Homogeneity and Lifetime Performance of a Tunable Close Match LED Solar Simulator

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• 作者：D. Kolberg ; F. Schubert ; K. Klameth ; D.M. Spinner
• 关键词：Solar Simulator ; Homogeneity ; Spectrum ; Reliability ; LED ; Linear Driver ; Characterization
• 刊名：Energy Procedia
• 出版年：2012
• 出版时间：2012
• 年：2012
• 卷：27
• 期：Complete
• 页码：306-311
• 全文大小：1202 K

文摘

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 AM1.5 g from 350 nm to 1100 nm. To achieve user-defined target spectra we apply 22 different LED packages including several uncommon types. We present a measured spectrum tuned to AM1.5 g. 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.