Examinando por Autor "Barber, Christopher"

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Assessment of Spectrally Matched Cells
(AESS, 2023-10-02) Gras, Ana; Barber, Christopher; Baur, Carsten; Instituto Nacional de Técnica Aeroespacial (INTA)
The spectral matching criterion for solar cells is crucial for photovoltaic (PV) measurements under simulated sunlight because it helps reducing the uncertainty due to the spectral mismatch correction. It is common practice in both terrestrial and space PV communities to identify spectrally matched cells as those having spectral responsivities identical or at least very similar to each other. A quantitative definition and evaluation of spectrally matched cells is made in this document.
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Electrical performance results of multi-junction space solar cells under high temperature high intensity environmental conditions
(IEEE Aerospace and Electronic Systems Society 13th European Space Power Conference 2023, 2023-10-02) Martínez de Olcoz, A.; Jüngst, G.; Barber, Christopher; Gras, Ana; Baur, Carsten
Missions close to the sun such as BepiColombo or Venus Express always require dedicated testing of solar cells since they operate under non-standard conditions, i.e., High Temperature High Intensity (HTHI). The next mission that falls into the category of HTHI ESA mission is EnVision to Venus, which – in case it will be adopted – is planned to launch in the early 2030s. The space solar cells destined for the PV solar generator are expected to operate at sun intensities of 2 suns and most probably in the temperature range of 130°C-140°C. At INTA-SPASOLAB the temperature coefficient of two cell candidates for the PV solar generator of the ESA EnVision mission, which are a quadruple junction and a triple junction solar cell, have already been determined at 1 sc-AM0 within the range from +25ºC to +100ºC.