Fraunhofer Institute for Microstructure of Materials and Systems IMWSThe know-how of two Fraunhofer institutes is combined in the Fraunhofer Center for Silicon Photovoltaics (CSP): The Fraunhofer Institute for Microstructure of Materials and Systems IMWS contributes its expertise in the field of the optimization and evaluation of silicon process technologies and module integration. The largest solar research institute in Europe, Fraunhofer ISE, offers its expertise in material production, solar cell and module development and characterization.
The Fraunhofer CSP advises and provides its scientific know-how and high-tech equipment for services.
This equipment and these methods are available at the Fraunhofer CSP:
Crystallization technology
Czochralski EKZ-2700
Single crystals ≤9” (length: 70 cm)
p-type / n-type material
Residual gas analysis
Recharging (optional)
2x Czochralski EKZ-3500
Single crystals ≤9“ (length: 200 cm)
Active crystal cooling
Thin rod drawing machine (DZA 3000)
Thin rod length 240 cm
FZ-14
Single crystals 4” (length: 130 cm)
FZ-35
Single crystals up to 8”
p-type, n-type
VGF-732
G4 Hot-Zone (250 kg)
Residual gas analysis (MKS)
In-situ measurement of the crystallisation rate
Vacuum-induction melting machine (Steremat)
String Ribbon® furnace »Quad«
Crystal machining
Ingot Shaper IS-160 MK-II
High-resolution optics for phase interface monitoring
GD-MS (ThermoScientific)
Analysis of residual contamination within the ppb range
Pulsed source for increased spatial resolution
LPS / PL
Lateral photovoltage scanning with integrated photoluminescence
Micro-structure diagnostics
Metallography, ion and laser beam-based preparation technique
Laser structuring and inkjet printing
Light microscopy (visible, NIR)
Analytical scanning electron microscopy with EDX, EBSD, EBIC
Transmission electron microscopy
Focussed ion beam systems
Time of flight secondary ion mass spectrometry
X-ray photoelectron spectrometry
Scanning probe microscopy
Microprobe electrical characterization
Ultrasound microscopy
Trace analysis
High-resolution ICP magnetic sector field mass spectrometer (ICP-MS)
CP optical emissions spectrometer (ICP-OES)
Microwave digestion system
Sample vaporizing unit
Laser ablation system (LA)
Electrothermal vaporizer (ETV)
Electrical characterisation
Injection-dependent charge carrier life (Si block, wafer)
Charge carrier lifetime mapping (Si block, wafer)
Conductivity measurements (4-point probe method, eddy current method)
Spatially resolved photoluminescence (Si block, wafer, cell)
Spatially resolved electroluminescence in cells
Light-induced local current in cells
Internal and external quantum efficiency of cells
Characterization of passivation layers
Doping profiles based on conductivity measurements
I-V characteristics and parameter determination for cells
Sun simulator
Processing of SiN and Al2O3 passivation layers (PECVD, ALD)
Wafering
Squarer (wire-based) for separation of G4/G5 ingots into blocks 156 mm x 156 mm
Grinding machines for surface and bevel finishing of blocks
IR scanning system for the identification of SiC/SiN inclusions in blocks
Charge carrier lifetime and resistance measurement on blocks for electrical characterization and quality control
Cropper (wire-based) for cutting off the block end pieces
Bandsaw for squaring and cropping mono-ingots and for machining special formats
Wire saws (800 mm and 300 mm load length) for producing multi- and monocrystalline wafers
Precleaning system for detaching the wafer after sawing
Inline fine cleaning for final cleaning of the wafers
Inline measuring system with sorting unit for final wafer inspection and classification
Wafer and cell mechanics
Non-contact thickness and topography measurement of wafers
Mechanical test methods for wafers and cells (e.g. 3 and 4-point bending, double-ring test, ball-ring test)
Mechanical test methods for saw wires
Microhardness test for determining material parameters
Pressure measuring films for load analysis on wafers
Photoelasticity for internal stress analysis in silicon on block and wafer level
Workstations for numerical simulation (finite element method) of mechanical, thermo-mechanical, fracture mechanical and statistical analyses
Module technology
Automated module production line (module sizes 0.7 x 1.2 m² to 2.2 x 2.6 m²) including electroluminescence
Flexible, manual module production (module sizes up to 90 x 70 cm²)
Screen printer
RTP oven
Sample preparation device for producing microsections
Precision testing machine for connection and solder material characterization
Differential scanning calorimeter (DSC)
Peeling test
Wetting balance tester
Wetting angle measuring device
Polymer materials
Differential scanning calorimeter (DSC)
Thermogravimetric analysis (TGA)
FT/IR spectrometer with TGA-FT/IR coupling
Rotational remoter
Dynamic mechanical analysis (DAM)
Thermomechanical analysis (TAM)
Simultaneous thermal analysis (STA)
Push-rod dilatometer
UV-visible spectroscopy
Dielectric analysis (DEA)
Water vapour permeation measuring instrument
Mass spectrometer for gas phase analysis
Soxleth extractor
Automatic dispensing system for conductive adhesive
Universal testing machine
Color measuring instrument
Optical materials and laser processes
Double beam UV-vis NIR photospectrometer for transmission, reflection and scatter (incl. integrating spheres; spectral range 200 nm to 2500 nm)
UV-vis NIR fluorescence spectrometer (incl. life measuring unit and low temperature use; various light sources)
Spectral and spatially resolved electroluminescence within the UV-vis NIR spectral range (Si-CCD and InGaAs-CCD cameras)
Fourier transformation infrared (FTIR) spectrometer (incl. IR microscope and wafer mapping)
Raman spectrometer (incl. temperature chamber; different lasers for excitation at 325 nm, 488 nm, 514 nm, 633 nm and 785 nm; micro and macro-Raman; mapping)
Spectral ellipsometer (spectral range 230 nm to 2400 nm; microspot 60 μm; mapping of samples with up to 20 cm diameter; angle range 10° to 90°)
Optical simulation
Nano and femtosecond laser systems for structuring glass and for photovoltaics-relevant layers
Module characterization
Mechanical static load test station for modules up to 2 m²
Precision universal testing machine for determining the quasi-static load-deformation behavior of materials
Servohydraulic universal testing machine for dynamic characterization of the temperature and speed-dependent load-deformation behavior
Dilatometer for precise measurement of temperature-dependent material expansion
Double ring and four point-bending test for determining the strength of glass
Laser-Doppler vibrometer for component frequency measurement
3D image correlation system for spatially resolved measurement of local displacements and sample elongations
Optical module inspection
Equipment for electroluminescence and thermography imaging
Climatic test cabinets (partly with UV radiation unit)
Damp-heat chambers 3 x 8 m³ within the temperature range from 40°C to 90°C and humidity range from 10 to 90 % r.H.
Climatic test chamber 46 m³ incl. radiation unit for irradiated area up to 6 m²
High-voltage test equipment
High-voltage test station
Micro-ohmmeter for measuring small electrical resistances
Power measurement in the laboratory with class AAA module flasher up to 6 m²
Outdoor power measurement in the field with continuous U-I characteristic recording, temperature and radiation at the module
Environmental measurement technology for direct, indirect and global radiation, air pressure and humidity and wind speed direction
