Tailoring the Height of Ultrathin PbS Nanosheets and Their Application as Field-Effect Transistors
Tailoring the Height of Ultrathin PbS Nanosheets and Their Application as Field-Effect Transistors
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DOI：
10.1002/smll.201402144
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发表时间：
2015-02-18
期刊：
影响因子：
13.3
通讯作者：
Klinke, Christian
中科院分区：
文献类型：
--
作者：
Bielewicz, Thomas;Dogan, Sedat;Klinke, Christian
二维、溶液可加工的半导体材料预期用于低成本电子应用，例如晶体管和太阳能电池。在这里，硫化铅纳米片的横向尺寸为几微米的合成和它是如何显示它们的高度可以通过配体浓度的变化进行调整。由于纳米片的高度在4至大于20 nm之间的可调节性，电荷载流子被限制，这对它们的电子性质具有决定性影响。这通过它们在场效应晶体管中用作导电沟道来证明。实验表明，在电流，开/关比，和亚阈值摆幅方面的性能是可调的在一个大的范围内。
Two-dimensional, solution-processable semiconductor materials are anticipated to be used in low-cost electronic applications, such as transistors and solar cells. Here, lead sulfide nanosheets with a lateral size of several micrometers are synthesized and it is shown how their height can be tuned by the variation of the ligand concentrations. As a consequence of the adjustability of the nanosheets' height between 4 to more than 20 nm charge carriers are in confinement, which has a decisive impact on their electronic properties. This is demonstrated by their use as conduction channel in a field-effect transistor. The experiments show that the performance in terms of current, On/Off ratio, and sub-threshold swing is tunable over a large range.