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Contacts matter

The open-circuit voltage of CdTe solar cells is limited by energy losses across the device stack. Now, a comprehensive optical and electrical analysis reveals that the high internal voltages of state-of-the-art CdTe-based absorber layers could be translated into electrical power if charge selectivity is increased at contacts.

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Fig. 1: Breakdown of voltage losses in CdTe solar cells with different doping and hole contacts.


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Correspondence to Thomas Unold.

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Competing interests

T.U. is a cofounder of QYB Quantum Yield Berlin GmbH, a company commercializing luminescence measurement instrumentation.

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Unold, T. Contacts matter. Nat Energy 7, 390–391 (2022).

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