OAI
OAI is a leading manufacturer of reliable, precision equipment for MEMS, semiconductors, nanotechnology, cleanroom automation, and for UV light measurement.
- 800-843-8259
408-232-0600 - 408-433-9904
- sales@oainet.com
- 464 South Hillview Drive
Milpitas, CA 95035
United States of America
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Testing for Si Solar Cells Using High Performance CCD
EL Imaging Tester
EL Testing for Si Solar Cells using High Performance CCD. The determination of luminescence (photo emissions) in solar cells is an important characterization tool. Typical solar cells often have defects which limit the efficiency or lifetime of a cell. Many of these defects are visualized with Luminescence Imaging. By using this technique, the manufacturing process can be optimized to produce better cells. Luminescence Imaging takes advantage of the radiative inter-band recombination of excited charge carriers in solar cells. The emitted photons can be captured with a sensitive CCD camera to obtain an image of the distribution of the radiative recombination in the cell. This distribution is determined by the local excitation level, allowing the detection of electrical losses, thus mapping the diffusion length of minority carriers as the emitted light is low intensity and in the near infra-red range, the CCD camera has a high sensitivity wavelength from 900 to 1100 nm with little thermal noise. This CCD camera provides excellent resolution of 1024 x 1024 pixels with a large 1μm pixel size, multi-megahertz readout speed, and robust USB 2.0 connectivity. The EL CCD Camera is the ultimate high-performance CCD camera for electroluminescence and photoluminescence imaging for Photovoltaic (PV) Cells and Modules. This camera combines low noise electronics and optimal sensitivity in NIR.
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Calibration Services
For over 25 years, OAI (Optical Associate Inc.), is the leader in NIST traceable calibration of instruments for measuring Ultra Violet (UV) light. Originally designed to meet the demanding needs of the semiconductor wafer fabrication industry, OAI developed the most repeatable NIST traceable calibration in the industry.
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Enhanced UV Light Source
Model 30E
The Model 30E Enhanced UV Lightsource is highly efficient and may be utilized in a variety of applications. Light is collected by an ellipsoidal reflector and focused on an integrating/condensing lens array to produce uniform illumination at the exposure plane. This UV light source is available in various beam sizes up to 24 inches square with output spectra ranging from 220 nm to 450 nm, using the appropriate lamp (included). Output power ranges from 200 watts to 5 kilowatts. All OAI UV Lightsources are easily equipped with quick-change filter assemblies, enabling the user to customize the output spectrum with little effort. Optional remote exhaust fans are available.
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Standard Class AAA Solar Simulator
TriSOL TSS
Essential for testing virtually any material or product that is exposed to sunlight for long or short periods of time, OAI’s low-cost, Standard Solar Simulators deliver highly collimated, uniform light. Depending on configuration, output on these Solar Simulators is rated at 350W -5,000W.These Class AAA Solar Simulators feature OAI’s Advanced Uniform Beam Optics and are available with a choice of air mass filters to reproduce a wide range of solar spectra. For added flexibility, OAI’s proven lens and collimating mirror technology allows for a variety of exposure area sizes. A Class AAA Solar Simulator is an essential tool for manufacturing as well as R&D; it is indispensable in test labs, industry, and in universities. OAI Standard Solar Simulators are used in photobiology, biomedical, solar cell testing, cosmetic testing, and paints & coatings analysis. Based on 35+ years of proven UV light technology, OAI Solar Simulator Systems deliver repeatable, reliable, constant output, and measurement uniformity.
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Exposure Systems
Model 2012AF & 2012SM
The Model 2012AF Flood Exposure System provides a cost-effective method for automated flood exposure. Designed to accommodate wafers from 8” to 300mm, the tool features automated FOUP loading. Mask and substrate changeover can be accomplished quickly and easily adding to both versatility and high-volume throughput of this production tool.The Model 2012SM Automated Edge-bead Exposure System provides a cost-effective method for edge-bead removal using standard shadow mask technology. Designed to accommodate wafers from 8” to 300mm, the tool features automated FOUP loading. Mask and substrate changeover can be accomplished quickly and easily adding to both versatility and high-volume throughput of this production tool.
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Automated I-V/AOI/EL and Sorting System
OAI’s High Performance In-line Automated-I-V Testing, AOI/EL Inspection and Sorting/Binning System for Various Si Solar Cells. The 10000A-I-V System is a unique and reliable I-V testing, AOI/EL Inspection and Sorting / Binning system for testing of Mono, Multi-Si, C-HJT and other full Size (156mm x 156mm) and/or Cut-cell (156mm x 39mm or 156mm x 31.2mm or other custom sizes) Si Solar Cells.
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Light and Energy Meter
Model 656
OAI Model 656 Meter is designed for use with all mask aligners and flood exposure systems. For over 45 years, OAI is a world leader in UV Light & Energy Measurement Instrumentation used for reliable accurate calibrated control of the photolithography processes in the Semiconductor, MEMS, Wafer Packaging and Wafer Bumping Industries.
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Standard & Custom Test Fixtures
Both standard and custom Test Fixtures from OAI enable the user to integrate the solar cell with the I -V tester. Fixture configurations range from from simple hold down devices to temperature-controlled fixtures with front and back side contact. We invite you to contact an OAI Application Engineer for help with your fixture design. With our expert guidance, you can expect maximum performance from your I -V Tester and Solar Simulator.
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Exposure Systems
Model 2000AF & 2000SM
The OAI Model 2000 Exposure Systems may be configured as either an edge-bead exposure system (2000SM) or a flood exposure system (2000AF); both configurations are based on OAI’s proven, time-tested platform.
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Solar Simulators
TriSOL CPV
Concentrating Photovoltaics (CPV) has the promise of producing solar cells with high cell efficiencies, which result in a reduction in the cost of operating a PV module. However, a CPV system requires the integration of CPV solar cells, modules and CPV optics into one efficient system. OAI’s focus is CPV cell testing methodology. The CPV cells can now be tested using OAI’s advanced standalone CPV Simulators for low dose and high dose configurations. The low dose CPV Solar Simulator provides exposure up to 50 Suns, whereas, the high dose CPV Solar Simulator provides exposure up to 1500 Suns. The low and high dose simulators provide exposure in varying Sun concentrations in various beam sizes from 1.5cm x 1.5cm to 7.5cm x 7.5cm, and may be configured with OAI’s I-V Test Systems.
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Custom Solutions for Mask Aligners
OAI offers custom designed solutions built to your unique specification.
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Flash Solar Power Meter
OAI’s Flash Solar Power Meter is a versatile measurement tool used for measuring the irradiance (in Suns) from Flash Solar Simulators. Flash Solar Simulators are commonly used in the production of solar panels. Integrated into the solar cell production line, this meter calibrates the flash solar simulator allowing for constant and repeatable irradiance output. By sampling at speeds up to 4000 Hz, the flash pulse temporal profile can be recorded in the meter’s memory and downloaded to a USB 2.0 port on a PC for further analysis.
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Integrated I-V Test Systems
The OAI Integrated I-V Test System is perfect for R&D as well as production, the OAI Integrated I-V Test System delivers extremely accurate solar cell performance measurement. OAI’s advanced fully Integrated I-V Test System is designed to overcome the limitations of flash testing by providing a highly optimized pulse width and voltage sweep rate to match any type of solar cell’s high capacitance and slow dielectric response speed. As a result, the system produces extremely accurate measurements of solar cell I-V parameters and efficiency while leading to the most accurate test results.
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Tabletop Front & Backside Mask Aligner
Model 200IR
The OAI Model 200IR Mask Aligner is a tabletop system that requires minimal clean room space. It is a cost-effective alternative for R&D or limited scale, pilot production. Utilizing an innovative, air bearing / vacuum chuck leveling system, the substrate is leveled quickly and gently, for parallel photo mask alignment and uniform contact across the wafer during contact exposure. The Model 200IR Mask Aligner is capable of one micron resolution and alignment precision. It has an alignment module which features mask insert sets and quick-change wafer chucks that enable the use of a variety of substrates and masks without requiring tools for reconfiguration. The alignment module incorporates micrometers for X, Y, and z-axis.
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Continuous Wave Solar Power Meter
The OAI Continuous Wave Solar Power Meter is an essential analytical tool for measuring the irradiance (in Suns) of Continuous Wave Solar Simulators. OAI’s Solar Power Meters feature unique features not found in other Solar Meters. This versatile meter can display a wide variety of cell characteristics that include: cell type, window type, cell size, and temperature measurement device type. The OAI Continuous Wave Solar Power Meter can sample and display a continuous reading or peak reading. The Power Meter connects via USB port for data collection, and includes desktop software. With this small, portable, battery-powered meter, numerous production solar simulators can be tested and compared in a short amount of time, leading to greater production line consistency and throughput.
