Coordination nanosheets (CONASHs) or conjugated metal organic frameworks (MOFs) with distinctive metal-organic bonding structures exhibit promise for electronics, sensing, and energy storage. Porous Nickel-Benzene hexathiol complex (Ni-BHT) with noteworthy conductivity was first reported a decade ago, and recent synthetic modifications produced non-porous Ni-BHT with enhanced conductivity (≈50 S cm⁻¹). Here the charge transport physics of such non-porous Ni-BHT films are studied with even higher conductivity (≈112 S cm⁻¹). In contrast to the thermally activated electrical conductivity, thermoelectric measurements suggest an intrinsic metallic nature of Ni-BHT. It is shown that it is possible to tune the Fermi level and carrier polarity in Ni-BHT by electrolyte gating; gating is initially governed by the formation of an interfacial, electric double layer and then evolves into an electrochemical (de)doping process. These findings not only contribute to a deeper understanding of charge transport in CONASHs, but also show that Fermi level tuning is an effective approach for enhancing the thermoelectric performance of CONASHs.

中文翻译：

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镍苯六硫醇配位纳米片中电解质门控的电荷传输和载流子极性调节

具有独特金属有机键合结构的配位纳米片 （CONASH） 或共轭金属有机框架 （MOF） 在电子学、传感和储能方面前景广阔。具有显着导电性的多孔镍-苯六硫醇络合物 （Ni-BHT） 在十年前首次被报道，最近的合成改性产生了具有增强导电性 （≈50 S ^cm-1） 的无孔 Ni-BHT。在这里，以更高的电导率 （≈112 S ^cm-1） 研究了这种无孔 Ni-BHT 薄膜的电荷传输物理学。与热激活电导率相反，热电测量表明 Ni-BHT 具有固有的金属性质。结果表明，可以通过电解质门控来调节 Ni-BHT 中的费米能级和载流子极性;选通最初由表面双电层的形成控制，然后演变为电化学（去）掺杂过程。这些发现不仅有助于更深入地理解 CONASH 中的电荷传输，而且还表明费米能级调谐是增强 CONASH 热电性能的有效方法。