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Spectroscopy47Mesh AttenuatorsA series of mesh attenuators are available to reduce the beam power. Most photovoltaic applications ideally want to work with one AM1.5G sun (1000 W/m2). However, for example, a 4 x 4 inch system has approximately 3 suns output. Attenuating the power by 2/3 is not practical with current control alone. Adding a mesh attenuator, combined with !ne-tuning of the current is the best way to accomplish achieving an output of one sun. Attenuators with 23%, 33%, 40%, 50%, 63% and 79% attenuation are available.UV VersionThese simulators closely match the ultraviolet portion of the solar spectrum. This$system contains the same housing, optics, power supply and lamp as the full spectrum simulators, but instead of a high re"ective Al mirror they use a dichroic mirror which re"ects 280 to 400 nm while minimizing the VIS and IR output. Optional UV blocking !lters can be added to further shape the spectral output.Low cost Solar Simulator, 25, 35 and 40 mm beam diameter????????Low-cost alternative????????Collimated beam up to 40 mm diameter????????Output power of up to 2 suns????????UV version availableThese solar simulators are a low cost alternative if a large illuminated area is not required. Sources can again be combined with an air mass !lter to provide a close spectral match to sunlight.Class AAA or ABA?According to the American ASTM E927-5 and European ICE 60904-9 standards, solar simulators are tested for 3 different criteria and classi!ed for each criterion into class A, B, or C. This results in a classi!cation of the complete solar simulator, for example AAA or ABA. The criteria being tested are spectral match, non-uniformity and temporal stability of the light.The main application of our solar simulator systems is the evaluation of solar cell performance. For this type of measurements, the solar simulator is integrated into an IV measuring station. For setting the correct irradiance value we offer calibrated reference cells.Further applications are the determination of plant growth, characterization of transparent components like sun protection glasses or the development of skin care products.

Spectroscopy48www.lotoriel.co.ukComplete IV curve characterisation systemSolar simulators and probe stations are combined with high quality measurement instruments and the ReRa Tracer software. This has resulted in a complete IV curve measurement system.FeaturesComplete solar cell IV-curve tracing and analysisIEC standards compliantReference cell corrected metrologyWide range of solar simulators and Source-Meters controlledFreely downloadable extension plug-ins add new instruments controlled and analysis techniquesDark curve and temperature dependence analysisDatabase connectors for SQL server and MySQLNumerous solar cell material speci!c models includedReRa Tracer Software????????IEC standards compliant????????Reference cell corrected metrology????????Correction to standard test conditions????????Wide range of solar simulators and Source-Meters controlled????????Dark curve and temperature dependence analysis????????Database connectors for SQL server and MySQL????????Numerous solar cell material speci!c models includedTest Stations????????Standard current ranges to 5A (10 A on special order)????????1x1 mm to 156x156 mm stations standard????????Pneumatic actuated stations for the manufacturing "oor????????Temperature controlled and vacuum chuck stations????????Probes spaced so as to equalize current density within the$solar cell????????Low shadowing, spring loaded probes????????Kelvin probe (four point measurements) methodology$standardIV Curve Measurement