Welcome to the website of the theoretical nanostructure photovoltaics group @ IEK-5: Photovoltaik, Forschungszentrum Jülich GmbH. Our research is concerned with the development of theoretical descriptions and simulations of novel nanostructure based solar cell devices. For the micro- and mesoscopic picture, our approach relies on quantum-kinetic theories such as NEGF to cover the relevant physical processes of the photovoltaic device operation under full consideration of quantum effects present at the nanoscale. In this way, photogeneration, photocarrier transport and recombination can be treated on equal footing for arbitrary combinations of low-dimensional absorber and conductor components. Applications include, e.g., III-V quantum well solar cells, silicon based quantum well and quantum dot superlattice solar cells, novel tunnel junction architectures for multijunction solar cells and quantum dot fluorescence for spectral concentration devices. More about our research can be found here.


  • 18.6.2014: U. Aeberhard will present an invited talk on "Radiative subband transitions in quantum photovoltaic device architectures" at the 2014 HEMP Workshop to be held on 21./22.7.2014 at Imperial College London.
  • 5.5.2014: Philippe Czaja started as a new doctoral student with focus on the multiscale simulation of nanostructure based solar cell devices.
  • 28.3.2014: U. Aeberhard will present an invited lecture on "Non-equilibrium Green's functions for optoelectronics" at the EU FP-7 NEWLED project workshop, to be held on 8./9.4.2014 at the University of Rome "Tor Vergata".
  • 17.3.2014: Aude Berbezier started her postdoctoral work on phenomenological NEGF models of quantum photovoltaic devices.
  • 4.3.2014: Our paper on the NEGF theory of coherent vs. incoherent light-matter coupling in thin films is now published online in PRB at doi/10.1103/PhysRevB.89.115303
  • 10.10.2013: There is going to be an invited presentation delivered by U. Aeberhard at the 2014 SPIE Photonics West Meeting in San Francisco, USA, on Monday 2/3 at 8.30 AM, under the title" Simulation of absorption, photogeneration and carrier extraction in nanostructure-based and ultra thin-film solar cell devices beyond the classical picture"
  • 7.5.2013: upcoming talks at conferences:
    • 39th IEEE PVSC, Tampa, Florida, talk on Monday 6/17 in Joint Session Areas 1,3&7, "Rigorous simulation of InAlGaAs-InGaAs bulk and quantum well interband tunnel junctions for multi-junction solar cells"
    • NUSOD13, Vancouver, Canada, talk on Monday 8/19 in the afternoon solar cell session, "Photon Green's functions for a consistent theory of absorption and emission in nanostructure-based solar cell devices"
  • 7.2.2013: We have an opening for a Masters thesis project on the simulation of tunnel junctions in thin film silicon multijunction solar cells. For more information, download the pdf file of the announcement, or contact Dr. Bart Pieters, b.pieters@fz-juelich.de.