图4. (GeTe)nBi2Te3系列样品随温度变化的功率因子, 插图为723 K时系列样品的功率因子与载流子浓度的关系
Fig. 4. Temperature dependence of the power factor for (GeTe)nBi2Te3 compounds with inset showing the corresponding relationship between carrier concentration and power factor at 723 K