13.08.18, 14:00 Uhr: Kolloquium - Prof. Dr. Dr. h.c. Ullrich Pietsch:
'Probing Structure to property relations of single semiconductor nanowires'

 

Am Montag, den 13.08.18, um 14:00 Uhr
spricht in unserem Institutskolloquium


Prof. Dr. Dr. h.c. Ullrich Pietsch
Department Physik, Festkörperphysik, Universität Siegen


zum Thema:

"Probing Structure to property relations of single semiconductor nanowires"

 


Abstract:

Semiconductor nanowires, including core-multi-shell nanowire heterostructures, grow in the cubic zincblende and/or the hexagonal wurtzite phases. Due to their different structural properties, these crystal phases can possess different physical properties. Here, we demonstrate the direct correlation between the structural and electrical and optical properties of several single core-multi-shell GaAs/In0.15Ga0.85As/GaAs/AlAs/GaAs nanowires grown by MBE onto pre-patterned 111 Si substrate. Due to alignment of electron beam lithography drilled holes along a single line, it was possible to access individual nanowires and to investigate both properties in as-grown geometry. The structural phase composition of single nanowires was revealed by synchrotron beam assisted X-ray nano-diffraction. The optical and electrical properties of the same NWs were extracted by home lab cathodoluminescence measurements and measuring I-V characteristics by a focussed beam equipment.


Gäste sind herzlich willkommen.

 

Veranstaltungsort:

Leibniz-Institut für Kristallzüchtung

Raum 316, Geb. 19.31,

Max-Born-Str. 2

12489 Berlin-Adlershof

 

03.09.18, 14.00 Uhr: Kolloquium - Dr. Frank Zobel:
'Float-Zone Kristalle aus vorgezogenen Vorratsstäben für Anwendungen in der Photovoltaik'

 

Am Montag, den 03.09.18 um 14.00 Uhr

spricht in unserem Institutskolloquium


Dr. Frank Zobel
Fraunhofer-Center für Silizium Photovoltaik CSP


zum Thema:

"Float-Zone Kristalle aus vorgezogenen Vorratsstäben für Anwendungen in der Photovoltaik"

 

 

Gäste sind herzlich willkommen.

 

Veranstaltungsort:

Leibniz-Institut für Kristallzüchtung

Raum 316, Gebäude 19.31

Max-Born-Str. 2

D-12489 Berlin-Adlershof

 

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