Virtual tours: Experience the HZB in 360 degrees!
Unfortunately, due to Corona, we are currently unable to receive groups of visitors at HZB and guide them through our centre. Despite Corona, we would like to provide you with insights into HZB. Simply follow our 360-degree tours and experience how we conduct research at the BESSY II accelerator. Further tours are being planned.
"Make yourself comfortable and start your own virtual tour through our world of research! We invite you to move through the 360-degree worlds and pause at one station or another to discover something new," says Sandra Fischer from the Communications Department. She designed and realised the tours together with an external partner.
The first tour is through the BESSY II accelerator facility. Further tours, also at the Wannsee site, are being planned. "With this offer, we want to remain open to interested people even in times of a pandemic and arouse curiosity about the world of science."
Tour through the BESSY II accelerator: Follow the path of light
Have you always wanted to walk through an accelerator? The tours "The Path of Light" and "The Experiment" both start in the heart of BESSY II, the control room. Go to the place where electrons race through and emit light at almost the speed of light - the storage ring tunnel. There you will see the effort that has to be made to generate the coveted light. You can experience all the things we can explore with this light in the tour "The Experiment".
Here you get to the tour. We hope you enjoy it!
Note for our cooperation partners at BESSY II:
360-degree views ("spherical panoramas") of various beamlines are available in the media library. You are welcome to use these to explain your work at BESSY II (e.g. in lectures or for groups of visitors). If you have any questions, please contact Sandra Fischer.
- Magnetic imaging: Micro-flowers increase the local magnetic fieldMaterials with magnetic nanostructures have many potential applications such as in spintronics. To explore such materials, nanoscale magnetic-sensitive imaging techniques are very useful, but up to now only weak magnetic fields could be applied during the imaging process. Now an international collaboration led by Dr. Sergio Valencia, HZB, has developed an approach that overcomes this limitation. The team designed tiny magnetic flux concentrators (MFCs), into which the sample is placed. The geometry of the MFCs resembles a flower with a number of petals which focus the applied magnetic field into its center. This greatly expands the magnetic field range available during imaging, and so the range of magnetic systems that can be investigated. The micro-flowers, enhancing magnetic fields locally, can find application in different nanometric magnetic microscopy techniques.
- CIGS-perovskite tandem cell achieves record efficiency of 25.5 %A Berlin-based team from HZB and Center for the Science of Materials Berlin (CSMB) at the Humboldt-Universität zu Berlin has set a new record for a tandem solar cell. Using a combination of a CIGS semiconductor layer and perovskite, along with several optimised intermediate layers, they were able to convert 25.5% of sunlight into electrical energy. The previous record for this combination of materials and this size of cell stood at 24.6%. The new record has been certified and is visible in the prestigious Solar Cell Efficiency Tables (the "Green Tables"), which serve as the definitive ledger for the global photovoltaic community.
- Disorder creates new properties in compound semiconductorsAn international research team has demonstrated that the intrinsic disorder of the compound semiconductor CuInSnS₄ can be exploited to influence its optical properties. While the atomic vibrations also sense the local disorder, their response is averaged over many different local environments and therefore appear isotropic, as expected for a cubic crystal. In contrast, the optical excitations, known as excitons, are much more sensitive to the local arrangement of atoms. Surprisingly, they show a direction-dependent optical response even though the average crystal structure is cubic. These findings shed new light on the relationship between disorder and material properties, opening up new options for targeted 'disorder engineering' in optoelectronic and photocatalytic devices.