Research / 2020 / Article / Fig 4

Review Article

Defects Engineering with Multiple Dimensions in Thermoelectric Materials

Figure 4

Characterizations for point defects and calculations for complex point defects. (a) Positron lifetime spectrum of Bi1-Cu1-SeO providing evidence for the existence of VBi and VCu [84]. Reproduced with permission from the American Chemical Society. (b) STM images of Sb2Te3 providing evidence for the existence of various kinds of defects [52]. Reproduced with permission from the American Physical Society. (c) Crystal structure of CoSb3 with single Co interstitial and Co interstitial pair, respectively [29]. (d) Calculated defect formation energy as a function of in Co-rich and Sb-rich regions, respectively, providing evidence for the existence of Co interstitial pair complex defect at low temperature [29]. Reproduced with permission from the American Chemical Society.