Increased thermoelectric performance by Cl doping in nanostructured AgPb₁₈SbSe_{20鈭?span style='font-style: italic'>x}Cl_x

详细信息    查看全文

• 作者：Qian Zhang ; Yucheng Lan ; Silong Yang ; Feng Cao ; Mengliang Yao ; Cyril Opeil ; David Broido ; Gang Chen ; Zhifeng Ren
• 关键词：Thermoelectrics ; AgPb18SbSe20 ; Cl doping ; Nanoregions
• 刊名：Nano Energy
• 出版年：November, 2013
• 年：2013
• 卷：2
• 期：6
• 页码：1121-1127
• 全文大小：1700 K

文摘

The quaternary AgPb₁₈SbTe₂₀ (LAST) alloy is well known for having low thermal conductivity and high ZT. Nano-precipitates of AgSbTe₂ contribute significantly to the decrease of the lattice thermal conductivity. In this work, Te was completely substituted by the more economically available Se in LAST. Low thermal conductivity was achieved in AgPb₁₈SbSe₂₀ (LASS) made by melting and hot pressing. We subsequently studied the thermoelectric properties of LASS with different dopants, and found Cl was effective in increasing the carrier concentration and power factor, which enhanced ZT to ~1.3 in n-type AgPb₁₈SbSe_19.928Cl_0.072 at about 873 K.