Fig. 2 | Nature Communications

Fig. 2

From: Composition change-driven texturing and doping in solution-processed SnSe thermoelectric thin films

Fig. 2

Synthesis of the SnSe ChaM precursor. a UV-Vis absorption spectra of SnSe precursors before and after the purification. The distinctive peak at 350 nm for the purified solution matches the reported absorption band of Sn2Se64− ChaM. b Raman spectra of SnSe precursors before and after the purification. While broad and unidentifiable peaks were observed with unpurified precursor, after purification, several clear peaks were emerged at 191 and 257 cm−1, and at 180 cm−1, which are well matched with the vibration modes of the reported Sn2Se64− and Sn4Se104− ChaMs, respectively. Pink, orange, and turquoise curves represent deconvolution of Raman spectra