Single Crystal Microwires of p‐DTS(FBTTh2)2 and Their Use in the Fabrication of Field‐Effect Transistors and Photodetectors

Cui, Qiuhong; Hu, Yuanyuan; Zhou, Cheng; Feng, Tao; Huang, Jianfei; Zhugayevych, Andriy; Tretiak, Sergei; Nguyen, Thuc‐Quyen; Bazan, Guillermo C.

doi:10.1002/adfm.201702073

Cited by 26 publications

(24 citation statements)

References 41 publications

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“…Most visible‐light OPTs operate on relatively high voltages to deliver high R and D *, whereas F 16 CuPc nanoflake‐based OPT with vdW contact shows superior performance to most visible‐light OPTs even at a very low operating voltage ( V ds = 1 V), which offers new opportunities for emerging photodectectors. [ 41,57–67 ]…”

Section: Resultsmentioning

confidence: 99%

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Hao

Qin

et al. 2021

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2D organic crystals exhibit efficient charge transport and field‐effect characteristics, making them promising candidates for high‐performance nanoelectronics. However, the strong Fermi level pinning (FLP) effect and large Schottky barrier between organic semiconductors and metals largely limit device performance. Herein, by carrying out temperature‐dependent transport and Kelvin probe force microscopy measurements, it is demonstrated that the introducing of 2D metallic 1T‐TaSe2 with matched band‐alignment as electrodes for F16CuPc nanoflake filed‐effect transistors leads to enhanced field‐effect characteristics, especially lowered Schottky barrier height and contact resistance at the contact and highly efficient charge transport within the channel, which are attributed to the significantly suppressed FLP effect and appropriate band alignment at the nonbonding van der Waals (vdW) hetero‐interface. Moreover, by taking advantage of the improved contact behavior with 1T‐TaSe2 contact, the optoelectronic performance of F16CuPc nanoflake‐based phototransistor is drastically improved, with a maximum photoresponsivity of 387 A W−1 and detectivity of 3.7 × 1014 Jones at quite a low Vds of 1 V, which is more competitive than those of the reported organic photodetectors and phototransistors. The work provides an avenue to improve the electrical and optoelectronic properties of 2D organic devices by introducing 2D metals with appropriate work function for vdW contacts.

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Section: Resultsmentioning

confidence: 99%

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Hao

Qin

et al. 2021

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“…Cui et al. manufactured the single crystal microwires of p ‐DTS(FBTTh 2 ) 2 via a solution‐phase self‐assembly method (Figure d) . The OPTs based on this quasi one‐dimensional (1D) single crystals exhibited hole mobility of about 1.8 cm 2 V −1 s −1 , R as high as 5000 A W −1 and P of 10 4 –10 5 , respectively (Figure e).…”

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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“…The PDs they fabricated, based on [4‐R‐(N^C^N)PtCN(C 6 H 3 ‐2,6‐Me 2 )]PF 6 (CL11PF 6 ), yielded R of 4.57 mA W −1 and D* of 6.12 × 10 10 Jones. Cui et al prepared (7,7′‐(4,4‐bis(2‐ethylhexyl)‐4H‐silolo[3,2‐b:4,5‐b′]dithiophene‐2,6‐diyl)bis(6‐fluoro‐4‐(5′‐hexyl‐[2,2′‐bithiophen]‐5‐yl)benzo[c]‐[1,2,5]thiadiazole ( p ‐DTS(FBTTh 2 ) 2 ) single‐crystal microwires and investigated their photoresponse . The microwires showed a hole mobility of 1.8 cm 2 V −1 s −1 , which is much higher than that of the films, and the phototransistors reached a high R of 5000 A W −1 with on/off ratio of over 1000.…”

Section: Performance Improvement Strategiesmentioning

confidence: 99%

Strategies toward High‐Performance Solution‐Processed Lateral Photodetectors

Lin

Wang

2019

Advanced Materials

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Since the device performance mainly depends on the active materials and device architectures, they are the subject of extensive work, and there have been many achievements. Dispersible inorganic materials vastly simplify the preparation of films while maintaining good electrical conductivity; [1][2][3][4][5] organic small-molecule materials and polymer materials have wide wavelength response, especially in visible region, and can be adjusted easily by changing the functional groups; [6][7][8][9][10] organic-inorganic hybrid material systems are also a promising development direction, combining good electrical and optical properties; [11][12][13][14][15] in addition, the perovskite series of organic-inorganic hybrid materials has become a new research direction due to their excellent optoelectronic properties. [16][17][18][19][20] In addition, varieties of microstructures including nanoparticles, nanowires, nanosheets etc., have been widely investigated, and they have a wide range of applications in devices benefiting from their peculiar characteristics, like quantum size effect and anisotropy. [21][22][23][24][25] Besides working on active materials, constructing diverse device architectures is also a convenient and effective approach. [26][27][28][29][30] The fabrication of blend, bilayer, and multilayer architectures would be conducive to increasing responsivity, extending detection range, and accelerating response speed.Here, from active materials to device architectures, we systematically introduce and discuss the strategies for improving the device performance of solution-processed lateral PDs. To begin with, we briefly expound the working mechanism of the lateral PDs and clarify the key device figures-of-merit. Then, based on the active materials, we divide the devices into four categories: inorganic, organic, hybrid, and perovskite, and their corresponding improvement methods are summarized respectively. To close, we conduct a physical generalization and propose detailed suggestions for the further development of the field. Device Working PrincipleThe structures of lateral PDs are quite simple: an active layer between two parallel electrodes or using three electrodes (source, drain, and gate) for better control; and the detection of light mainly originates from the change of conductivity, which is caused by the increase of the carrier concentration under illumination.Due to their low cost and ease of integration, solution-processed lateral photodetectors (PDs) are becoming an important device type among the PD family. In recent years, enormous effort has been devoted to improving their performances, and great achievements have been made. A summary of the core progress, especially from the perspective of design principles and device physics, is necessary to further the development of the field, but is currently lacking. Here, to address this need, first, the working mechanism of PDs and the device figures-of-merit are introduced. Second, by classifying the active materials into four categories, including in...

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Single Crystal Microwires of p‐DTS(FBTTh₂)₂ and Their Use in the Fabrication of Field‐Effect Transistors and Photodetectors

Cited by 26 publications

References 41 publications

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

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

Strategies toward High‐Performance Solution‐Processed Lateral Photodetectors

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Single Crystal Microwires of p‐DTS(FBTTh2)2 and Their Use in the Fabrication of Field‐Effect Transistors and Photodetectors

Cited by 26 publications

References 41 publications

Lowering the Contact Barriers of 2D Organic F16CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Lowering the Contact Barriers of 2D Organic F16CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

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

Strategies toward High‐Performance Solution‐Processed Lateral Photodetectors

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Product

Resources

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Single Crystal Microwires of p‐DTS(FBTTh₂)₂ and Their Use in the Fabrication of Field‐Effect Transistors and Photodetectors

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts