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Geräte
Charakterisierung
EQE
AG Goldschmidt intern The EQE Setup (also IPCE) is able to perform multiple measurements such as Dark JV, IPCE, EL-PL-Spectrum, Pulsed EL, 4-Point Probe (all steady state) or Transient Photo Response, Electrical Impendance Spectroscopy and Charge Extraction by Linearly Increasing Voltage (all transient).
Sun Simulator IV
AG Goldschmidt intern The exceeding Class A Sun Simulator offers a high precision spectral mismatch of < 5%. Typical measurements performed are JV scans and maximum powerpoint tracking.
Hall Setup
AG Goldschmidt intern The Hall Setup does measurements of resistance of thin film using the Van der Pauw method. It allows the caracterization of semiconductor devices regarding their electric transport properties, like the Hall mobility, Charge Carrier Concentration, Resistivity and the Seebeck Coefficient.
Hyperspectral Imaging
Foto: Jan Christoph Goldschmidt This Hyperspectral Imager can be used to collect a full spectrum of every pixel and to map Bandgap variations, Material composition differences, Phase segregation, Crystallinity variations and defects. Also PL and EL mappings can be done for example to determine the QFLS.
Photoluminescence quantum yield (PLQY)
AG Goldschmidt intern This system can be used to quantify absolute electro- and photoluminescence fluxes of thin film absorbers, layer stacks or complete devices under various operating conditions.
Ellipsometer
AG Goldschmidt intern An ellipsometer is used to precisely measure thin-film optical and physical properties. It works by shining polarized light onto a surface and analyzing how the polarization changes after reflection. Therefore it can be used to map the uniformity across the sample, characterize surface roughness or to identify material compositions and bandgap shifts.
Time Resolved Photoluminescence
AG Goldschmidt intern This technology can be used to understand the behaviour of charges over time after photoexcitation. The TRPL measures how fast a material emits light, which gives direct insight into recombination dynamics.
Ageing Setups
AG Goldschmidt intern 
AG Goldschmidt intern Our light soaking chambers consist of multiple arrays of LED’s to achieve a high level of homogeneity. In addition we are using a self-built temperature station to have full control over the temperatur during the measurements and different sensors to check the humidity, O2 levels and the luminous intensity.
UV-Vis
AG Goldschmidt intern The UV-Vis can measure the reflection and transmission of a material and provides us with information about the absorption behaviour. It also allows us to extract the bandgap from the semiconductors.
Herstellung
Glovebox for wet-chemical deposition and spin-coating
AG Goldschmidt intern These Gloveboxes are used during the production of our perovskite solar cells. Among other things, the spin coating process takes place there.
Evaporation System
AG Goldschmidt intern 
AG Goldschmidt intern Our new glovebox-integrated thin-film deposition cluster enables high-precision fabrication of perovskite solar cells under fully controlled inert conditions. The system combines thermal evaporation and sputtering chambers with an automated multi-level load-lock, allowing sample transfer without breaking vacuum. Direct integration with our X-ante transfer chamber and ALD systems supports advanced multilayer device architectures and fully reproducible research workflows.
Atomic Layer Deposition
AG Goldschmidt intern Atomic layer deposition (ALD) is a thin-film technique that uses sequential, self-limiting surface reactions to deposit materials with sub-nanometer thickness control and excellent conformality. It is commonly used to create high-quality passivation layers buffer layers, and barrier coatings that improve device efficiency and stability.
Fume Hood and Heat Press
AG Goldschmidt intern The heat press is mostly used for carbon electrodes to apply controlled temperature and pressure. It helps to achieve a dense and well-contacted carbon layer, that improves the conductivity.
Wet-chemical Fume Hood for Substrate Cleaning
AG Goldschmidt intern A wet-chemical fume hood for substrate cleaning allows the performance of processes like acid/base cleaning, etching and rinsing substrates.
Spincoating Robot
AG Goldschmidt intern This automated system deposits thin, uniform films on substrates by dispensing a solution and spinning it at controlled speeds. With the help of the spinbot, our solar cells reach a high reproducibility and uniform thickness.