Isotropic conduction and negative photoconduction in ultrathin PtSe2 films

F. Urban, F. Gity, P. Hurley, N. McEvoy, A. Di Bartolomeo
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引用次数: 18

Abstract

PtSe$_2$ ultrathin films are used as the channel of back-gated field-effect transistors (FETs) that are investigated at different temperatures and under super-continuous white laser irradiation. The temperature-dependent behavior confirms the semiconducting nature of multilayer PtSe$_2$, with p-type conduction, a hole field-effect mobility up to 40 cm2/(Vs) and significant gate modulation. Electrical conduction measured along different directions shows isotropic transport. A reduction of PtSe$_2$ channel conductance is observed under exposure to light. Such negative photoconductivity is explained by a photogating effect caused by photo-charge accumulation in SiO$_2$ and at the Si/SiO$_2$ interface.
超薄PtSe2薄膜的各向同性导电和负光导
利用PtSe$_2$超薄膜作为背控场效应晶体管(fet)的通道,研究了在不同温度和超连续白光照射下的场效应晶体管(fet)。温度相关的行为证实了多层PtSe$_2$的半导体性质,具有p型导电性,空穴场效应迁移率高达40 cm2/(Vs)和显著的栅极调制。沿不同方向测量的电导率显示各向同性传输。在光照下观察到PtSe$_2$通道电导的降低。这种负的光电导率是由SiO$_2$和Si/SiO$_2$界面上的光电荷积累引起的光门效应所解释的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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