EMISSION CHARACTERISTICS OF ORGANIC LIGHT-EMITTING DIODES WITH A HETEROSTRUCTURE OF DYE DOPED POLY(N-VINYLCARBAZOLE)/TRIS(8-HYDROXYQUINOLINE) ALUMINUM

• 来源期刊: 高分子科学（英文版）
• 年，卷（期）: 1999,（4）
• 页码范围: 337-342
• 页数: 6页
• 语种: 英文

摘要

Organic electroluminescent diodes with a heterostructure of 9,10-bis(phenylethnyl) anthracene (BPEA) doped poly(N-vinylcarbazole) (PVK)/tris(8-hydroxyquinoline)aluminum (Alq3) have been fabricated. The electroluminescence (EL) both from BPEA and Alq3 were observed when the Alq3 layer is thin enough. With increasing thickness of the Alq3 layer, the relative emission intensity of BPEA is gradually decreased. For the thin Alq3 layer structure, the light emission of Alq3 becomes more dominant as the applied voltage increases. It is proposed that the electron-hole recombination takes place in both PVK and Alq3 films.The field-induced quenching theory has also been applied to explain the change of the EL spectra with applied voltage.