Photovoltaic Technology and Biochar (Professors Kray and Biollaz)

By mid of the century photovoltaics will be the most important energy source according to estimations of the International Energy Agency (IEA). The research group PVT, headed by Prof. Dr. Heide Biollaz and Prof. Dr. Daniel Kray, develops in particular pioneering production processes of solar cells and modules. The focus is set on strategic product development for medium-sized machine construction companies in the field of solar module manufacturing. Currently, a laboratory is under construction where new process technologies will be developed to the point where they can be transferred by companies into the prototype phase. The research activities are supported by comprehensive characterization systems, for example photo- and electroluminescence, REM/STEM and high-resolution confocal microscopy.

Furthermore, the so-called negative emission technologies (NET) are being researched. The focus is on PyCCS (pyrogenic carbon capture and storage), which produces vegetable carbon from biological residues in addition to pyrolysis oils and gases. This can be used in a variety of applications to permanently store carbon from the CO2 in the air and thus actively cool the earth. Of particular interest is the cascade use in agriculture (animal feed, manure treatment, fertiliser additive, soil improvement), which is investigated in the project "FYI: Agriculture 5.0":


Publikationen Forschungsgruppe PVT

(1) Reviewed Journals

Daniel Kray, Soumi Bandyopadhyay, Laura Heuberger, Daniel Weißer, Dzevad Muranovic, Hans Rudert and Roland Einhaus, "N.I.C.E.-wire: Next generation robust eco-friendly bifacial PV modules with high efficiency“, 48th IEEE PVSC, accepted for publication in IEEE Journal of Photovoltaics.


(2) Konferenzbeiträge

- D. Reinwand, P. Wiechers, D. Kray, "NEW DEVICE FOR ACCURATE Measurement of busbarless Bifacial Solar Cells by Using N.I.C.E.™ Technology“, 37th EU-PVSEC 2020, online.

- Dirk Reinwand, Benedikt King, Joerg Schube, Frédéric Madon, Roland Einhaus, Daniel Kray, „Lab-scale Manufacturing of Medium-sized N.I.C.E.TM Modules with High-efficiency Bifacial Silicon Heterojunction Solar Cells“, AIP Conference Proceedings 2156, 020009 (2019);

- D. Reinwand, D. Pysch, N. Bay, J. Burschik, H.H. Kuehnlein, F. Madon, R. Einhaus, A. Brand, V. Arya, B. Smith, D. Richter, D. Kray, „All Copper NICE Modules“, 7th World Conference on Photovoltaic Energy Conversion, June 10-15, 2018, Waikoloa, Hawaii, USA


(3) Sonstige Veröffentlichungen

- Harald Bier, Helmut Gerber, Marcel Huber, Hannes Junginger, Daniel Kray, Jörg Lange, Hansjörg Lerchenmüller, Pål Jahre Nilsen, „EBI Whitepaper - Mit Pflanzenkohle basierten Kohlenstoffsenken dem Klimawandel entgegenwirken“,

Team PVT

Borner, Karoline
Dr. rer. arg. 
  • Room: 3.06
  • Badstraße 24, 77652 Offenburg
Grafmüller, Jannis  M.Sc.
  • Room: 1.01
  • Badstraße 24, 77652 Offenburg
Pönisch, Christoph  M.Sc.

Pönisch, Christoph

  • Room: 1.01
  • Badstraße 24 Offenburg