Hybrid organic light-emitting device fabricated with semiconducting polyimide via mixed vapor deposition polymerization

Author

Kim, Youngkyoo ; Jeong, Young-Yi ; Choi, Dong-Kwon

Author_Institution

Inst. for Adv. Eng., NESS Center, Kyounggi-Do, South Korea

Volume

38

Issue

8

fYear

2002

fDate

8/1/2002 12:00:00 AM

Firstpage

1039

Lastpage

1046

Abstract

Hybrid organic light-emitting devices (HOLEDs) were fabricated with the active molecularly doped polyimide (AMDPI) thin film as a hole-injecting-transporting layer through the mixed vapor deposition polymerization (VDP) process. As a comparison, the polyimide thin film as a hole-injecting-transporting layer was also prepared for a HOLED via VDP. Both the AMDPI and polyimide thin films were almost optically transparent over the entire visible range because the bandgap energy was ∼2.9 eV. HOLEDs with the AMDPI thin film showed a higher luminance and efficiency than that with the polyimide thin film. In particular, the application of a lithium-aluminum cathode significantly enhanced the luminance and the efficiency of HOLEDs with the AMDPI thin film.

Keywords

brightness; conducting polymers; electroluminescence; energy gap; light emitting diodes; organic semiconductors; polymer films; polymerisation; transparency; 2.9 eV; HOLED; LiAl; VDP; active molecularly doped polyimide thin film; bandgap energy; efficiency; hole-injecting-transporting layer; hybrid organic light. emitting device; lithium-aluminum cathode; luminance; mixed vapor deposition polymerization; optically transparent films; polyimide thin film; semiconducting polyimide; visible range; Chemical vapor deposition; Optical films; Optical polymers; Polyimides; Polymer films; Semiconductivity; Semiconductor thin films; Sputtering; Thin film devices; Transistors;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2002.801032

Filename

1021021