Photoluminescence from Silicon Quantum Dots in Si Quantum Dots/Amorphous SiC Superlattice
- 1 September 2007
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 46 (9L) , L833
Abstract
We prepared size-controlled silicon quantum dots superlattices (Si-QDSLs) by thermal annealing of stoichiometric hydrogenated amorphous silicon carbide (a-SiC:H)/silicon-rich hydrogenated amorphous silicon carbide (a-Si1+xC:H) multilayers. Transmission electron microscope (TEM) observation revealed that silicon quantum dots were formed in only a-Si1+xC:H layers. The size of silicon quantum dots can be controlled by the thickness of the a-Si1+xC:H layers. It was found that hydrogen plasma treatment (HPT) significantly enhanced the photoluminescence of the Si-QDSLs. The luminescence peaks shifted to shorter wavelength with decreasing the diameter of the silicon quantum dots in the Si-QDSL.Keywords
This publication has 12 references indexed in Scilit:
- Preparation of Nanocrystalline Silicon in Amorphous Silicon Carbide MatrixJapanese Journal of Applied Physics, 2006
- Silicon nanostructures for third generation photovoltaic solar cellsThin Solid Films, 2006
- Silicon quantum dot superlattices: Modeling of energy bands, densities of states, and mobilities for silicon tandem solar cell applicationsJournal of Applied Physics, 2006
- Present status of intermediate band solar cell researchThin Solid Films, 2004
- Intermediate band solar cell with many bands: Ideal performanceJournal of Applied Physics, 2003
- Efficiency enhancement of ideal photovoltaic solar cells by photonic excitations in multi-intermediate band structuresApplied Physics Letters, 2003
- Improving solar cell efficiencies by up-conversion of sub-band-gap lightJournal of Applied Physics, 2002
- Size-controlled highly luminescent silicon nanocrystals: A SiO/SiO2 superlattice approachApplied Physics Letters, 2002
- On the development of bulk optical properties in small semiconductor crystallitesJournal of Luminescence, 1984
- Detailed Balance Limit of Efficiency ofp-nJunction Solar CellsJournal of Applied Physics, 1961