Complex alloying effect on thermoelectric transport properties of Cu2Ge(Se1−xTex)3 Project supported by the National Natural Science Foundation of China (Grant Nos. 51672270, 11674040, and 11404044), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH016), and the Project for Fundamental and Frontier Research in Chongqing City (Grant No. CSTC2015JCYJBX0026). |
SEM images for Cu2GeSe2.7Te0.3 [(a) and (b)] and Cu2GeSe1.8Te1.2 [(c) and (d)]. |