有机单晶场效应晶体管

有机单晶场效应晶体管的研究对于探索电子的本质特性具有十分重要的意义。近几年来,不管是在制备技术还是在器件性能的研究方面,有机单晶场效应晶体管均取得了很大的进步,并由此引起了社会的广泛关注,成为场效应晶体管领域的一个重要研究方向。本文主要介绍了有机单晶的生长方法、有机场效应器件的各种制备技术、器件的迁移率及其影响因素,并对有机单晶场效应晶体管的发展前景和面临的一些问题作了简要的讨论。     

有机单晶场效应晶体管

有机单晶场效应晶体管的研究对于探索电子的本质特性具有十分重要的意义。近几年来,不管是在制备技术还是在器件性能的研究方面,有机单晶场效应晶体管均取得了很大的进步,并由此引起了社会的广泛关注,成为场效应晶体管领域的一个重要研究方向。本文主要介绍了有机单晶的生长方法、有机场效应器件的各种制备技术、器件的迁移率及其影响因素,并对有机单晶场效应晶体管的发展前景和面临的一些问题作了简要的讨论。     

掺杂在有机场效应晶体管中的应用进展

有机场效应晶体管(OFETs)作为一种新型的电子器件,以其柔性、可大规模简单制备等优势获得了广泛的关注。 但是,OFETs面临着器件性能不足、调控手段复杂等问题。人们尝试使用掺杂对这些问题加以解决。 本文结合本课题组的相关工作,对掺杂技术在OFETs上的应用进行归纳、总结和展望。     

High-performance organic field-effect transistors: molecular design, device fabrication, and physical properties

In the past decade, tremendous progress has been made in organic field-effect transistors (OFETs). Their real applications require further development of device performance. OFETs consist of organic semiconductors, dielectric layers, and electrodes. Organic semiconductors play a key role in determining the device characteristics. The properties of the organic semiconductors, such as molecular structure and packing, as well as molecular energy levels, can be properly controlled by molecular design. Therefore, we designed and synthesized a series of organic molecules. The synthesized organic semiconductors exhibit excellent field-effect properties due to strong intermolecular interactions and proper molecular energy levels. Meanwhile, the influence of the device fabrication process, organic semiconductor/dielectric layer interface, and organic layer/electrode contact on the device performance was investigated. A deep understanding of these factors is helpful to improve field-effect properties. Furthermore, single-crystal field-effect transistors are highlighted because the single-crystal-based FETs can provide an accurate conducting mechanism of organic semiconductors and higher device performance as compared with thin film FETs.     

有机薄膜晶体管半导体材料的研究进展

有机薄膜晶体管(organic thin-film transistors,OTFTs)具有工艺简单、成本低及柔性良好等优点,在有源显示、传感及逻辑电路等领域有着十分重要的应用前景.实用性有机薄膜晶体管应具备高迁移率、高开关比、低阈值电压及良好的稳定性等性能.有机半导体材料是有机薄膜晶体管的主要组成部分,对器件的性能有着重要影响.介绍了有机薄膜晶体管的基本结构和运行模式,按照p型、n型及双极性分类总结了有机薄膜晶体管半导体材料的研究进展情况,最后对有机半导体材料的前景进行了展望.     

聚合物场效应晶体管材料及其器件

导电聚合物因为可以大面积成膜、器件制作工艺简单,近年来在有机场效应晶体管的研究中受到越来越多的关注。有的聚合物场效应晶体管其性能已经可以和无定型硅晶体管相比拟。本文回顾了聚合物场效应晶体管的发展历程,概述了聚合物场效应晶体管的材料、器件制作、性能及工作机理。同时,对聚合物场效应晶体管的发展前景和目前存在的问题作了简单的总结。     

聚合物场效应晶体管材料及其器件

导电聚合物因为可以大面积成膜、器件制作工艺简单,近年来在有机场效应晶体管的研究中受到越来越多的关注.有的聚合物场效应晶体管其性能已经可以和无定型硅晶体管相比拟.本文回顾了聚合物场效应晶体管的发展历程,概述了聚合物场效应晶体管的材料、器件制作、性能及工作机理.同时,对聚合物场效应晶体管的发展前景和目前存在的问题作了简单的总结.     

The impact of regiochemistry of conjugated molecules on the performance of organic electronic devices

Organic photovoltaics and field-effect transistors have attracted considerable attention due to the easy fabrication,low cost,light weight,and flexibility.Unsymmetrical conjugated building blocks are widely utilized for the design of new organic π-functional materials in order to achieve high-performance electronic devices,which has become a hot research topic in recent years.In this review,we summarized some typical organic π-functional materials with regioregular conjugated backbones with unsymmetrical electron-deficiency moieties and focused on the influence of regiochemistry on the final device performance.     

Electron transporting semiconducting polymers in organic electronics

Significant progress has been achieved in the preparation of semiconducting polymers over the past two decades, and successful commercial devices based on them are slowly beginning to enter the market. However, most of the conjugated polymers are hole transporting, or p-type, semiconductors that have seen a dramatic rise in performance over the last decade. Much less attention has been devoted to electron transporting, or n-type, materials that have lagged behind their p-type counterparts. Organic electron transporting materials are essential for the fabrication of organic p-n junctions, organic photovoltaic cells (OPVs), n-channel organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs) and complementary logic circuits. In this critical review we focus upon recent developments in several classes of electron transporting semiconducting polymers used in OLEDs, OFETs and OPVs, and survey and analyze what is currently known concerning electron transporting semiconductor architecture, electronic structure, and device performance relationships (87 references).     

Organic single crystals or crystalline micro/nanostructures: Preparation and field-effect transistor applications

Organic single crystals hold great promise for the development of organic semiconductor materials, because they could reveal the intrinsic electronic properties of these materials, providing high-performance electronic devices and probing the structure-property relationships. This article reviews the preparation methods for organic single crystals or crystalline micro/nanostructures, including vapor phase growth methods and solution-processed methods, and summarizes a few methods employed in the fabrication of field-effect transistors along with dozens of examples concerning both small molecules and polymers with high field-effect performance.     

Tailoring and patterning of dielectric interfaces for the development of advanced organic field-effect transistors

The progress of organic field-effect transistors (OFETs) has led to the advent of a new area of printed and/or flexible electronics. In organic transistors and circuits, the interface between a gate insulator (GI) and an organic semiconductor (OS) plays a critical role on the electrical performance together with the functionality, the reliability and the long-term stability. In this review, we describe the basic principles of engineering a variety of the GI/OS interfaces for the development of advanced OFETs from the framework of the surface morphology and the physico-chemical surface interactions. We also discuss the dielectric interface modification and the resultant device performance of the OFETs.     

有机单晶电路的研究进展

与传统硅基集成电路相比, 有机集成电路具有成本低、 柔性及易携带等优势. 有机单晶集成电路在有机集成电路的基础上提高了材料的有序度和迁移率, 从而大大提升了电学性能, 具有丰富的研究价值和广泛的应用前景. 本文综合评述了有机单晶电路的研究进展, 重点总结了利用有机单晶制备逻辑门电路的相关工作, 并介绍了将有机单晶用于集成电路上的尝试, 最后分析了有机单晶集成电路研究中面临的挑战并对其未来的发展进行了展望.     

High-performance and multifunctional organic field-effect transistors

Organic field-effect transistors(OFETs) refer to field-effect transistors that use organic semiconductors as channel materials. Owing to the advantages of organic materials such as solution processability and intrinsic flexibility, OFETs are expected to be applicable in emergent technologies including wearable electronics and sensors, flexible displays, internet-of-things, neuromorphic computing, etc. Improving the electrical performance and developing multifunctionalities of OFETs are two major...     

Progresses in organic field-effect transistors and molecular electronics

In the past years, organic semiconductors have been extensively investigated as electronic materials for organic field-effect transistors (OFETs). In this review, we briefly summarize the current status of organic field-effect transistors including materials design, device physics, molecular electronics and the applications of carbon nanotubes in molecular electronics. Future prospects and investigations required to improve the OFET performance are also involved. __________ Translated from Huaxue Tongbao (Chemistry), 2006, 69(6) (in Chinese)     

Effect of morphology on organic thin film transistor sensors

This review provides a general introduction to organic field-effect transistors and their application as chemical sensors. Thin film transistor device performance is greatly affected by the molecular structure and morphology of the organic semiconductor layer. Various methods for organic semiconductor deposition are surveyed. Recent progress in the fabrication of organic thin film transistor sensors as well as the correlation between morphology and analyte response is discussed.     

The Emergence of Organic Single‐Crystal Electronics

Organic semiconducting single crystals are perfect for both fundamental and application‐oriented research due to the advantages of free grain boundaries, few defects, and minimal traps and impurities, as well as their low‐temperature processability, high flexibility, and low cost. Carrier mobilities of greater than 10 cm² V^?1 s^?1 in some organic single crystals indicate a promising application in electronic devices. The progress made, including the molecular structures and fabrication technologies of organic single crystals, is introduced and organic single‐crystal electronic devices, including field‐effect transistors, phototransistors, p‐n heterojunctions, and circuits, are summarized. Organic two‐dimensional single crystals, cocrystals, and large single crystals, together with some potential applications, are introduced. A state‐of‐the‐art overview of organic single‐crystal electronics, with their challenges and prospects, is also provided.     

Organic thin-film transistors as transducers for (bio) analytical applications

The use of organic thin-film transistors (OTFTs) in sensorics is relatively new. Although electronic noses, electronic textiles and disposable biochemical sensors appear to be viable applications for this type of devices, the benefits of the technology still have to be proven. This paper aims to provide a review of the recent advances in the area of chemically sensitive field-effect devices based on organic thin-film transistors (OTFTs), with emphasis on bioanalytical applications. Detection principle, device configuration, materials and fabrication processes as well as sensor performances will be discussed, with emphasis on the potential for implementation in real applications and the important challenges ahead.     

有机场效应晶体管应用于化学及生物传感的研究进展

有机场效应晶体管(OFETs)是以有机半导体材料作为有源层的晶体管器件。和传统的无机半导体器件相比,由于其具有成本低、易加工、柔性好和生物相容性而被人们广泛研究,在多种化学和生物传感器领域具有潜在而广泛的应用前景。本文简单介绍了OFETs的结构和工作原理,总结了近几年来OFETs在化学及生物传感方面的研究进展,最后对OFETs的发展方向做了归纳和展望。     

Alignment and patterning of organic single crystals for field-effect transistors

Organic field-effect transistors are of great importance to electronic devices. With the emergence of various preparation techniques for organic semiconductor materials, the device performance has been improved remarkably. Among all of the organic materials, single crystals are potentially promising for high performances due to high purity and well-ordered molecular arrangement. Based on organic single crystals, alignment and patterning techniques are essential for practical industrial application of electronic devices. In this review, recently developed methods for crystal alignment and patterning are described.     

Recent structural evolution of lactam- and imide-functionalized polymers applied in organic field-effect transistors and organic solar cells

Organic semiconductor materials, especially donor–acceptor (D–A) polymers, have been increasingly applied in organic optoelectronic devices, such as organic field-effect transistors (OFETs) and organic solar cells (OSCs). Plenty of high-performance OFETs and OSCs have been achieved based on varieties of structurally modified D–A polymers. As the basic building block of D–A polymers, acceptor moieties have drawn much attention. Among the numerous types, lactam- and imide-functionalized electron-deficient building blocks have been widely investigated. In this review, the structural evolution of lactam- or imide-containing acceptors (for instance, diketopyrrolopyrrole, isoindigo, naphthalene diimide, and perylene diimide) is covered and their representative polymers applied in OFETs and OSCs are also discussed, with a focus on the effect of varied structurally modified acceptor moieties on the physicochemical and photoelectrical properties of polymers. Additionally, this review discusses the current issues that need to be settled down and the further development of new types of acceptors. It is hoped that this review could help design new electron-deficient building blocks, find a more valid method to modify already reported acceptor units, and achieve high-performance semiconductor materials eventually.

This review highlights the recent structural evolution of lactam- and imide-functionalized polymers applied in organic field-effect transistors and organic solar cells.