Journal
PHYSICAL REVIEW B
Volume 80, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.033202
Keywords
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Funding
- Sumation Co., Ltd
- Dutch nanotechnology program NanoNed
- European Community [FP7-213708]
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Results of a combined experimental and modeling study of electron transport in a blue-emitting polyfluorene-based copolymer in sandwich-type devices are presented. We show how, for wide temperature and layer thickness ranges, an accurate and internally consistent drift-diffusion model description of the voltage-dependent current density can be obtained. We employ an adapted form of the extended Gaussian disorder model, within which the density of states (DOS) is described as a superposition of a Gaussian DOS and an exponential DOS (trap states), characterized by only a small set of physically meaningful parameters. A comparison is made with the hole mobility reported for related polymers.
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