; hole transport materials; luminescence; organic electroluminescent devices; oxadiazole; polymer synthesis; styrene-type polymers; tetraphenylbenzidine; tetraphenylphenyldiaminobenzene; Charge carrier processes; Crystals; Current density; Electroluminescent devices; Fluorescence; Indium tin oxide; Luminescence; Organic materials; Polymer films; Voltage;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.605473

Filename

605473