Ambipolar organic transistors and near-infrared phototransistors based on a solution-processable squarilium dye

Wöbkenberg, Paul H.; Labram, John G.; Swiecicki, Jean-Marie; Parkhomenko, Ksenia; Sredojević, Dušan N.; Gisselbrecht, Jean Paul; Leeuw, Dago M. de; Bradley, Donal D. C.; Djukic, Jean Pierre; Anthopoulos, Thomas D.

doi:10.1039/b919970e

Cited by 77 publications

(53 citation statements)

References 39 publications

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“…The quantum efficiency of these very first, proof-of-concept, CP detecting OFETs was 0.1%, similar to that previously reported for (non-CP responsive) organic photo-transistors 13 with a similar mobility. The efficiency could be increased in the future by increasing the charge carrier mobility, hence charge extraction efficiency, via chemical synthesis [6][7][8]15 .…”

supporting

confidence: 69%

“…The efficiency could be increased in the future by increasing the charge carrier mobility, hence charge extraction efficiency, via chemical synthesis [6][7][8]15 . Additionally, variation of the helicene chemical structure should allow the absorption band to be tuned to longer wavelengths, as demonstrated for benzothiophene-helicenes (absorption edge about 600 nm) 27 and squarilium small molecules (absorption edge about 1.2 μm) 13 , for CP detection across the visible into the infra-red. Furthermore, helicenes which form larger crystalline domains (better coverage, less trapping) and are ambient stable are additional future targets for this area.…”

mentioning

confidence: 99%

“…Organic semiconductors (OSCs) can be used in a range of different optoelectronic devices, including organic light-emitting transistors (OLETs) 10 , photo-diodes (OPDs) 11 and photo-transistors [12][13][14] . One key advantage of such materials is the ability to tune factors such as the optical energy gap and the energy of the electron and hole transport levels, using chemical synthesis [6][7][8]15 .…”

mentioning

confidence: 99%

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Circularly polarized light detection by a chiral organic semiconductor transistor

et al. 2013

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confidence: 69%

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confidence: 99%

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confidence: 99%

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Circularly polarized light detection by a chiral organic semiconductor transistor

et al. 2013

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“…[1][2][3][4] OFETs have the potential to be used in low-cost, large area electronics, ideally compatible with fl exible substrates. [5][6][7] Examples of targeted applications of OFETs include electrical circuitry, [ 7 ] opticaldisplays, [ 6 , 8 ] optical-sensors, [ 9,10 ] RFID tags, [ 11,12 ] and biological applications. [ 13,14 ] In addition to their technological applications, OFETs have also proven to be excellent test-beds for studying the characteristics of semiconducting material systems and evaluating semiconductor performance.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Monitoring of the Solid-State Microstructure Evolution of Polymer:Fullerene Blend Films Using Field-Effect Transistors

et al. 2010

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Organic fi eld-effect transistors (OFETs) are used to investigate the evolution of the solid-state microstructure of blends of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C 61 -butyric acid methyl ester (PC 61 BM) upon annealing. Changes in the measured fi eld-effect mobility of holes and electrons are shown to reveal relevant information about the phase-segregation in this system, which are in agreement with a eutectic phase behavior. Using dualgate OFETs and in-situ measurements, it is demonstrated that the spatialand time-dependence of microstructural changes in such polymer:fullerene blend fi lms can also be probed. A percolation-theory-based simulation is carried out to illustrate how phase-segregation in this system is expected to lead to a substantial decrease in the electron conductivity in an OFET channel, in qualitative agreement with experimental results.

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“…The device photoresponse results directly related to the handedness of the semiconducting molecule, leaving unaffected the OFET quantum efficiency (around 0.1%) with respect to the non-polarized organic phototransistors. [121] Enhanced efficiency and larger absorption band could be achieved in such devices with better carrier mobility and modified molecular chemical structure. [122] As described so far, helical metamaterials represent a very promising tool for a disrupting improvement in nanophotonics.…”

Section: Wwwadvopticalmatdementioning

confidence: 99%

Materials and 3D Designs of Helix Nanostructures for Chirality at Optical Frequencies

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et al. 2017

Advanced Optical Materials

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The capability to fully control the chiro‐optical properties of metamaterials has drawn considerable attention due to developments in metamaterial fabrication techniques and a deeper understanding of the light–matter interaction, enabling a number of applications from integrated photonics to life sciences. From simple geometrical studies on single helix shaped metamaterials, both the design complexity and nanofabrication capability are steadily increasing allowing to extend their properties to the visible regime and beyond. In this work, helix‐shaped micro‐ and nanostructures are reviewed, which have the possibility to modulate their optical response in the linear regime at optical frequencies by spatial arrangement or by constitutive material. An overview of different theories describing the general optical operation of chiral media and a discussion on experimental results obtained by the state‐of‐the‐art helix structures realized by different fabrication techniques is provided. Finally, advanced designs for improved functionality envisaged to match practical applications or to enable new optical multifunctionalities are compared. Even if many applications have been envisaged only theoretically, the continuous effort and progress shown by the research community engaged in this field suggests that helical chiral metamaterials could represent a disruptive breakthrough for advanced optical devices.

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Ambipolar organic transistors and near-infrared phototransistors based on a solution-processable squarilium dye

Cited by 77 publications

References 39 publications

Circularly polarized light detection by a chiral organic semiconductor transistor

Circularly polarized light detection by a chiral organic semiconductor transistor

In-Situ Monitoring of the Solid-State Microstructure Evolution of Polymer:Fullerene Blend Films Using Field-Effect Transistors

Materials and 3D Designs of Helix Nanostructures for Chirality at Optical Frequencies

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