TY - JOUR
T1 - Thickness-Dependent Carrier Transport Characteristics of a New 2D Elemental Semiconductor
T2 - Black Arsenic
AU - Zhong, Mianzeng
AU - Xia, Qinglin
AU - Pan, Longfei
AU - Liu, Yuqing
AU - Chen, Yabin
AU - Deng, Hui Xiong
AU - Li, Jingbo
AU - Wei, Zhongming
N1 - Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/10/24
Y1 - 2018/10/24
N2 - 2D elemental layered crystals, such as graphene and black phosphorus (B-P), have received tremendous attentions due to their rich physical and chemical properties. In the applications of nanoelectronic devices, graphene shows super high electronic mobility, but it lacks bandgap which impedes development in logical devices. As an alternative, B-P shows high mobility of up to about 1000 cm2 V−1 s−1. However, B-P is very unstable and degrades rapidly in ambient conditions. Orthorhombic arsenic (black arsenic; b-As) is the “cousin” of B-P; theoretical prediction shows that b-As also has excellent physical and chemical properties, but there is almost no experimental report on b-As. Herein, it is reported on the unique transport characteristics and stability of monolayer and few-layer b-As crystals which are exfoliated from the natural mineral. The properties of field-effect transistors (FETs) strongly depend on the thickness of crystals. In the monolayer limit, the performance shows relatively high carrier mobilities and large on/off ratios. Moreover, the b-As crystals exhibit a relatively good ambient stability. The few-layer arsenic based FET still function after exposure to air for about one month. Therefore, b-As is expected to be a promising 2D material candidate in nanoelectronic devices.
AB - 2D elemental layered crystals, such as graphene and black phosphorus (B-P), have received tremendous attentions due to their rich physical and chemical properties. In the applications of nanoelectronic devices, graphene shows super high electronic mobility, but it lacks bandgap which impedes development in logical devices. As an alternative, B-P shows high mobility of up to about 1000 cm2 V−1 s−1. However, B-P is very unstable and degrades rapidly in ambient conditions. Orthorhombic arsenic (black arsenic; b-As) is the “cousin” of B-P; theoretical prediction shows that b-As also has excellent physical and chemical properties, but there is almost no experimental report on b-As. Herein, it is reported on the unique transport characteristics and stability of monolayer and few-layer b-As crystals which are exfoliated from the natural mineral. The properties of field-effect transistors (FETs) strongly depend on the thickness of crystals. In the monolayer limit, the performance shows relatively high carrier mobilities and large on/off ratios. Moreover, the b-As crystals exhibit a relatively good ambient stability. The few-layer arsenic based FET still function after exposure to air for about one month. Therefore, b-As is expected to be a promising 2D material candidate in nanoelectronic devices.
KW - black arsenic
KW - field-effects transistors
KW - monolayers
KW - thickness-dependent properties
UR - http://www.scopus.com/inward/record.url?scp=85052817471&partnerID=8YFLogxK
U2 - 10.1002/adfm.201802581
DO - 10.1002/adfm.201802581
M3 - Article
AN - SCOPUS:85052817471
SN - 1616-301X
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 43
M1 - 1802581
ER -