Hole-drift mobility in phenylenediamine derivatives possessing methyl substituents

Getautis, Vytautas; Paliulis, O.; Gaidelis, Valentas; Jankauskas, Vygintas; Sidaravičius, Jonas

doi:10.1016/s1010-6030(02)00013-8

Cited by 14 publications

(8 citation statements)

References 16 publications

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“…The selection of a hole-and electron-conducting core is dictated by the HOMO and LUMO energy levels as well as the charge-carrier mobility. [91][92][93][94][95][96][97][98] The phase transition temperatures included in Chart 1 were determined by differential scanning calorimetry at a heating rate of 20°C/ min.…”

Section: Resultsmentioning

confidence: 99%

Light-Emitting Organic Materials with Variable Charge Injection and Transport Properties

et al. 2005

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Novel light-emitting organic materials comprising conjugated oligomers chemically attached via a flexible spacer to an electron-or hole-conducting core were designed for tunable charge injection and transport properties. Representative glassy-isotropic and glassy-liquid-crystalline (i.e., noncrystalline solid) materials were synthesized and characterized; they were found to exhibit a glass transition temperature and a clearing point close to 140 and 250°C, respectively; an orientational order parameter of 0.75; a photoluminescence quantum yield up to 51%; and HOMO and LUMO energy levels intermediate between those of blue-emitting oligofluorenes and the ITO and Mg/Ag electrodes commonly used in organic light-emitting diodes, OLEDs. This class of materials will help to balance charge injection and transport and to spread out the charge recombination zone, thereby significantly improving the device efficiency and lifetime of unpolarized and polarized OLEDs.

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Section: Resultsmentioning

confidence: 99%

Light-Emitting Organic Materials with Variable Charge Injection and Transport Properties

et al. 2005

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“…The newly synthesized polymers exhibit high hole drift mobilities and excellent film-forming properties and can be chemically crosslinked in the layer by reaction of the hydroxyl groups with polyisocyanates [4,5].…”

Section: Introductionmentioning

confidence: 99%

Novel hydrazone based polymers as hole transporting materials

Getautis

Gražulevičius

Daškevičienė

et al. 2005

Polymer

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“…While it is difficult to draw direct comparisons owing to variations in experimental technique and ultimate molecular composition, some side-byside comparisons are possible (Table 1). Results by Getautis et al 35 are the easiest to compare against the mobility of 2b/PDA where they measured the mobility of a spin-coated sample of unsiliconized 2b/PDA using time-of-flight spectroscopy with near-identical techniques to our current work. At a field strength of 400 (V/cm 2 ) 1/2 , they reported a mobility of 2 × 10 −4 cm 2 /(V s); for 2b/PDA at equivalent field strength and temperature, the mobility is 1 × 10 −4 cm 2 /(V s).…”

Section: ■ Results and Discussionmentioning

confidence: 92%

Charge Carrier Mobility of Siliconized Liquid Triarylamine Organic Semiconductors by Time-of-Flight Spectroscopy.

2015

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Triarylamines are a well-established family of organic semiconductors. Recently, we have attached short silicone chains to these molecules to alter their mechanical properties. The resulting compounds are liquids at room temperature. We have undertaken to confirm the suitability of these molecules for use in thin film flexible devices. One fundamental property of semiconductors is the charge carrier mobility, which provides a quantitative estimate for how rapidly charge percolates through a material. The charge carrier mobility for a series of six recently developed liquid siliconized triarylamines was measured using time-of-flight spectroscopy (TOF). In order to evaluate the effect of glass transition temperature on mobility, TOF was performed for different electric fields at temperatures above and below the glass transition temperature. Mobilities were found to compare favorably to the charge carrier mobilities of conventional nonliquid triarylamines. It was further observed that the mobilities conform to the predictions of the disorder formalism for a disordered solid both above and below the glass transition temperature. This suggests that charge transport is dominated by thermally activated intermolecular hopping rather than by any convective or diffusive mass transport within the liquid phase.

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Hole-drift mobility in phenylenediamine derivatives possessing methyl substituents

Cited by 14 publications

References 16 publications

Light-Emitting Organic Materials with Variable Charge Injection and Transport Properties

Light-Emitting Organic Materials with Variable Charge Injection and Transport Properties

Novel hydrazone based polymers as hole transporting materials

Charge Carrier Mobility of Siliconized Liquid Triarylamine Organic Semiconductors by Time-of-Flight Spectroscopy.

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