Integrated series-interconnected thin-film Si solar cells with 6 V and 12 V output voltage

A concept to increase the output voltage of solar cells using monolithically series-interconnected thin-film Si solar cells on SOI-wafers is presented. By using this concept 10 or 20 single cells (active areas: 0.4 cm/sup 2/ or 0.2 cm/sup 2/) have been processed on mono-x-Si SOI-wafers with a 15 /sp...

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Hauptverfasser: Peters, S., Leihkauf, R., Wagemann, H.G.
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description A concept to increase the output voltage of solar cells using monolithically series-interconnected thin-film Si solar cells on SOI-wafers is presented. By using this concept 10 or 20 single cells (active areas: 0.4 cm/sup 2/ or 0.2 cm/sup 2/) have been processed on mono-x-Si SOI-wafers with a 15 /spl mu/m thick device layer. Two different kinds of SOI-material [/spl rho//sub p(Si active)/=(2...3) /spl Omega/cm and (0.1...0.9) /spl Omega/cm] have been used. A special technique permits the insulation of single cells on the burried oxide. Under insolation AM1.5G (100 mW/cm/sup 2/) open circuit voltage of 6.2 V (10 interconnected cells) and 12.6 V (20 interconnected cells), short circuit current densities of 23 mA/cm/sup 2/ and efficiencies up to 11% have been achieved. Measured IQE and emitter doping evaluation can be used to increase the efficiency furthermore.
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ispartof 3rd World Conference onPhotovoltaic Energy Conversion, 2003. Proceedings of, 2003, Vol.2, p.1496-1499 Vol.2
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Crystallization
Doping
Insulation
Integrated circuit interconnections
Integrated circuit reliability
Photovoltaic cells
Semiconductor thin films
Silicon
Substrates
Voltage
title Integrated series-interconnected thin-film Si solar cells with 6 V and 12 V output voltage
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