Electrolyte dependence of transport properties of SrTiO3 electric double layer transistors
Electrolyte dependence of transport properties of SrTiO3 electric double layer transistors
复制标题
DOI：
10.7567/jjap.56.051101
复制
发表时间：
2017-05-01
影响因子：
1.5
通讯作者：
Ueno, Kazunori
中科院分区：
文献类型：
--
作者：
Sato, Yohei;Doi, Kiyomasa;Ueno, Kazunori
我们报告的SrTiO 3双电层晶体管（EDLTs）的输运性质的电解质依赖。作为电解质，使用1-乙基-3-甲基咪唑鎓（EMIM）双（三氟甲基磺酰基）酰亚胺（TFSI）、EMIM二氰胺（DCA）、N，N-二乙基-N-甲基-N-（2-甲氧基乙基）铵（DEME）TFSI、DEME四氟硼酸盐（BF 4）等离子液体、聚环氧乙烷（PEO）：CsClO 4等高分子电解质。所有器件都显示出金属-绝缘体转变，阈值载流子密度为1 × 10（13）cm（-2）。所有器件的最大载流子密度也限制在1.6 x 10（14）cm（-2）以下。另一方面，低温下的电子迁移率随电解质的阳离子和门控温度而变化。在室温下门控的具有离子液体EMIM-DCA的EDLT在2K下显示出最高的迁移率2，600 cm（2）V（-1）s（-1）。所观察到的电解质的SrTiO 3通道迁移率的依赖性是由于在表面散射率的变化由吸附的阳离子和空间均匀性的阳离子在电解质中。(C)2017日本应用物理学会
We report the electrolyte dependence of the transport properties of SrTiO3 electric double layer transistors (EDLTs). Ionic liquids such as 1-ethyl-3-methylimidazolium (EMIM) bis(trifluoromethylsulfonyl) imide (TFSI), EMIM dicyanamide (DCA), N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium ( DEME) TFSI, and DEME tetrafluoroborate (BF4), and polymer electrolytes such as poly( ethylene oxide) (PEO): CsClO4, were used as the electrolytes. All the devices showed metal-insulator transition with a threshold carrier density of 1 x 10(13) cm(-2). The maximum carrier density was also limited to below 1.6 x 10(14) cm(-2) for all the devices. On the other hand, the electron mobility at low temperature varied with the cation of the electrolyte and the gating temperature. The EDLT with the ionic liquid EMIM-DCA, which gated at room temperature, showed the highest mobility of 2,600 cm(2)V(-1) s(-1) at 2K. The observed electrolyte dependence of the SrTiO3 channel mobility is attributed to the change in the surface scattering rate by the adsorbed cations and spatial homogeneity of the cations in the electrolyte. (C) 2017 The Japan Society of Applied Physics