1. Homogeneity and Lifetime Performance of a Tunable Close Match LED Solar Simulator.
- Author
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Kolberg, D., Schubert, F., Klameth, K., and Spinner, D.M.
- Subjects
SOLAR cells ,LIGHT emitting diodes ,WAVELENGTHS ,PHYSICAL measurements ,SIMULATION methods & models ,PERFORMANCE evaluation - Abstract
Abstract: Our commitment is the development of an industrial-grade Class AAA solar simulator based on LED technology . Presently, the LEDSim™ covers the full wavelength range of interest for Si-PV with an extension in the UV, matching AM1.5g from 350nm to 1100nm. To achieve user-defined target spectra we apply 22 different LED packages including several uncommon types. We present a measured spectrum tuned to AM1.5g. It follows from rare lifetime information for some LED species that we need to set a strong focus on reliability determination for our lightheads. In this paper we show how we confirm the lifetime promise of the LED technology with reliability testing. Modern design-for-reliability methods are taken into account in order to increase the reliability of the LEDSim™. Beam shaping and homogeneity are key functions of a sun simulator, and a large effort is made on achieving Class A homogeneity for each wavelength interval as specified in IEC 60904-9 . We are testing different kinds of LED optics and add mirror channels to achieve the best relation between homogeneity and intensity. [Copyright &y& Elsevier]
- Published
- 2012
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