Molecular chemistry approaches for tuning the properties of two-dimensional transition metal dichalcogenides,Chemical Society Reviews

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Molecular chemistry approaches for tuning the properties of two-dimensional transition metal dichalcogenides
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2018-07-25 00:00:00 , DOI: 10.1039/c8cs00169c
Simone Bertolazzi _{1,

2,

3,

4,

5} , Marco Gobbi _{1,

2,

3,

4,

5} , Yuda Zhao _{1,

2,

3,

4,

5} , Claudia Backes _{6,

7,

8,

9} , Paolo Samorì _{1,

2,

3,

4,

5}

Affiliation

Two-dimensional (2D) semiconductors, such as ultrathin layers of transition metal dichalcogenides (TMDs), offer a unique combination of electronic, optical and mechanical properties, and hold potential to enable a host of new device applications spanning from flexible/wearable (opto)electronics to energy-harvesting and sensing technologies. A critical requirement for developing practical and reliable electronic devices based on semiconducting TMDs consists in achieving a full control over their charge-carrier polarity and doping. Inconveniently, such a challenging task cannot be accomplished by means of well-established doping techniques (e.g. ion implantation and diffusion), which unavoidably damage the 2D crystals resulting in degraded device performances. Nowadays, a number of alternatives are being investigated, including various (supra)molecular chemistry approaches relying on the combination of 2D semiconductors with electroactive donor/acceptor molecules. As yet, a large variety of molecular systems have been utilized for functionalizing 2D TMDs via both covalent and non-covalent interactions. Such research endeavours enabled not only the tuning of the charge-carrier doping but also the engineering of the optical, electronic, magnetic, thermal and sensing properties of semiconducting TMDs for specific device applications. Here, we will review the most enlightening recent advancements in experimental (supra)molecular chemistry methods for tailoring the properties of atomically-thin TMDs – in the form of substrate-supported or solution-dispersed nanosheets – and we will discuss the opportunities and the challenges towards the realization of novel hybrid materials and devices based on 2D semiconductors and molecular systems.

中文翻译：

分子化学方法可调节二维过渡金属二卤化物的性质

二维（2D）半导体（例如过渡金属二硫化碳（TMD）的超薄层）提供了电子，光学和机械特性的独特组合，并具有潜力，可以实现从柔性/可穿戴（光电）到光子的一系列新设备应用电子技术到能量收集和传感技术。开发基于半导体TMD的实用，可靠的电子设备的关键要求在于实现对其电荷载流子极性和掺杂的完全控制。不便的是，这种挑战性的任务无法通过完善的掺杂技术（例如离子注入和扩散），这不可避免地会损坏2D晶体，从而导致器件性能下降。如今，正在研究许多替代方案，包括各种依赖于2D半导体与电活性供体/受体分子结合的（超）分子化学方法。迄今为止，已利用多种分子系统通过以下方式对2D TMD进行功能化共价和非共价相互作用。这样的研究努力不仅实现了载流子掺杂的调谐，而且还实现了针对特定器件应用的半导体TMD的光学，电子，磁，热和感测特性的工程设计。在这里，我们将回顾实验性（超）分子化学方法中最有启发性的最新进展，这些方法用于定制原子薄的TMD的特性-以基质支持或溶液分散的纳米片形式-并讨论机遇和挑战致力于实现基于2D半导体和分子系统的新型混合材料和器件。

更新日期：2018-07-25

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