Pulsed electroluminescence in silicon nanocrystals-based devices fabricated by PECVD
| Autor: | Blas Garrido, Laura M. Lechuga, C. Domínguez, A. Morales, Manel López, J. A. Rodríguez, Montse Riera, M. Perálvarez, Jorge Barreto |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Suboxide
Photoluminescence Materials science Silicon business.industry Annealing (metallurgy) PECVD chemistry.chemical_element Biasing Electroluminescence Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry Si-NC Field effect luminescence Plasma-enhanced chemical vapor deposition Silicon led Optoelectronics business Luminescence Silicon luminescence |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 4 páginas, 5 figuras, 1 tabla.-- PACS: 78.67.Bf. Fully compatible CMOS capacitive devices have been developed in order to obtain electrically stimulated luminescence. By high-temperature annealing in N2 atmosphere PECVD non-stoichiometric silica layers, silicon nanocrystals were formed. Photoluminescence, as well as structural studies, were carried out on these layers to decide the best material composition, which lies next to 17% of silicon excess. Under pulsed electrical stimulation, devices show sharp, narrow, less than 5 μs and pulse-frequency-independent, luminescence peaks at the end of the stimulation pulse. Current analysis on those capacities show hole injection at the beginning and electron injection at the end of the stimulation pulses. It is seen that no positive pulses are needed for attaining bipolar charge injection. Electroluminescence is detected when biasing with negative pulses at about 15 V and increasing up to 50 V. The electroluminescence spectrum matches photoluminescence one, allowing assigning both luminescent radiation to the same emission mechanism, that is, electron–hole recombination within the silicon nanocrystals. This work has been partially supported by the project NANOMAGO: MAT2002-04484, financed by the Spanish Ministry of Education and Science. |
| Databáze: | OpenAIRE |
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