Journal
CRYSTALS
Volume 11, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/cryst11091016
Keywords
crystal structure; thermoelectric property; Seebeck coefficient; thermal conductivity
Funding
- National Natural Science Foundation of China [21601021]
- Start-Up Foundation of Shandong Jiaotong University [BS2018027]
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The study investigates the crystal structure and thermoelectric properties of Sn-doped AgBiSe2, revealing that Ag1-x/2Bi1-x/2SnxSe2 compounds have low lattice thermal conductivity and potential as lead-free thermoelectric materials.
AgBiSe2, which exhibits complex structural phase transition behavior, has recently been considered as a potential thermoelectric material due to its intrinsically low thermal conductivity. In this work, we investigate the crystal structure of Sn-doped AgBiSe2 through powder X-ray diffraction and differential scanning calorimetry measurements. A stable cubic Ag1-x/2Bi1-x/2SnxSe2 phase can be obtained at room temperature when the value of x is larger than 0.2. In addition, the thermoelectric properties of Ag1-x/2Bi1-x/2SnxSe2 (x = 0.2, 0.25, 0.3, 0.35) are investigated, revealing that Ag1-x/2Bi1-x/2SnxSe2 compounds are intrinsic semiconductors with a low lattice thermal conductivity. This work provides new insights into the crystal structure adjustment of AgBiSe2 and shows that Ag1-x/2Bi1-x/2SnxSe2 is a potentially lead-free thermoelectric material candidate.
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