Redistributed Current Density in Lateral Organic Light‐Emitting Transistors Enabling Uniform Area Emission with Good Stability and Arbitrary Tunability

Gao, Haikuo; Miao, Zhagen; Qin, Zhengsheng; Yang, Jiaxin; Wang, Tianyu; Gao, Can; Dong, Huanli; Hu, Wenping

doi:10.1002/adma.202108795

Cited by 34 publications

(30 citation statements)

References 63 publications

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“…Keeping in view the aforementioned issues, Gao et al proposed a drain-electrode-shaped area-emission lateral OLET (Figure 13g), combining the benefits of both vertical and lateral OLET devices. [290] The authors incorporated a charge-transport buffer layer between the drain electrode and the active channel in order to redistribute the current density in the traditional lateral devices for area emission. Theoretical and experimental investigations confirmed the redistributed potential with highly uniform current density under the drain electrode, enabling the recombination of balanced electrons and holes.…”

Section: Introductionmentioning

confidence: 99%

Impact of Planar and Vertical Organic Field‐Effect Transistors on Flexible Electronics

et al. 2023

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According to the forecast of Allied Market Research, the flexible electronics market is projected to reach $42.48 billion by 2027. It is estimated to revolutionize the lighting technology, power integration displays, and health monitoring systems. The popularity of flexible electronics is mainly due to the unique benefits of organic materials and devices that offer cost-effectiveness, low-temperature processability, mechanical softness, and shape adaptability, [5][6][7] which are difficult to obtain with traditional, complementary-metal-oxide-semiconductor (CMOS)-based rigid systems. [8] Over the past two decades, research interest in flexible electronic systems has grown exponentially, driven by the requirements of interface softness and shape adaptability for electronics used in Internet-of-Things (IoT), [9] human-machine interfaces, [10] and advanced healthcare. [11] Although significant progress has been made in academia, the practical application of flexible electronics in the industry is limited. Presently, thin-film photovoltaics and flexible displays mainly contribute to the flexible electronics market, with a noticeable presence held by radio frequency identification (RFID) tags and medical X-ray imagers. [12] Indeed, much of the success of present flexible electronic systems rely on the performance and reliability of thin-film The development of flexible and conformable devices, whose performance can be maintained while being continuously deformed, provides a significant step toward the realization of next-generation wearable and e-textile applications. Organic field-effect transistors (OFETs) are particularly interesting for flexible and lightweight products, because of their low-temperature solution processability, and the mechanical flexibility of organic materials that endows OFETs the natural compatibility with plastic and biodegradable substrates. Here, an in-depth review of two competing flexible OFET technologies, planar and vertical OFETs (POFETs and VOFETs, respectively) is provided. The electrical, mechanical, and physical properties of POFETs and VOFETs are critically discussed, with a focus on four pivotal applications (integrated logic circuits, light-emitting devices, memories, and sensors). It is pointed out that the flexible function of the relatively newer VOFET technology, along with its perspective on advancing the applicability of flexible POFETs, has not been reviewed so far, and the direct comparison regarding the performance of POFET-and VOFET-based flexible applications is most likely absent. With discussions spanning printed and wearable electronics, materials science, biotechnology, and environmental monitoring, this contribution is a clear stimulus to researchers working in these fields to engage toward the plentiful possibilities that POFETs and VOFETs offer to flexible electronics.

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Section: Introductionmentioning

confidence: 99%

Impact of Planar and Vertical Organic Field‐Effect Transistors on Flexible Electronics

et al. 2023

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“…This application may reach a wide range of fields involving integrated circuits and high‐speed signal processing. [ 155–157 ] Zhan et al. used PDI‐C13 as a charge transport and luminescence layer, and utilized thermal annealing and short channel length to increase current density in order to balance out the luminescence quenching.…”

Section: Application Of High Electron Mobility‐based Small‐molecule S...mentioning

confidence: 99%

Recent Research Progress of Organic Small‐Molecule Semiconductors with High Electron Mobilities

et al. 2023

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Organic electronics has made great progress in the past decades, which is inseparable from the innovative development of organic electronic devices and the diversity of organic semiconductor materials. It is worth mentioning that both of these great advances are inextricably linked to the development of organic high‐performance semiconductor materials, especially the representative n‐type organic small‐molecule semiconductor materials with high electron mobilities. The n‐type organic small molecules have the advantages of simple synthesis process, strong intermolecular stacking, tunable molecular structure, and easy to functionalize structures. Furthermore, the n‐type semiconductor is a remarkable and important component for constructing complementary logic circuits and p‐n heterojunction structures. Therefore, n‐type organic semiconductors play an extremely important role in the field of organic electronic materials and are the basis for the industrialization of organic electronic functional devices. This review focuses on the modification strategies of organic small molecules with high electron mobility at molecular level, and discusses in detail the applications of n‐type small‐molecule semiconductor materials with high mobility in organic field‐effect transistors, organic light‐emitting transistors, organic photodetectors, and gas sensors.

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“…Although this work is done on silicon, it still brings new insight to flexible displays. In addition to active-matix OLEDs (AMOLEDs), organic light-emitting transistors (OLETs) with current switch and light-emitting functions are also a highly integrated technology; − the situation and challenges of OLETs have been summarized in detail in the previous work by Qin and are not reproduced here …”

Section: Flexible Electronic Devicesmentioning

confidence: 99%

Near-Amorphous Conjugated Polymers: An Emerging Class of Semiconductors for Flexible Electronics

Wang

Yang

Zhang

et al. 2022

ACS Materials Lett.

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The emergence of flexible electronics with broad application prospects has put forward new requirements for organic semiconductors, i.e., not only the electrical properties but also the mechanical properties. Among the strategies to achieve synergy between mechanical and electrical properties, near-amorphous polymers are competitive candidates due to their advantages of intrinsic flexibility, high mobility, and high reproducibility. Near-amorphous polymers with excellent performance are continuing to attract attention, and recently, some significant progress has been achieved in this field. In this perspective, we summarize these excellent advances on near-amorphous polymers from the point of view of their molecular design principles, their resulting charge transport and mechanical properties, and their potential applications in flexible electronic devices. Finally, we give a brief discussion on the challenges and opportunities of nearamorphous materials in flexible electronics from the perspectives of semiconductor layer materials themselves, devices, and multifunctional integration.

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Redistributed Current Density in Lateral Organic Light‐Emitting Transistors Enabling Uniform Area Emission with Good Stability and Arbitrary Tunability

Cited by 34 publications

References 63 publications

Impact of Planar and Vertical Organic Field‐Effect Transistors on Flexible Electronics

Impact of Planar and Vertical Organic Field‐Effect Transistors on Flexible Electronics

Recent Research Progress of Organic Small‐Molecule Semiconductors with High Electron Mobilities

Near-Amorphous Conjugated Polymers: An Emerging Class of Semiconductors for Flexible Electronics

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