Wavelength- and temperature-dependent lateral photocurrent measurements were performed on self-assembled PbSePbEuTe quantum-dot superlattices. The comparison of the measured data with absorption spectra calculated within the envelope function approach allows a clear identification of the different features in the photocurrent spectra. The photocurrent signal from the dots is observed over a wide temperature range and no quenching occurs even at 5 K. This indicates a type-II band alignment for the strained PbSePbEuTe quantum-dots.

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