In the past several decades,silicon germanium(SiGe)bulk alloys have been a research focus in addressing the current global energy crisis and environmental pollution problems due to their excellent high-temperature the...In the past several decades,silicon germanium(SiGe)bulk alloys have been a research focus in addressing the current global energy crisis and environmental pollution problems due to their excellent high-temperature thermoelectric properties.In this study,n-type Si_(80)Ge_(20)P_(2)Sn_(x)bulk alloys were fabricated by spark plasma sintering(SPS)to investigate the effect of Sn incorporation.In addition,the optimal sintering conditions and Sn content were determined.The introduction of Sn improves the electrical conductivity and power factor of the n-type SiGe bulk alloys due to the doping and composite effects.Particularly,the Si_(80)Ge_(20)P_(2)Sn_(2)bulk alloy could reach a high figure of merit(ZT)value of~1.26 at 800℃.Thus,this work provides a quick preparation method for obtaining n-type SiGe bulk alloys with outstanding thermoelectric properties by incorporating Sn,which is favorable for large-scale production.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.12104408,11704340,11804305,12004341 and 12004342)China Postdoctoral Science Foundation(Nos.2020M672266 and 2021M702956)+1 种基金the State Key Laboratory of Metastable Materials Science and Technology in Yanshan University(No.202010)the Scientific and Technology project in Henan Province(No.202102210198)
文摘In the past several decades,silicon germanium(SiGe)bulk alloys have been a research focus in addressing the current global energy crisis and environmental pollution problems due to their excellent high-temperature thermoelectric properties.In this study,n-type Si_(80)Ge_(20)P_(2)Sn_(x)bulk alloys were fabricated by spark plasma sintering(SPS)to investigate the effect of Sn incorporation.In addition,the optimal sintering conditions and Sn content were determined.The introduction of Sn improves the electrical conductivity and power factor of the n-type SiGe bulk alloys due to the doping and composite effects.Particularly,the Si_(80)Ge_(20)P_(2)Sn_(2)bulk alloy could reach a high figure of merit(ZT)value of~1.26 at 800℃.Thus,this work provides a quick preparation method for obtaining n-type SiGe bulk alloys with outstanding thermoelectric properties by incorporating Sn,which is favorable for large-scale production.
