Flexible electrophoretic display driven by solution‐processed organic thin‐film transistors

Yoneya, Nobuhide; Ono, Hideki; Ishii, Yui; Himori, Kazuo; Hirai, Nobukazu; Abe, Hidetsugu; Yumoto, Akira; Kobayashi, Noriko; Nomoto, Kazumasa

doi:10.1889/jsid20.3.143

Cited by 10 publications

(8 citation statements)

References 11 publications

(17 reference statements)

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“…1(e)) is peri-xanthenoxanthene (PXX), derivatives of which were shown to exhibit hole mobilities of up to 0.9 cm 2 /(Vs) [8], [9] and explored by Sony for use in OFET-driven displays due to their unprecedented stability. [10] Promising electronic characteristics and stability, which has been previously demonstrated through prolonged exposure to UV light, electrical stress, and thermal stress, [11] motivates the choice of xylindein for this study. When deposited from solution, xylindein forms a highly disordered porous, amorphous solid which may be disadvantageous for electronic properties favourable for device applications, as well as their reproducibility.…”

Section: Methodsmentioning

confidence: 99%

Fungi-Derived Pigments for Sustainable Organic (Opto)Electronics

et al. 2018

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We present on the optical and electronic properties of a fungi-derived pigment xylindein for potential use in (opto)electronic applications. Optical absorption spectra in solutions of various concentrations and in film are compared and are consistent with aggregate formation in concentrated solutions and films. In order to improve film morphology obtained by solution deposition techniques, an amorphous polymer PMMA was introduced to xylindein to form xylindein:PMMA blends. Current-voltage characteristics and hole mobilities extracted from space-charge limited currents were found to be comparable between pristine xylindein and xylindein:PMMA films. Side by side comparison of the photoresponse of pristine xylindein and xylindein:PMMA films at 633 nm revealed an increase in the photosensitivity in xylindein:PMMA films due to the improved morphology favouring enhanced charge generation.

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Section: Methodsmentioning

confidence: 99%

Fungi-Derived Pigments for Sustainable Organic (Opto)Electronics

et al. 2018

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“…30 The structure of xylindein was first reported in the 1960s 31,32 but its absolute configuration was unknown for many years, leading to a systematic re-examination in 2000 to obtain the xylindein tautomeric structure. 33 The developments utilizing derivatives with the PXX core 23,25,27−29 and our promising preliminary results incorporating xylindein in electronic devices 34,35 motivated the present paper, in which we investigate in detail the optical and (opto)electronic properties of naturally derived xylindein and xylindein-based films. In particular, we report on electron mobilities of up to 0.4 cm 2 /(V s) in amorphous pristine xylindein and xylindein:PMMA films, combined with high photo- and thermal stability of xylindein, and establish the mechanism of (photo)conduction in these films.…”

Section: Introductionmentioning

confidence: 94%

Xylindein: Naturally Produced Fungal Compound for Sustainable (Opto)electronics

et al. 2019

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Organic semiconductors are of interest for (opto)electronic applications due to their low cost, solution processability, and tunable properties. Recently, natural product-derived organic pigments attracted attention due to their extraordinary environmental stability and unexpectedly good optoelectronic performance, in spite of only partially conjugated molecular structure. Fungi-derived pigments are a naturally sourced, sustainable class of materials that are largely unexplored as organic semiconductor materials. We present a study of the optical and electronic properties of a fungi-derived pigment xylindein, which is secreted by the wood-staining fungi Chlorociboria aeruginosa , and its blends with poly(methyl methacrylate) (PMMA) and crystalline nanocellulose (CNC). Optical absorption spectra of xylindein revealed the presence of two tautomers whose structures and properties were established using density functional theory. Pronounced pigment aggregation in polar solvents and in films, driven by intermolecular hydrogen bonding, was also observed. The pigment exhibited high photostability, electron mobility up to 0.4 cm 2 /(V s) in amorphous films, and thermally activated charge transport and photoresponse with activation energies of ∼0.3 and 0.2 eV, respectively. The dark and photocurrents in xylindein:PMMA blends were comparable to those in pristine xylindein film, whereas blends with CNC exhibited lower currents due to inhomogeneous distribution of xylindein in the CNC.

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“…Meanwhile, this capability has practical advantages when coupled with photolithographic processes as a patterning techniques enable high-resolution, smaller process variations [3] and high-throughput [4]. By virtue of their excellent solution processability together with promising large-area coverage, OTFTs are attractive candidates in diverse applications [5][6][7][8][9][10], such as flexible displays [10,11] and radio frequency identification (RFID) [12], among others. Research on organic circuits has addressed in the last decades the development of inverters [13,14], logic gates, shift registers [14,15] and amplifiers [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Monotype Organic Dual Threshold Voltage Using Different OTFT Geometries

Arnal

Martínez‐Domingo

Ogier³

et al. 2019

Crystals

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It is well known that organic thin film transistor (OTFT) parameters can be shifted depending on the geometry of the device. In this work, we present two different transistor geometries, interdigitated and Corbino, which provide differences in the key parameters of devices such as threshold voltage (VT), although they share the same materials and fabrication procedure. Furthermore, it is proven that Corbino geometries are good candidates for saturation-mode current driven devices, as they provide higher ION/IOFF ratios. By taking advantage of these differences, circuit design can be improved and the proposed geometries are, therefore, particularly suited for the implementation of logic gates. The results demonstrate a high gain and low hysteresis organic monotype inverter circuit with full swing voltage at the output.

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Flexible electrophoretic display driven by solution‐processed organic thin‐film transistors

Cited by 10 publications

References 11 publications

Fungi-Derived Pigments for Sustainable Organic (Opto)Electronics

Fungi-Derived Pigments for Sustainable Organic (Opto)Electronics

Xylindein: Naturally Produced Fungal Compound for Sustainable (Opto)electronics

Monotype Organic Dual Threshold Voltage Using Different OTFT Geometries

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