PVcomB and AVANCIS launch joint MyCIGS research project in order to improve outdoor performance of thin film CIGS solar modules
The energy yields of CIGS modules under real world conditions can be measured on a outdoor testing platform at PVcomB. © HZB
The Competence Centre Thin-Film- and Nanotechnology for Photovoltaics Berlin (PVcomB) is contributing its expertise to improving copper-indium-gallium-sulphide (CIGS) thin-film production in the MyCIGS collaborative research project. CIGS-module manufacturer AVANCIS in Munich is coordinating this project funded by the German Federal Ministry for Economic Affairs and Energy (BMWi). The Carl von Ossietzky University of Oldenburg (Oldenburg University) and Friedrich-Alexander-Universität Erlangen-Nuremberg (FAU) are also partners in the project.
Thin-film solar modules based on copper-indium-gallium-diselenide compounds, or CIGS for short, are highly efficient, economical, and versatile. [1] Thanks to their special properties, they can be employed not just on roofing, but for building cladding as well. Building-integrated Photovoltaics (BIPV) offer diverse new aesthetic configurations for architecture and will find a place on many more surfaces in urban environments.
Improvement in energy yield
Whereas module efficiency has been the focus of previous projects, the MyCIGS project will address how to optimise the energy yield in actual applications, i.e. under realistic conditions of outdoor use. In addition to the efficiency, additional properties such as the temperature coefficients and the power output under conditions of low or diffuse illumination are critical factors. These also play an important role when employing CIGS modules in cladding and buildings.
Expertise at PVcomB in CIGS thin film technology
“We have a lot of experience at PVcomB with characterising and tuning the performance of CIGS thin-films”, explains Dr. Reiner Klenk, in charge of the MyCIGS Project at PVcomB. Using the numerous measurement techniques that have been established at PVcomB, major parameters like temperature coefficients and behaviour under low light conditions can be traced back to physical processes in the solar module. The research project fits in with PVcomB’s strategy of going beyond manufacturing technologies and to also address topics such as encapsulation, reliability, outdoor measurements, and building integration.
New Outdoor Performance research group
As part of the Helmholtz Energy Systems Integration Project for the Future, a new research group headed by Dr. Carolin Ulbrich has just been established. This research group will now be able to measure the energy yields of CIGS modules as well as acquire data sets on local incident radiation and temperature by means of a outdoor testing platform at PVcomB.
Optimised modules
AVANCIS and PVcomB utilise differing technologies and materials in fabricating the individual layers of solar modules. Differing layers made by the project partners can be combined, thereby generating a combinatorial set of baseline data with which the influence of manufacturing technologies on the energy yield can be determined more accurately.
In addition, MyCIGS will benefit from the current PEARL TF-PV solar-era.net project in which PVcomB is augmenting its expertise in defect analysis of CIGS solar modules through collaboration with its German, Dutch, and Austrian institutional research partners, module manufacturers, and solar power station designers.
- Battery research with the HZB X-ray microscopeNew cathode materials are being developed to further increase the capacity of lithium batteries. Multilayer lithium-rich transition metal oxides (LRTMOs) offer particularly high energy density. However, their capacity decreases with each charging cycle due to structural and chemical changes. Using X-ray methods at BESSY II, teams from several Chinese research institutions have now investigated these changes for the first time with highest precision: at the unique X-ray microscope, they were able to observe morphological and structural developments on the nanometre scale and also clarify chemical changes.
- Hydrogen: Breakthrough in alkaline membrane electrolysersA team from the Technical University of Berlin, HZB, IMTEK (University of Freiburg) and Siemens Energy has developed a highly efficient alkaline membrane electrolyser that approaches the performance of established PEM electrolysers. What makes this achievement remarkable is the use of inexpensive nickel compounds for the anode catalyst, replacing costly and rare iridium. At BESSY II, the team was able to elucidate the catalytic processes in detail using operando measurements, and a theory team (USA, Singapore) provided a consistent molecular description. In Freiburg, prototype cells were built using a new coating process and tested in operation. The results have been published in the prestigious journal Nature Catalysis.
- Rutger Schlatmann re-elected as ETIP PV ChairThe European Technology and Innovation Platform for Photovoltaics (ETIP PV) was created by the European Commission in order to promote photovoltaic technologies and industries in Europe. Now, the ETIP PV Steering Committee elected a new Chair, as well as two Vice-Chairs for the term 2024 – 2026. Rutger Schlatmann, head of the division Solar Energy at the HZB, and professor at HTW Berlin, was re-elected as the ETIP PV Chair.