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Designing photovoltaic cells for indoor energy harvesting systems

: Rühle, K.; Freunek, M.; Reindl, L.M.; Kasemann, M.


Institute of Electrical and Electronics Engineers -IEEE-:
9th International Multi-Conference on Systems, Signals and Devices, SSD 2012 : 20 - 23 March 2012; Enhält 4 Teil-Konferenzen: International Conference on Systems, Analysis & Automatic Control (SAC); International Conference on Power Electrical Systems (PES); International Conference on Communication & Signal Processing (CSP); Conference on Sensors, Circuits & Instrumentation Systems (SCI)
New York, NY: IEEE, 2012
ISBN: 978-1-4673-1589-0
ISBN: 978-1-4673-1590-6
Art. 6197998
International Multi-Conference on Systems, Signals and Devices (SSD) <9, 2012, Chemnitz>
Fraunhofer ISE ()

Recent research focuses on developing photovoltaic cells that are optimized for indoor conditions and therefore suitable for photovoltaic energy harvesting in micro systems. The available conditions for indoor photovoltaic cells are investigated and discussed concerning intensity and spectra. The influence of the parallel and series resistances on the efficiency of crystalline and amorphous Silicon devices with decreasing intensity are discussed and compared to simulations with the two diode model. For low intensities as present indoors (< 1 mW cm -2) the parallel resistance restricts the achievable efficiency and needs therefore to be optimized.