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Universität Leipzig

Faculty of Physics and Earth Sciences

Felix Bloch Institute for Solid State Physics

Semiconductor Physics Group

Research Profile

We focus our research on the investigation of novel photonic and electronic semiconductor materials and phenomena and the development of devices for key areas such as internet communication, data storage, displays, illumination, environmental monitoring and life sciences. These areas exhibit rapid economicgrowth and ample employment opportunities.

Our current research topics are:

Complex nanostructures

Quantum gases at room temperature

Control of conductivity in wide bandgap semiconductors

Multiferroic heterostructures

Transparent devices

Hybrid systems of inorganic and organic matter

Our materials basis is provided by pulsed laser deposition (PLD) for the growth of oxide semiconductors [such as ZnO, (Mg,Cd)ZnO, ZnO:Mn, ZnO:Co, ZnO:(Ga,Al,N,Sb,...)], oxide semiconductor heterostructures, quantum wells and nanostructures. PLD is also used to grow ferroelectrics, high temperature superconductors and various dielectrics for insulating layers and Bragg mirrors. Also we use sputter deposition for amorphous oxides such as n-type ZnO:Sn and p-type ZnCo2O4 and cuprous iodide. PECVD is used for dielectrics in the Si-O-N system.

Facilities are available for the characterization of structural,electrical and optical material properties, among them high-resolution X-ray diffraction, scanning force microscopy, transmission electron microscopy, IV- and CV-spectroscopy, admittance, DLTS, optical DLTS, Hall effect, optical transmission and reflection, photoluminescence, micro-PL, time-resolved PL, excitation spectroscopy, Fourier transform spectroscopy, cathodoluminescence, photocurrent microscopy, generalized spectroscopic ellipsometry from the mid-infrared to the UV. Photonic and electronic devices are processed and their properties can be characterized with several set-ups, incl. on-wafer testing up to 30 GHz and fA-regime.

Our methods are also used to characterize commercial materials and devices such as GaN wafers, InGaN lasers and various solar cells.

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