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Semiconductor Nanostructures

Scientific profile

The Semiconductor Nanostructures group focuses on basic materials research for the conversion of light into other forms of energy in the context of renewable energies, sensor technology and photo-powered hydrogen generation. The organic, inorganic or hybrid photonic nanomaterials used for this purpose can be tailored in their dimensionality and structure using top-down or bottom-up processes. Thus, model systems for basic research and novel properties can be produced, especially for the development of innovative application concepts.

(a) structure of an a-Si:H/MPEGC60 hybrid solar cell and (b) energy layers (electrochemically determined for fullerene layers) of the individual layers
Absorption spectra of stearic acid layers successively enriched with the amphiphilic fullerene derivative MPEGC60 detected by photothermal deflection spectroscopy. The production methods used determine the absorption spectra of the films via supramolecular symmetry maintenance or refraction.
Personalized medical concept based on biocompatible and biodegradable porous silicon nanostructures

Research topics

  • High-order supramolecular chromophore structures for photonic nanomembranes, organic and hybrid solar cells and organic light-emitting diodes (OLEDs)
  • Silicon nanostructures for photo-driven hydrogen production
  • Molecular sensor membranes for the detection of small molecules in breath or ambient air
  • Biocompatible and biodegradable porous silicon nanostructures for nanomedicine
  • Self-organization of metals in porous matrices

 The research topics of the group are located at the interface between surface chemistry and analytics, photovoltaics, solid state physics and nanotechnology. The interactions between matter and light and ultrasound are in the foreground. For this research the group has at its disposal a series of top-down and bottom-up methods as well as various Langmuir-Blodgett methods and (in situ) spectroscopies.

Top-down and bottom-up photonic nanostructures

Application fields

  • Renewable energy and hydrogen
  • Organic optoelectronics
  • Sensors for the detection of small molecules and chemical substances
  • Porous silicon nanostructures for personalized therapy 
  • Highly sensitive surfaces with localized plasmonic structures for biosensorics and photocatalysis 

The broad application spectrum of the Semiconductor Nanostructures group addresses in particular issues in the fields of (bio)sensor technology, renewable energy and medicine.

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