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首页> 外文期刊>ACS applied materials & interfaces >Colloidal Quantum Dot Inks for Single-Step-Fabricated Field-Effect Transistors: The Importance of Postdeposition Ligand Removal
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Colloidal Quantum Dot Inks for Single-Step-Fabricated Field-Effect Transistors: The Importance of Postdeposition Ligand Removal

机译:用于单步制造的场效应晶体管的胶体量子点油墨:后沉积配体去除的重要性

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摘要

Colloidal quantum dots are a class of solution processed semiconductors with good prospects for photovoltaic and optoelectronic applications. Removal of the surfactant, so-called ligand exchange, is a crucial step in making the solid films conductive, but performing it in solid state introduces surface defects and cracks in the films. Hence, the formation of thick, device-grade films have only been possible through layer-by-layer processing, limiting the technological interest for quantum dot solids. Solution-phase ligand exchange before the deposition allows for the direct deposition of thick, homogeneous films suitable for device applications. In this work, fabrication of field-effect transistors in a single step is reported using blade-coating, an upscalable, industrially relevant technique. Most importantly, a postdeposition washing step results in device properties comparable to the best layer-by-layer processed devices, opening the way for large-scale fabrication and further interest from the research community.
机译:胶体量子点是一类加工半导体,具有良好的光伏和光电应用前景。除去表面活性剂,所谓的配体交换是使实体膜导电的关键步骤,但是在固态中进行其在薄膜中引入表面缺陷和裂缝。因此,仅通过层逐层处理形成厚,装置级膜的形成,限制了量子点固体的技术兴趣。溶液相配体交换在沉积前允许直接沉积厚的均匀薄膜,适用于器件应用。在这项工作中,使用刀片涂层,升高,工业相关技术,在单一步骤中制造场效应晶体管的制造。最重要的是,在与最佳的逐层加工装置相当的设备性质中,开启了用于从研究界的大规模制造和进一步兴趣的设备性能。

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