Figure 9.

Absorption spectra of co-doped antimony selenide at room temperature. (a) Lu0.04Yb0.04Sb1.92Se3 (b) Lu0.04Er0.04Sb1.92Se3.

Hanifehpour et al. Nanoscale Research Letters 2013 8:141   doi:10.1186/1556-276X-8-141
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