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Fabrication and luminescence properties of Si quantum dots based on Si-rich SiNx/N-rich SiNy multilayer
- Source :
- Acta Physica Sinica. 59:5823
- Publication Year :
- 2010
- Publisher :
- Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences, 2010.
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Abstract
- SiN-based multilayers were prepared in a plasma enhanced chemical vapor deposition system followed by subsequently thermal annealing and laser irradiation with the aim of fabrication three-dimensional constrained, size-controlled and well-regulated Si nanocrystals. The experimental results show that Si nanocrystals grow in the Si-rich SiN sublayer. Furthermore, the grain size can be controlled according to the thick of Si-rich SiN. It is also found that the crystalline fraction of the multilayers irradiated by laser is significantly higher than that by thermal annealing. The devices that employing the laser-irradiated multilayer as luminescent active layer exhibit an enhanced visible electroluminescence and the external quantum efficiency is improved by 40% in comparison with the device without annealing.
Details
- ISSN :
- 10003290
- Volume :
- 59
- Database :
- OpenAIRE
- Journal :
- Acta Physica Sinica
- Accession number :
- edsair.doi...........b81152781411404eb08cdd9066072680