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Poly(p-phenylenevinylene) light-emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement
Abstract
We have fabricated light-emitting diodes with poly(p-phenylenevinylene) as the emissive layer, and with an electron-transporting layer formed from a solid state dispersion of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole in poly(methyl methacrylate), placed between this and the negative electrode. These structures show typically a tenfold improvement in efficiency in the low-voltage regime and an eightfold improvement in the high-voltage regime over devices without the electron-transporting layer. Typical efficiencies are about 0.8% photons/electron. We consider that the role of the electron-transport layer is to confine holes to the emissive layer.
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Citations
Cited by
Efficient two layer leds on a polymer blend basis
Pommerehne, J., Vestweber, H., Guss, W., Mahrt, R. F., Bässler, H., Porsch, M., & Daub, J. (1995) · Advanced Materials · doi:10.1002/adma.19950070608 · Cited by 1,639
Electron Transport Materials for Organic Light-Emitting Diodes
Kulkarni, A. P., Tonzola, C. J., Babel, A., & Jenekhe, S. A. (2004) · Chemistry of Materials · doi:10.1021/cm049473l · Cited by 1,624
Novel Electroluminescent Conjugated Polyelectrolytes Based on Polyfluorene
Huang, F., Wu, H., Wang, D., Yang, W., & Cao, Y. (2004) · Chemistry of Materials · doi:10.1021/cm034650o · Cited by 632
Bright blue electroluminescence from poly(N-vinylcarbazole)
Kido, J., Hongawa, K., Okuyama, K., & Nagai, K. (1993) · Applied Physics Letters · doi:10.1063/1.110402 · Cited by 301
Metadata
- Authors
- Brown, A. R., Bradley, D. D. C., Burroughes, J. H., Friend, R. H., Greenham, N. C., Burn, P. L., Holmes, A. B., & Kraft, A.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 1992-12-07
- Volume
- 61
- Issue
- 23
- Pages
- 2793-2795
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2010512597
- Cited by
- 672
- References
- 0
- FWCI
- 43.84
- Type
- journal article
- Language
- en
- Open access
- closed
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- Brown, A. R., Bradley, D. D. C., Burroughes, J. H., Friend, R. H., Greenham, N. C., Burn, P. L., Holmes, A. B., & Kraft, A. (1992). Poly(p-phenylenevinylene) light-emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement. Applied Physics Letters. https://doi.org/10.1063/1.108094
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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