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Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer
Abstract
We report experiments on bilayer light emitting diodes made with organically capped CdSe(CdS) core/shell type semiconductor nanocrystals and an electroluminescent (EL) semiconducting polymer [poly(p-phenylenevinylene) or PPV]. The devices emit from red to green with external quantum efficiencies of up to 0.22% at brightnesses of 600 cd/m2 and current densities of 1 A/cm2. They have operating voltages as low as 4 V and lifetimes under constant current flow of hundreds of hours. Most of these numbers are significant improvements over similar devices made with CdSe nanocrystals. The devices show either nanocrystal-only EL or a combination of nanocrystal and PPV EL, depending on nanocrystal layer thickness. The nanocrystal EL is dependent on nanocrystal size. Some devices show a voltage dependent spectral output. The spectral output is consistent with a field dependent electron range in the nanocrystal layer limited by carrier trapping.
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Citations
Cited by
Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals
Yu, W. W., Qu, L., Guo, W., & Peng, X. (2003) · Chemistry of Materials · doi:10.1021/cm034081k · Cited by 4,997
Self-citationShape control of CdSe nanocrystals
Peng, X., Manna, L., Yang, W., Wickham, J., Scher, E., Kadavanich, A., & Alivisatos, A. P. (2000) · Nature · doi:10.1038/35003535 · Cited by 4,487
Self-citationSynthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
Murray, C. B., Kagan, C. R., & Bawendi, M. G. (2000) · Annual Review of Materials Science · doi:10.1146/annurev.matsci.30.1.545 · Cited by 4,353
Formation of High-Quality CdTe, CdSe, and CdS Nanocrystals Using CdO as Precursor
Peng, Z. A., & Peng, X. (2001) · Journal of the American Chemical Society · doi:10.1021/ja003633m · Cited by 2,741
Self-citationThiol-Capping of CdTe Nanocrystals: An Alternative to Organometallic Synthetic Routes
Gaponik, N., Talapin, D. V., Rogach, A. L., Hoppe, K., Shevchenko, E. V., Kornowski, A., Eychmüller, A., & Weller, H. (2002) · The Journal of Physical Chemistry B · doi:10.1021/jp025541k · Cited by 1,540
Metadata
- Authors
- Schlamp, M. C., Peng, X., & Alivisatos, A. P.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 1997-12-01
- Volume
- 82
- Issue
- 11
- Pages
- 5837-5842
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2077711191
- Cited by
- 913
- References
- 0
- FWCI
- 14.71
- Type
- journal article
- Language
- en
- Open access
- closed
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- Schlamp, M. C., Peng, X., & Alivisatos, A. P. (1997). Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer. Journal of Applied Physics. https://doi.org/10.1063/1.366452
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
