Electrical Conductivity, Thermoelectric Power, and Optical Properties of Organo-Soluble Polyaniline Organic Semiconductor

Yakuphanoğlu, F.; Şenkal, Bahire Filiz; Saraç, Ayfer

doi:10.1007/s11664-008-0404-9

Cited by 84 publications

(39 citation statements)

References 20 publications

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“…The optical band gap of the poly(3-thiophene boronic acid) is lower than that of PPTh films (E g ¼ 2.2 eV) [13], plasma polymerized thiophene (E g ¼ 2.0 eV) [12] and AF and BFpoly(thiophene)s (E g ¼ 2 eV) [11]. It is evaluated that the decrease in the optical band gap of the poly(3-thiophene boronic acid) is a good thing for the applications of electronic devices based polymer, for example, light emitting diode (LED), because the optical band gap of the semiconductor polymer allows the fabrication of new LEDs in which the color of the emitted light is tuned by the band gap between the valence and conduction bands in the semiconductor polymer [16].…”

Section: Resultsmentioning

confidence: 99%

Electrical conductivity and optical properties of poly(3‐thiophene boronic acid) organic semiconductor

Yakuphanoğlu

Şenkal

2009

Polymer Engineering & Sci

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Electrical conductivity and optical properties of the poly(3-thiophene boronic acid) have been investigated. The room temperature electrical conductivity and activation energy of the poly(3-thiophene boronic acid) were 2.0 3 10 29 S/cm and 0.17 eV, respectively. In the semiconductor region of the polymer, the charge transport mechanism is taking place by the hopping process in the localized states. The direct optical band gap value of the poly(3-thiophene boronic acid) was found to be 1.92 eV via optical absorption method. The width of localized states for the polymer was determined to be 0.36 eV. The refractive index dispersion curve of the polymer obeys the single oscillator model. The refractive index dispersion parameter E o /S o for the poly(3-thiophene boronic acid) was determined to be 9.82 3 10 12 eV m 2 . The optical dielectric constants of the polymer were determined. The real part of the dielectric constant of the polymer is higher than that of imaginary part of the dielectric constant. The imaginary part shows a peak corresponding to the absorption edge. It is evaluated that the electrical and optical results of the poly(3-thiophene boronic acid) indicate that it is an organic semiconductor with electrical and optical parameters. POLYM. ENG. SCI., 49:722-726, 2009.

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Section: Resultsmentioning

confidence: 99%

Electrical conductivity and optical properties of poly(3‐thiophene boronic acid) organic semiconductor

Yakuphanoğlu

Şenkal

2009

Polymer Engineering & Sci

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“…The charge transfer mechanism is due to the polarons. The polarons are radical cations having spin g = 1/ 2 and electronic charge = ±e [42]. These polarons are partially delocalized on polymeric chain by rearrangement of double bonds.…”

Section: Xrd Analysismentioning

confidence: 99%

HCl/CSA doped POT-Mn3O4 nanocomposites based conformable thin film temperature sensor for prosthetic hand gloves

Kumar

Singla

Kumar

et al. 2014

J Mater Sci: Mater Electron

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Flexible and conformable Hydrochloric acid/ Camphor sulphonic acid doped thin film of poly-o-toluidine-Mn 3 O 4 nanocomposites has been fabricated on fire retardant glass cloth substrate. These films were found to have RT-NTC characteristics in the temperature range of 30-185°C. The thermistor cut off has been found in the temperature range of 140-185 ± 5°C depending upon the type of dopant. The material has been characterized using FT-IR, XRD, TEM for structure and morphology and TGA/DTA/DTG for thermal stability. Thermistor constant (b) obtained from RT characteristics are in the range of 6,210-8,080 K and 6,736-8,824 K for HCl doped and CSA doped thin films respectively. The activation energies (DE) are obtained in the range 0.535-0.697 eV for HCl doped and 0.580-0.760 eV for CSA doped thin films. Further the linearization of thin film based NTC thermistors was carried out by using low cost analog circuit. The same can be evaluated for point and surface temperature sensing in gloves for prosthetic hands.

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“…On the other hand, solution-processed and flexible polymers are promising for printable electronics and optoelectronics for large-area applications, [12][13][14][15][16][17] which may eventually revolutionize flexible electronic applications. Compared to traditional inorganic thermoelectric materials, organic materials can exhibit tunable electrical and thermal conductivities by convenient molecular design.…”

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confidence: 99%

Magneto-Seebeck effect in an ITO/PEDOT:PSS/Au thin-film device

et al. 2016

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This article reports giant magnetic field effects on the Seebeck coefficient by exerting a Lorentz force on charge diffusion based on vertical multi-layer ITO/PEDOT:PSS/Au thin-film devices. The Lorentz force, induced by an external magnetic field, changes the charge transport and consequently generates angular dependent magnetoresistance. The proposed mechanism of the magneto-Seebeck effect is proved by measuring the magnetoresistance at a parallel, 45o and perpendicular angle to the temperature gradient. The gradual change of the magnetoresistance from a parallel to perpendicular angle indicates that the Lorentz force is a key driving force to develop the magneto-Seebeck effect. Therefore, our experimental results demonstrate a magnetic approach to control the thermoelectric properties in organic materials.

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Electrical Conductivity, Thermoelectric Power, and Optical Properties of Organo-Soluble Polyaniline Organic Semiconductor

Cited by 84 publications

References 20 publications

Electrical conductivity and optical properties of poly(3‐thiophene boronic acid) organic semiconductor

Electrical conductivity and optical properties of poly(3‐thiophene boronic acid) organic semiconductor

HCl/CSA doped POT-Mn3O4 nanocomposites based conformable thin film temperature sensor for prosthetic hand gloves

Magneto-Seebeck effect in an ITO/PEDOT:PSS/Au thin-film device

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