Semiconductor glass with superior flexibility and high room temperature thermoelectric performance.

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 Adv

journal_title

Science advances

authors

He S,Li Y,Liu L,Jiang Y,Feng J,Zhu W,Zhang J,Dong Z,Deng Y,Luo J,Zhang W,Chen G

doi

10.1126/sciadv.aaz8423

subject

Has Abstract

pub_date

2020-04-10 00:00:00

pages

eaaz8423

issue

15

issn

2375-2548

pii

aaz8423

journal_volume

6

pub_type

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