Mobility studies of field-effect transistor structures basedon anthracene single crystals

Алешин, А. Н.; Lee, J. Y.; Chu, Shi Wei; Kim, J. S.; Park, Y. W.

doi:10.1063/1.1767282

Cited by 154 publications

(108 citation statements)

References 18 publications

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“…Such technique uses the ability of thin, usually 1 mm or thinner, and flat organic crystals to adhere to other even surfaces, metallic or insulators, by electrostatic forces and to other organic material layers, such as SAMs 25 or polymers (for example, polymethylmethacrylate 26 ). Examples arrive from different classes of molecular materials, such as the acenes [25][26][27][28] , metal phtalocyanines 29 , thiophenes 30 or the fulvalenes 31 . As long as the substrate roughness is smaller than just a few nanometres, thin organic crystals are flexible enough to adjust to most substrate surfaces.…”

Section: Resultsmentioning

confidence: 99%

Photoconductive response in organic charge transfer interfaces with high quantum efficiency

2013

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Organic semiconductors have unique optical, mechanical and electronic properties that can be combined with customized chemical functionality. In the crystalline form, determinant features for electronic applications, such as molecular purity, the charge mobility or the exciton diffusion length, reveal a superior improved performance when compared with materials in a more disordered form. However, the use of organic single crystals in devices is still limited to a few applications, such as field-effect transistors. Here we report the first example of photoconductive behaviour of single-crystal charge-transfer interfaces. The system composed of rubrene and 7,7,8,8-tetracyanoquinodimethane presents a responsivity reaching 1 A W À 1 , corresponding to an external quantum efficiency of nearly 100%. This result opens the possibility of using organic single-crystal interfaces in photonic applications.

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Section: Resultsmentioning

confidence: 99%

Photoconductive response in organic charge transfer interfaces with high quantum efficiency

2013

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“…This I-V behavior is similar to previous results for anthracene single crystals where SCLC transport is thought to be the predominant transport mechanism. [23,24] As a more negative V GS is applied, more holes are induced in the semiconductor and the conductance of the channel region increases. A strong field-effect modulation of the channel conductance and current levels as high as 25 lA have been observed, as shown in Figure 4A.…”

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confidence: 99%

Single‐Crystal Polythiophene Microwires Grown by Self‐Assembly

et al. 2006

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Obtaining control over the supramolecular organization of electronically active p-conjugated polymers [1] would make it possible to fine-tune and optimize their electrical properties for applications in organic field-effect transistors (OFETs) [2][3][4][5] and sensors. [6,7] Typically, it is far more challenging to obtain high-quality single crystals of conjugated polymers by facile solution processing than oligomers [8] and small molecules, [9] which are prepared by vacuum processes. However, 1D, highquality, single-crystal semiconductors comparable to inorganic single crystals, such as silicon nanowires, have not hitherto been observed for conjugated polymers. Self-organized poly(3-hexylthiophene) (P3HT), [10][11][12][13][14][15][16][17][18] with its supramolecular 2D structure, is of special interest because the 1D electronic properties of the p-conjugated polymer chains are modified by the increased interchain stacking that results from p-p interactions. Therefore, the possibility of achieving good electrical performance as a result of 2D transport (i.e., band-like transport) in self-organized single-crystal P3HT has spurred its use in enhanced polymer electronic devices (PEDs). By better control of structural anisotropy, and by developing P3HT structures with strongly p-p interacting building blocks coinciding with the direction of current flow in PEDs, optimized electrical performance and, possibly, a truly delocalized transport regime may be attained. We report here the preparation and properties of high-quality, 1D single-crystal P3HT microwires grown by a facile self-assembly process in dilute solution. Figure 1 outlines the fabrication steps for the preparation of low-voltage, gate-modulated PEDs based on well-faceted, 1D single-crystal P3HT microwires. Dense octadecyltrichlorosilane (ODTS) self-assembled monolayers (SAMs) (structure shown in Fig. 1A) possessing sufficient robustness are used as the molecular dielectrics to reduce the operating voltage of COMMUNICATIONS

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“…However, even in the best organic TFTs, charge transport is still dominated by the presence of structural defects and chemical impurities. As a result, it has been concluded that the TFTs "may not be appropriate vehicles for illuminating basic transport mechanisms in organic materials " ͑Nel-son et al, 1998͒. Recently developed single-crystal organic transistors with significantly reduced disorder ͑Butko et al, 2003;de Boer et al, 2003;Podzorov, Sysoev, et al, 2003;Takeya et al, 2003;Aleshin et al, 2004;de Boer, Gershenson, et al, 2004;Sundar et al, 2004͒ provide unique opportunities to explore fundamental processes that determine operation and reliability of organic electronic devices. For the first time, these single-crystal OFETs have enabled the observation of intrinsic ͑not limited by static disorder͒ transport of field-induced charges on organic surfaces ͑Menard et Podzorov, Menard, Borissov, et al, 2004;.…”

Section: Introduction: Field Effect In Small-molecule Organic Semimentioning

confidence: 99%

Colloquium: Electronic transport in single-crystal organic transistors

2006

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Small-molecule organic semiconductors, together with polymers, form the basis for the emerging field of organic electronics. Despite the rapid technological progress in this area, our understanding of fundamental electronic properties of these materials remains limited. Recently developed organic field-effect transistors ͑OFETs͒ based on single crystals of small-molecule organic materials are characterized by an unprecedented quality and reproducibility. These devices provide a unique tool to study the fundamentals of polaronic transport on organic surfaces and to explore the limits of OFET performance. This Colloquium focuses on the intrinsic, not limited by static disorder, charge transport in single-crystal OFETs and on the nature of defects on surfaces of organic crystals. In the conclusion, an outline of the outstanding problems that are now becoming within experimental reach owing to the development of single-crystal OFETs is presented.

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Mobility studies of field-effect transistor structures basedon anthracene single crystals

Cited by 154 publications

References 18 publications

Photoconductive response in organic charge transfer interfaces with high quantum efficiency

Photoconductive response in organic charge transfer interfaces with high quantum efficiency

Single‐Crystal Polythiophene Microwires Grown by Self‐Assembly

Colloquium: Electronic transport in single-crystal organic transistors

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