Investigating the Thermal Stability of Organic Thin‐Film Transistors and Phototransistors Based on [1]‐Benzothieno‐[3,2‐<i>b</i>]‐[1]‐benzothiophene Dimeric Derivatives

He, Yu; Guo, Shenghui; He, Yaowu; Murtaza, Imran; Li, Aiyuan; Zeng, Xianzhe; Guo, Yitong; Zhao, Yang; Chen, Xiaolong; Meng, Hong

doi:10.1002/chem.201803542

Cited by 13 publications

(2 citation statements)

References 67 publications

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“…High-performance OPTs have P values around 10 4 − 10 6 . 26,28,58,61,62 Figure 3b shows the P values calculated for our devices as a function of V GS for different FF values. The bottom panel provides the maximum photosensitivity value (P max ) for each FF, showing no significant variation in P max (<10 5 ).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Pushing On-Chip Photosensitivity Forward Using Edge-Driven Vertical Organic Phototransistors

Andrade

Merces

Nawaz

et al. 2023

ACS Appl. Electron. Mater.

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Developing high-performance photosensors using prototype device architectures is essential to pushing forward developing and advancing next-generation optoelectronic applications. This work reports an organic phototransistor (OPT) with an ultra-short conducting channel (tens of nanometers) and outstanding photoelectric conversion efficiency. The OPT is based on a vertical organic field-effect transistor (VOFET) architecture, which utilizes a rolled-up metallic nanomembrane (NM) as the drain electrode and a photolithographically patterned (rectangular-shaped) perforated source electrode. These features expand the concept of conventional VOFETs as the former enables the incorporation of ultra-thin active layers and allows reliable control over gate-induced modulation of channel current. Using the engineering as abovementioned strategies, we focused on obtaining an improved device performance, studying their fundamental operating principle, and further investigating their application as photosensors. The optimized devices exhibited low operating voltages (<5 V) and enhanced on/off current ratio (∼105). The VOFET photoresponse was characterized by measuring the electrical characteristics in the dark and under illumination using three different monochromatic light colors. Under blue light, our devices demonstrated impressive photosensitivity (P max ≈ 105) and fast photoelectric conversion (steep light-induced threshold voltage shift), demonstrating that the rolled-up NM OPT shows excellent potential as a highly sensitive photodetector with low power consumption.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Pushing On-Chip Photosensitivity Forward Using Edge-Driven Vertical Organic Phototransistors

Andrade

Merces

Nawaz

et al. 2023

ACS Appl. Electron. Mater.

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“…Two new and stable BTBT dimeric derivatives: 1,4‐bis([1]benzothieno[3,2‐b][1]benzothiophene‐2‐yl)‐benzene (BTBT−Ph−BTBT) and 4,4′‐bis([1]benzothieno[3,2‐b][1]benzothiophene‐2‐yl)‐1,1′‐biphenyl (BTBT−DPh−BTBT) were designed and synthesized by He et al. . The mobilities of transistors based on vapor‐deposited thin films of BTBT−Ph−BTBT and BTBT−DPh−BTBT were up to 2.5 and 3.6 cm 2 V −1 s −1 , respectively.…”

Section: Recent Progress In Optsmentioning

confidence: 99%

Recent Progress in Organic Phototransistors: Semiconductor Materials, Device Structures and Optoelectronic Applications

Huang

Fuchs

et al. 2019

ChemPhotoChem

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Phototransistors combine light detection and signal amplification functions into a single device and are regarded as one of the most important components for optoelectronic integration. In recent years, organic phototransistors (OPTs) have attracted worldwide interest because of their potential advantages of low cost, light weight, excellent flexibility and broadband detection. In this review, a brief description of the working mechanisms and performance metrics of OPTs is presented. Afterwards, the recent progress of OPTs based on the conventional planar fieldeffect transistor structure is presented. Furthermore, from the perspective of novel device architectures and interface engineering, strategies for improving the performance of OPTs are discussed. Flexible optoelectronic devices based on OPTs for potential application in next-generation wearable and humanfriendly electronics are also highlighted. Finally, an outlook for future research directions and challenges for OPTs is provided.

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Large‐Area Processable Ultrathin Organic Transistors with High Mobility and Mechanical Stabilities

Mun,

Kim,

Seong

et al. 2024

Adv Elect Materials

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For applications involving the implantation of organic thin‐film transistors (OTFTs) in flexible environments, maintaining uniform device performance and ultrathin profiles with excellent mechanical stability is crucial for dynamic deformable conditions. This study presents high‐performance, mechanically flexible ultrathin OTFTs with a thickness under 5 µm, designed to be scalable for utilization in large areas. The OTFTs utilized an organosilicon polymer dielectric layer synthesized via initiated chemical vapor deposition combined with the crystalline organic semiconductor 2‐Decyl‐7‐phenyl[1]benzothieno[3,2‐b][1]benzothiophene (Ph‐BTBT‐10). Compared with conventional organic transistors, the OTFTs exhibited exceptional features, such as a charge carrier mobility of up to 7 cm2 V−1 s−1 and a near‐zero threshold voltage. Their performance is showcased across 900 devices on a 10 cm × 10 cm substrate to ensure uniformity and scalability. Additionally, the OTFTs demonstrate remarkable resilience to mechanical deformation, with a 97.4% mobility retention rate under a 20% tensile compression. After 1000 cycles of repeated deformation stress, they maintain a robust 94.6% performance level compared with the initial state. In summary, the ultrathin flexible OTFTs exhibit exceptional resilience to mechanical deformation, extended air exposure, uniformity in large arrays, and high mobility. This makes them promising for diverse applications, such as in vivo organ monitoring and skin displays.

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Investigating the Thermal Stability of Organic Thin‐Film Transistors and Phototransistors Based on [1]‐Benzothieno‐[3,2‐b]‐[1]‐benzothiophene Dimeric Derivatives

Cited by 13 publications

References 67 publications

Pushing On-Chip Photosensitivity Forward Using Edge-Driven Vertical Organic Phototransistors

Pushing On-Chip Photosensitivity Forward Using Edge-Driven Vertical Organic Phototransistors

Recent Progress in Organic Phototransistors: Semiconductor Materials, Device Structures and Optoelectronic Applications

Large‐Area Processable Ultrathin Organic Transistors with High Mobility and Mechanical Stabilities

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