Violet–blue electroluminescent diodes utilizing conjugated polymer blends
1997; Elsevier BV; Volume: 87; Issue: 2 Linguagem: Inglês
10.1016/s0379-6779(96)03820-9
ISSN1879-3290
AutoresJingsong Huang, Haifeng Zhang, Wenjing Tian, Jingying Hou, Yuguang Ma, Jiacong Shen, Shiyong Liu,
Tópico(s)Conducting polymers and applications
ResumoWe report violet–blue emission from light-emitting diodes (LEDs) fabricated by dispersing a soluble conjugated polymer poly(2,5-dibutoxyphenylene) (PPP) and an organic electron-transporting material 2-(4-biphenylyl)-5-(4-tert-butyl-phenyl)-1,3,4-oxadiazole (PBD) into a hole-transporting polymer poly(N-vinylcarbazole) (PVK). The emission film can be spin-coated by the blend solution. The air-stable aluminum is used as the cathode material. The electroluminescent efficiency of the device reaches 1.2%, which is more than 100 times that of the device made with only PPP. The LEDs turn on at about 20 V and have a peak emission wavelength in the violet–blue region at 424 nm.
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