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. 2015 Jun 4;5:10978. doi: 10.1038/srep10978

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A) a digital picture of the Sb-Se precursor solutions with varied Se/Sb ratios (value marked on the vial). B) Multi-peak fitting of the peaks obtained from the Sb-Se precursor solution with a Se/Sb molar ratio of 6. C) Raman spectra of Sb-Se precursor solutions with Se/Sb molar ratios ranging from 3.5 to 6. D) The integrated intensities of the peaks for the Sb-Se complex (•), and the peaks for the Se chain (235 cm⁻¹) and Se₈ ring (260 cm⁻¹) (■) as a function of the Se/Sb molar ratio.