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원자제어 저차원 전자계 연구단
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Deterministic Two-Dimensional Polymorphism Growth of Hexagonal n-type SnS2 and Orthorhombic p-type SnS crystals Highly Cited Paper

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Title
Deterministic Two-Dimensional Polymorphism Growth of Hexagonal n-type SnS2 and Orthorhombic p-type SnS crystals
Author(s)
Ji-Hoon Ahn; Myoung-Jae Lee; Hoseok Heo; Ji Ho Sung; Kyungwook Kim; Hyein Hwang; Moon-Ho Jo
Publication Date
2015-06
Journal
NANO LETTERS, v.15, no.6, pp.3703 - 3708
Publisher
AMER CHEMICAL SOC
Abstract
van der Waals layered materials have large crystal anisotropy and crystallize spontaneously into two-dimensional (2D) morphologies. Two-dimensional materials with hexagonal lattices are emerging 2D confined electronic systems at the limit of one or three atom thickness. Often these 2D lattices also form orthorhombic symmetries, but these materials have not been extensively investigated, mainly due to thermodynamic instability during crystal growth. Here, we show controlled polymorphic growth of 2D tin-sulfide crystals of either hexagonal SnS2 or orthorhombic SnS. Addition of H2 during the growth reaction enables selective determination of either n-type SnS2 or p-type SnS 2D crystal of dissimilar energy band gap of 2.77 eV (SnS2) or 1.26 eV (SnS) as a final product. Based on this synthetic 2D polymorphism of p−n crystals, we also demonstrate p−n heterojunctions for rectifiers and photovoltaic cells, and complementary inverters.
URI
https://pr.ibs.re.kr/handle/8788114/1662
ISSN
1530-6984
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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