Abstract:
:Most crystalline inorganic materials, except for metals and some layer materials, exhibit bad flexibility because of strong ionic or covalent bonds, while amorphous materials usually display poor electrical properties due to structural disorders. Here, we report the simultaneous realization of extraordinary room temperature flexibility and thermoelectric performance in Ag2Te1-x S x -based materials through amorphization. The coexistence of amorphous main phase and crystallites results in exceptional flexibility and ultralow lattice thermal conductivity. Furthermore, the flexible Ag2Te0.6S0.4 glass exhibits a degenerate semiconductor behavior with a room temperature Hall mobility of ~750 cm2 V-1 s-1 at a carrier concentration of 8.6 × 1018 cm-3, which is at least an order of magnitude higher than other amorphous materials, leading to a thermoelectric power factor also an order of magnitude higher than the best amorphous thermoelectric materials known. The in-plane prototype uni-leg thermoelectric generator made from this material demonstrates its potential for flexible thermoelectric device.
journal_name
Sci Advjournal_title
Science advancesauthors
He S,Li Y,Liu L,Jiang Y,Feng J,Zhu W,Zhang J,Dong Z,Deng Y,Luo J,Zhang W,Chen Gdoi
10.1126/sciadv.aaz8423subject
Has Abstractpub_date
2020-04-10 00:00:00pages
eaaz8423issue
15issn
2375-2548pii
aaz8423journal_volume
6pub_type
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