Optimization of the Stabilized Efficiency of Thin-Film Tandem Solar Cells through Power Matching

In thin-film tandem solar cells the sub cells are usually connected in series. The inherent current-limitation needs to be considered when optimizing the efficiency, but furthermore leads to challenges when comparing the sub cells performances of differently matched tandem cells. We have introduced the PowerMatching-Method that characterizes the device not only under one standard spectrum but under various spectral distributions. By this method, the same tandem cell can be characterized under various matching conditions. Based on simulations, we demonstrate a convenient way to compare differently matched tandem solar cells. Moreover, our simulations show that the method allows distinguishing between matching effects and changes in the sub-cells properties, e.g. changes due to the Staebler-Wronski-Effect.

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Degradation of tandem solar cells: Separating matching effects from Staebler-Wronski Effect using the Power-Matching-Method

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Ulbrich

Pieters

et al. 2014

2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)

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Optimization of the Stabilized Efficiency of Thin-Film Tandem Solar Cells through Power Matching

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Degradation of tandem solar cells: Separating matching effects from Staebler-Wronski Effect using the Power-Matching-Method

Degradation of tandem solar cells: Separating matching effects from Staebler-Wronski Effect using the Power-Matching-Method

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