Figure 1From: Lu3+/Yb3+ and Lu3+/Er3+ co-doped antimony selenide nanomaterials: synthesis, characterization, and electrical, thermoelectrical, and optical propertiesPowder XRD pattern of Lu x Yb x Sb2âxSe 3 . Curve a: x = 0.0, curve b: x = 0.04, and curve c = impurity phase.Back to article page