Helmholtz-Zentrum Berlin für Materialien und Energie

The Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) is a research center of the German Helmholtz Society. Its mission is to understand, improve, and develop new energy materials in order to master challenges such as the energy transition. By its central large-scale research facilities HZB undertakes fundamental investigations for solar cells, solar fuels, thermo electrics, and materials for future, energy-efficient information technologies. Moreover, it operates several corelabs providing a high-level infrastructure for internal and external users not only for fundamental research but also for developments, analytics and services at an applied level.

The corelab PVcomB, the Competence centre for thin-film and nanotechnologies for photovoltaics, is the technology transfer institute of HZB. Among others, it operates a complex infrastructure for preparation and analysis of lab scale CIGS solar modules (30×30 cm2 baseline) and 6” heterojunction silicon solar cells. In close collaboration with other institutes at HZB, PVcomB also focuses on the development of high-efficient multijunction devices in combination of silicon or CIGS with perovskites. Research on PV systems and the specific aspects of building integration close the gap to the final applications of photovoltaics.


Within the PEARL Project PVcomB is carrying out an in-depth analysis of performance-influencing defects in CIGS solar cells and modules. Both materials and lab scale devices are analyzed using several imaging technologies like electro- and photoluminescence, thermography and Raman in correlation to the electrical properties of the samples. Both, indoor and outdoor analytics are used to get a detailed picture of relevant defects, visible in EL and with influence on the device performance. 


Björn Rau, bjoern.rau@helmholtz-berlin.de