The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Electroluminescence of different colors from polycation/CdTe nanocrystal self-assembled films
Abstract
Water soluble thiol capped CdTe nanocrystals are assembled into ultrathin films in combination with poly(diallyldimethylammonium chloride) (PDDA) by the self-assembly method of layer-by-layer adsorption of oppositely charged polyelectrolytes. Electroluminescent devices, which produce different color emissions, are fabricated by sandwiching CdTe/PDDA films between indium–tin–oxide (ITO) and aluminum electrodes using CdTe nanocrystals of different sizes. It is shown that the electroluminescence (EL) spectra of the CdTe/polymer films are nearly identical to the photoluminescence spectra of the corresponding CdTe nanocrystals in aqueous solutions. The devices produce room-light visible light output with an external quantum efficiency up to 0.1%. Light emission is observed at current densities of 10 mA/cm2 and at low onset voltages of 2.5–3.5 V, which depends on the thickness of the film indicating field-dependent current injection. A variation of the EL efficiency with the size of the CdTe particles is observed and explained by the size dependent shift of the CdTe energy levels with respect to the work function of the electron injecting Al electrode. This is confirmed by the behavior of two-layer devices prepared from two differently sized CdTe particles being spatially separated, i.e., one size CdTe near ITO and the other size CdTe near Al by using the self-assembly method.
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Cites
Dabbousi, B. O., Rodriguez-Viejo, J., Mikulec, F. V., Heine, J. R., Mattoussi, H., Ober, R., Jensen, K. F., & Bawendi, M. G. (1997) · The Journal of Physical Chemistry B · doi:10.1021/jp971091y · Cited by 4,229
Cited by
Thiol-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
Self-citationQuantum Dots and Their Multimodal Applications: A Review
Bera, D., Qian, L., Tseng, T.-K., & Holloway, P. H. (2010) · Materials · doi:10.3390/ma3042260 · Cited by 1,365
Bright, multicoloured light-emitting diodes based on quantum dots
Sun, Q., Wang, Y. A., Li, L. S., Wang, D., Zhu, T., Xu, J., Yang, C., & Li, Y. (2007) · Nature Photonics · doi:10.1038/nphoton.2007.226 · Cited by 1,147
Designer polymer–quantum dot architectures
Tomczak, N., Jańczewski, D., Han, M., & Vancso, G. J. (2009) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2008.11.004 · Cited by 332
Metadata
- Authors
- Gao, M., Lesser, C., Kirstein, S., Möhwald, H., Rogach, A. L., & Weller, H.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 2000-03-01
- Volume
- 87
- Issue
- 5
- Pages
- 2297-2302
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2038743355
- Cited by
- 307
- References
- 1
- FWCI
- 10.19
- Type
- journal article
- Language
- en
- Open access
- closed
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- Gao, M., Lesser, C., Kirstein, S., Möhwald, H., Rogach, A. L., & Weller, H. (2000). Electroluminescence of different colors from polycation/CdTe nanocrystal self-assembled films. Journal of Applied Physics. https://doi.org/10.1063/1.372177
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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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