## Electroluminescent (EL) devices have been fabricated using four different polymers with different glass transi as a hole transport layer and tris(8-hydroxyquinoline) aluminum (Alq 3 ) as an emitting layer. It was found that the higher the T g of the polymer, the longer the lifetime of the dev
Electron transport in a molecularly doped polymer
โ Scribed by P. M. Borsenberger; W. T. Gruenbaum
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 657 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0887-6266
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โฆ Synopsis
Electron mobilities have been measured in l,l'-dioxo-2-(4-methylphenyl)-6-phenyl-4-(di-cyanomethy1idene)thiopyran (PTS) doped poly(styrene) (PS) over a range of fields, temperatures, and PTS concentrations. The results are described by a formalism based on disorder, due to Bassler and coworkers. The key parameter of the formalism is the energy width of the hopping sites. For PTS-doped PS, the width is approximately 0.129 eV and independent of the PTS concentration. The width is described by a model based on dipolar disorder. The model assumes the width is determined by a dipolar component due to the PTS dopant molecule and a van der Waals component. Agreement with experiment requires that the van der Waals component be dependent on the P T S concentration, increasing with increasing PTS dilution.
๐ SIMILAR VOLUMES
Hole mobilities have been measured in di-p-tolylphenylamine-doped poly-(styrene) containing 1-phenyl-3-p-diethylaminostyryl-5-p-diethylamino-phenylpyrazoline (DEASP), an 0.38 eV trap. For molar concentrations of less than a few multiples of 10 ฯช7 , DEASP has no effect on the mobility. For concentrat