Department Structure and Dynamics of Energy Materials
Instrumentation and Laboratory
Instrumentation at BESSY II
| Station | Contact | |
|---|---|---|
| CryoEXAFS | CryoEXAFS | Götz Schuck |
| KMC-2 Diffraction | KMC-2 Diffraction | Daniel Többens |
| KMC-2 XANES | XANES, EXAFS, myXANES, myEXAFS | Götz Schuck |
| mySpot | Micro-XANES, -EXAFS, -fluorescence | Ivo Zizak |
X-Ray CoreLab
The laboratory operates instruments for various X-Ray diffraction methods at HZB locations Adlershof (WCR) and Wannsee (LMC) and makes them available to all interested co-workers of HZB as well as for guests.
Laboratory for crystallographic materials research for solar energy conversion
- synthesis of powder reference samples of chalcogenide compound semiconductors by solid state reaction (fig. 1)
- synthesis of single crystals of novel PV materials (fig.2)
- synthesis of hybrid-perovskites
- chemical analysis of the synthesized material by WDX spectroscopy using an electron microprobe system
(Freie Universitaet Berlin, Institute of Geological Sciences) - basic structural analysis of the synthesized materials by X-ray powder diffraction
Fig. 1: left: sealing of evacuated silica tubes; middle: elements loaded into a graphite boat within a silica tube; right: synthesis in a 1-zone furnace
Fig. 2: MAPbBr3 single crystals, grown from solution (left) and defect adamantine CuAlSnS4 (center) and CuGaGeS4, both grown by chemical vapour transport (CVT)
UV-Vis laboratory
At the UV-Vis laboratory, diffuse reflectance spectroscopy measurements in the ultra-violet and visible spectrum are done. For this a Perkin Elmer Lambda 750S equipped with a “praying mantis” stage, specifically designed for the measurements of powders with low signal is available, with sample holders for small and very small amounts of powder.
Figures: Perkin Elmer Lambda 750S (left), "Praying mantis" stage (center), two types of powder holders (right)
Optical Microscopy
A modern optical microscope Keyence VHX970 with Objective ZS 20 x 100 is mostly used for the selection of individual high-quality single crystals suitable for further analysis.
Figure: Optical microscope Keyence VHX970 (left), Ag2FeSnS4 surrounded by SnS2 single crystals (center), Sb2Se3 polycrystalline bulk (right)