Firma/Institution: Institute of Solid State Physics, Friedrich Schiller University Jena Land: Germany Position: PhD Position eingegangen am: 07/02/2007
Beschreibung:
One PhD position or one PostDoc position is available in the Laboratory Astrophysics and Cluster Physics Group of the Institute of Solid State Physics at the Friedrich Schiller University Jena. The project Characterization of structural and optical properties of Si/Ge nanocrystals produced by laser-induced pyrolysis and by ion implantation is funded by the Deutsche Forschungsgemeinsch aft. Depending on the qualification of the applicant, the position can be given to a PhD student for 3 years (BAT IIa/2) or to a PostDoc for 1½ years (BAT IIa).
Project description:
The first objective of the present project is to produce Si1 - xGex nanocrystals or quantum dots covering the entire range from x = 0 to x = 1 by means which have not yet been exploited: (1) in the gas phase by laser-induced pyrolysis of a mixture of silane (SiH4) and germane (GeH4), and for comparison (2), in matrices by sequential ion (Si+ and Ge+) implantation and postannealing. The nanocrystals prepared in process (1) will be selected in size and deposited on substrates in the form of thin films, whereas those prepared by method (2) will be embedded in solid matrices (mainly silica). Applying both techniques and varying the process parameters, Si1 - xGex nanocrystals with different Si/Ge concentrations and with various surroundings, passivating oxide shell in (1) or matrix in (2), will be produced. In a second step, the structure and composition of the quantum dots will be characterized by electron microscopy as well as IR and Raman spectroscopy. Finally, constituting
the most important objective of the proposal, we will investigate the photoluminescence (PL) properties of the Si1 -xGex quantum dots as a function of their size and composition.
Bitte senden Sie Ihre Bewerbung an:
Kontakt Prof. Dr. Friedrich Huisken Adresse Institute of Solid State Physics Helmholtzweg 3
Ort Jena Postleitzahl 07743 Telefon 03641/947354 E-Mail friedrich.huisken@ uni-jena. de
Weitere Informationen:
Kontakt Prof. Dr. Friedrich Huisken Adresse Institute of Solid State Physics Helmholtzweg 3 Ort Jena Postleitzahl 07743 Telefon 03641/947354 E-Mail friedrich.huisken@ uni-jena. de URL http://www.physik. uni-jena. de/~exphys/ astrolab/
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