Organic electroluminescent devices with molecularly doped polymers and anode interface phthalocyanine layer

✍ Scribed by Hiroshi Tada; Koji Utsugi

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 151 KB
• Volume: 8
• Category: Article
• ISSN: 1042-7147
• DOI: 10.1002/(sici)1099-1581(199707)8:7<443::aid-pat670>3.0.co;2-s

✦ Synopsis

We studied the properties of organic electroluminescent devices using molecularly doped polymers as a hole transport layer and having a metal-free phthalocyanine (H 2 Pc) layer between anode and hole transport layer. A vacuum-deposited H 2 Pc metastable layer was converted to a more stable microcrystalline layer by dichloromethane solvent treatment. The devices exhibited good currentvoltage and luminance properties. Because the activation energy of carrier transport for the devices with H 2 Pc was almost the same as that for the devices without it, it is considered that the H 2 Pc layer in this device is electrically inert. This means that improved contact efficiency may be obtained at the anode interface due to the introduction of the H 2 Pc layer.