POLYMER LIGHT-EMITTING-DIODES WITH SINGLE-LAYER AND DOUBLE-LAYER STRUCTURES USING POLY(2,3-DIPHENYLQUINOXALINE-5,8-DIYL)

Authors
YAMAMOTO T INOUE T KANBARA T
Citation
T. Yamamoto et al., POLYMER LIGHT-EMITTING-DIODES WITH SINGLE-LAYER AND DOUBLE-LAYER STRUCTURES USING POLY(2,3-DIPHENYLQUINOXALINE-5,8-DIYL), JPN J A P 2, 33(2B), 1994, pp. 120000250-120000253
Citations number
35
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS → ACNP
Volume
33
Issue
2B
Year of publication
1994
Pages
120000250 - 120000253
Database
ISI
SICI code
Abstract
A light-emitting diode (LED) using poly(2,3-diphenylquinoxaline-5,8-di yl) (PdPhQx) as the light-emitting material, ITO/PdPhQx/MgAg, emits bl ue-green (490 nm) light. Introduction of hole transporting layers such as vacuum-deposited or spin-coated thin layers of poly(thiophene-2,5- diyl), poly(p-phenylene), and poly(N-vinylcarbazole) between ITO and P dPhQx in the LED enhances electroluminescence efficiency by about two orders of magnitude. Addition of a diaryldiamine (TPD) in the PdPhQx l ayer causes a red shift of the emitted light to 565 nm due to formatio n of an exciplex between PdPhQx and TPD.