Abstract
Photoluminescence (PL) of CdS/CdTe thin films prepared with and without oxygen has been studied. A donor‐acceptor transition (1.521 eV at 4.2 K) was observed only at the CdS/CdTe interface of samples prepared in an oxygen ambient. Together with the observed relative strength of the deep acceptor level, Ev+0.15 eV, it is possible to correlate the PL data with the type of conduction in CdTe films prepared in different atmospheres and the shallow‐ or deep‐junction behavior of the CdS/CdTe solar cell.

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