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Tin Diselenide Molecular Precursor for Solution‐Processable Thermoelectric Materials
Author(s) -
Zhang Yu,
Liu Yu,
Lim Khak Ho,
Xing Congcong,
Li Mengyao,
Zhang Ting,
Tang Pengyi,
Arbiol Jordi,
Llorca Jordi,
Ng Ka Ming,
Ibáñez Maria,
Guardia Pablo,
Prato Mirko,
Cadavid Doris,
Cabot Andreu
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201809847
Subject(s) - tin , diselenide , materials science , thermoelectric effect , thermoelectric materials , chemical engineering , metallurgy , composite material , selenium , thermal conductivity , thermodynamics , engineering , physics
In the present work, we detail a fast and simple solution‐based method to synthesize hexagonal SnSe 2 nanoplates (NPLs) and their use to produce crystallographically textured SnSe 2 nanomaterials. We also demonstrate that the same strategy can be used to produce orthorhombic SnSe nanostructures and nanomaterials. NPLs are grown through a screw dislocation‐driven mechanism. This mechanism typically results in pyramidal structures, but we demonstrate here that the growth from multiple dislocations results in flower‐like structures. Crystallographically textured SnSe 2 bulk nanomaterials obtained from the hot pressing of these SnSe 2 structures display highly anisotropic charge and heat transport properties and thermoelectric (TE) figures of merit limited by relatively low electrical conductivities. To improve this parameter, SnSe 2 NPLs are blended here with metal nanoparticles. The electrical conductivities of the blends are significantly improved with respect to bare SnSe 2 NPLs, what translates into a three‐fold increase of the TE Figure of merit, reaching unprecedented ZT values up to 0.65.