Organic Semiconductor Materials

Facchetti, Antonio; Marks, Tobin J.; Katz, Howard E.; Veinot, Jonathan

doi:10.1007/978-1-4419-9074-7_2

Cited by 11 publications

(7 citation statements)

References 180 publications

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“…48 Electron mobilities as high as 0.6 cm 2 V -1 s -1 have been observed in DFHCO-4T recently, and ambipolar transport (with n-and p-channel mobilities of ∼10 -3 ) has been observed in thin films of DHCO-4T. 49…”

Section: Literature Summary Of N-channel Organic Materials For Transi...mentioning

confidence: 96%

Introduction to Organic Thin Film Transistors and Design of n-Channel Organic Semiconductors

et al. 2004

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The development of new organic semiconductors with improved performance in organic thin film transistors (OTFTs) is a major challenge for materials chemists. There is a particular need to develop air-stable n-channel (electron-conducting) organic semiconductors with performance comparable to that of p-channel (hole-conducting) materials, for organic electronics to realize the benefits of complementary circuit design, i.e., the ability to switch transistors with either positive or negative gate voltages. There have been significant advancements in the past five years. In terms of standard OTFT metrics such as the field effect mobility (µ FET ) and on-to-off current ratio (I ON /I OFF ), n-channel OTFTs have achieved performance comparable both to that of n-channel amorphous silicon TFTs and to that of the best reported p-channel (hole-conducting) OTFTs; however, issues of device stability linger. This review provides a detailed introduction to OTFTs, summarizes recent progress in the development of new n-channel organic semiconductors, and discusses the critical properties that any prospective n-channel material must have. Methods important to semiconductor design such as electronic structure calculations and synthetic structural modifications are highlighted in a case study of the development of a new n-channel material based on a terthiophene modified with electron-withdrawing groups. The review concludes with a discussion of directions for future work in this area.

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Section: Literature Summary Of N-channel Organic Materials For Transi...mentioning

confidence: 96%

Introduction to Organic Thin Film Transistors and Design of n-Channel Organic Semiconductors

et al. 2004

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“…Currently, the best performing molecule as the active material in p -type organic transistors is pentacene, − with high mobilities over 1.0 cm 2 V -1 s -1 and decent on−off ratios. However, pentacene is subject to rapid degradation in ambient conditions, presumably to form the transannular endoperoxide or dimeric Diels−Alder adducts. , As such, much attention in the field has been focused on designing new organic semiconductor candidates. , The ideal candidate should be suitable for solution processing, stable in ambient conditions, and possess high-charge mobility. Among the few examples of pentacene derivatives are Anthony's triisopropylsilyl(TIPS)-ethynyl substituted pentacene and anthradithiophene derivatives.…”

mentioning

confidence: 99%

“…5,6 As such, much attention in the field has been focused on designing new organic semiconductor candidates. 7,8 The ideal candidate should be suitable for solution processing, stable in ambient conditions, and possess high-charge mobility. Among the few examples of pentacene derivatives are Anthony's triisopropylsilyl(TIPS)-ethynyl substituted pentacene 9 and anthradithiophene derivatives.…”

mentioning

confidence: 99%

High-Performance Organic Semiconductors: Asymmetric Linear Acenes Containing Sulphur

2006

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Two new linear acenes with fused thiophene units have been synthesized. These acenes have conjugation lengths between anthracene and pentacene. Thin films of these linear molecules were characterized by ultraviolet spectroscopy, X-ray diffraction, atomic force microscopy (AFM), and field-effect transistor measurements. Submonolayer AFM studies show growth that greatly resembles pentacene, while thin-film growth is dendritic. Mobilites as high as 0.47 cm2 V-1 s-1 have been found for the tetraceno[2,3-b]thiophene and are as high as 0.15 cm2 V-1 s-1 for anthra[2,3-b]thiophene.

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“…[5,6] The latter has inspired many groups to pursue the synthesis, purification, and characterization of many molecules as either p-type or n-type organic semiconductors. [5][6][7][8][9][10][11][12][13] Organic transistors may find use in large-area displays, sensors, or radio-frequency identification tags. [14] Since the report of the first organic thin-film transistor (TFT), efforts have been made to chemically functionalize the conjugated core, in the hope of elucidating structure-property relationships that have been well-established for inorganic materials.…”

Section: Introductionmentioning

confidence: 99%

“…[14] Since the report of the first organic thin-film transistor (TFT), efforts have been made to chemically functionalize the conjugated core, in the hope of elucidating structure-property relationships that have been well-established for inorganic materials. [7,[15][16][17] For example, Garnier and co-workers showed that adding a linear hexyl group at the a-position of sexithiophene (6T) resulted in a 25-fold increase in TFT mobility. [11] This was explained by the ordering that resulted from the natural association of the alkyl side chains and the conjugated core of each molecule with that of its neighbor in the thin film.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Asymmetric Linear Acenes for High‐Performance Organic Semiconductors

Tang

Reichardt

Okamoto

et al. 2008

Adv Funct Materials

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A series of compounds from the tetraceno[2,3‐b]thiophene and the anthra[2,3‐b]thiophene family of semiconducting molecules has been made. Specifically, synthetic routes to functionalize the parent molecules with bromo and then hexyl groups are shown. The bromo‐ and hexyl‐functionalized tetraceno[2,3‐b]thiophene and anthra[2,3‐b]thiophene were characterized in the top‐contact thin‐film transistor (TFT) geometry. They give high mobilities, ranging from 0.12 cm2 V−1 s−1 for α‐n‐hexylanthra[2,3‐ b]thiophene to as high as 0.85 cm2 V−1 s−1 for α‐bromotetraceno[2,3‐b]thiophene. Notably, grain size increases, going from the shorter anthra[2,3‐b]thiophene core to the longer tetraceno[2,3‐b]thiophene core, with a corresponding increase in mobility. The transition from undesirable 3D to desirable 2D thin‐film growth is explained by the increase in length of the molecule, in this case by one benzene ring, which results in an increase in intralayer interactions relative to interlayer interactions.

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Organic Semiconductor Materials

Cited by 11 publications

References 180 publications

Introduction to Organic Thin Film Transistors and Design of n-Channel Organic Semiconductors

Introduction to Organic Thin Film Transistors and Design of n-Channel Organic Semiconductors

High-Performance Organic Semiconductors: Asymmetric Linear Acenes Containing Sulphur

Functionalized Asymmetric Linear Acenes for High‐Performance Organic Semiconductors

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