On the mechanism of electroluminescence emission by porous silicon layers

• Authors: Jaime Velasco
• Languages of publication: EN

Abstracts

EN

The analytical treatment of a model considering the electrooxidation of p-porous silicon layers under galvanostatic conditions is able to give account of experimental facts such as the shape and location of the electroluminescence peak as well as of the spectral shift of the electroluminescence peak produced by oxidation. The proposed model considers electroluminescence to be the result of electron injection into the conduction band by an adsorbed intermediate produced by electrooxidation of the surface coverage with hydrogen or siloxene of the silicon nanocrystallites. The access of holes to the surface is made possible by low accumulation layer conditions and is the rate determining step in the electroluminescence mechanism. In this way it is possible to give a satisfactory explanation to the shift towards the blue experimented by the electroluminiscence emission maximum as a consequence of electrooxidation.

Keywords

EN

Electroluminescence mechanism; porous silicon; emission blue shift

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2005
• Volume: 3
• Issue: 3
• Pages: 470-481

Dates

published

1 - 9 - 2005

online

1 - 9 - 2005

Contributors

author

Jaime Velasco

• Facultad de Ciencias, Departamento de Química, Universidad Autónoma de Madrid, C-IX-503, 28049, Canloblanco, Madrid, Spain

References

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Identifiers

DOI

10.2478/BF02479276