Vapor-solid synthesis and enhanced thermoelectric properties of non-planar bismuth selenide nanoplates on graphene substrate

被引：16

作者：

Baitimirova, Margarita ^{[1
,2
]}

Andzane, Jana ^{[1
]}

Petersons, Gvido ^{[1
,2
]}

Meija, Raimonds ^{[1
]}

Poplausks, Raimonds ^{[1
]}

Romanova, Marina ^{[1
]}

Erts, Donats ^{[1
,2
]}

机构：

[1] Univ Latvia, Inst Chem Phys, 19 Raina Blvd, LV-1586 Riga, Latvia

[2] Univ Latvia, Dept Chem, 19 Raina Blvd, LV-1586 Riga, Latvia

来源：

JOURNAL OF MATERIALS SCIENCE | 2016年 / 51卷 / 17期

关键词：

GROWTH; DEPOSITION; BI2TE3; FILMS;

D O I：

10.1007/s10853-016-0097-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, stoichiometric separate bismuth selenide (Bi2Se3) nanoplates and continuous Bi2Se3 coatings are synthesized on graphene substrate by catalyst-free vapor-solid deposition method. The orientation of synthesized nanoplates relative to the substrate surface varies from heteroepitaxial (planar) to oriented under different angles (non-planar). The non-planar growth of the nanoplates was achieved for the first time by short-term carrier inert gas flow in certain temperature interval of the synthesis process. The crystallographic growth directions of non-planar nanoplates were determined from HRTEM images as well as estimated from the slope angles of non-planar nanoplates. Bi2Se3 coatings consisting of combination of planar and non-planar nanoplates exhibit significantly enhanced in comparison with coating consisting of only planar coalescent Bi2Se3 nanoplates thermoelectric properties. Demonstrated graphene/Bi2Se3/graphene devices may find applications in thermoelectric and photo-detection sensors.

引用

页码：8224 / 8232

页数：9

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