2017
DOI: 10.1021/acs.chemmater.7b01343
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GeAs2: A IV–V Group Two-Dimensional Semiconductor with Ultralow Thermal Conductivity and High Thermoelectric Efficiency

Abstract: The successful demonstration of SnSe single crystals as promising thermoelectric materials highlights alternative strategies to nanostructuring for achieving high thermoelectric efficiency. It stimulates us to screen the periodic table for earth-abundant materials with layered crystal structures and intrinsically low thermal conductivity. GeAs 2 is made from group IV and V elements within the same period as selenium, and it exhibits anisotropic and anharmonic bonding character similar to the IV−VI group compou… Show more

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Cited by 86 publications
(101 citation statements)
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“…Unlike the weak direction dependence in thermal conductivity of SnSe, anisotropic and low thermal conductivity was presented in GeAs 2 , a semiconductor formed from group IV and V elements. At room temperature, thermal conductivity of 6.03 W m −1 K −1 is reported along a ‐axis, while a much lower value of 0.68 W m −1 K −1 along the b ‐axis …”
Section: Thermal Properties In 2d Semiconductorsmentioning
confidence: 73%
“…Unlike the weak direction dependence in thermal conductivity of SnSe, anisotropic and low thermal conductivity was presented in GeAs 2 , a semiconductor formed from group IV and V elements. At room temperature, thermal conductivity of 6.03 W m −1 K −1 is reported along a ‐axis, while a much lower value of 0.68 W m −1 K −1 along the b ‐axis …”
Section: Thermal Properties In 2d Semiconductorsmentioning
confidence: 73%
“…Layered compounds have garnered increasing attention in recent years after the discovery of graphene, a single layer of graphite . Layered tetrel‐pnictides are versatile materials, displaying several interesting properties, such as superconductivity at 1.3 K in NaSn 2 As 2 and ultra‐low thermal conductivity in metallic Li 1− x Sn 2+ x As 2 .…”
Section: Introductionmentioning
confidence: 99%
“…Layered tin phosphide, Sn 4 P 3 , has been studied for lithium‐ion and sodium‐ion battery applications and has been proven to be a promising material . Pnictides of lighter tetrels such as GeAs, SiAs, GeP, SiP, GeAs 2 , and SiAs 2 have been gaining interest in the field of thermoelectrics, photovoltaics, water splitting, and optics owing to their anisotropic nature, weak interlayer interactions, relatively small band gaps (<2 eV), and potential for tuning of properties through doping and strain …”
Section: Introductionmentioning
confidence: 99%
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