Newly synthesised gadolinium bis-phthalocyanine sandwich complex: Ambipolar organic semiconductor

Seema Barad; Theo Kreouzis; Andrew N. Cammidge; Michael J. Cook; Asim K. Ray

doi:10.1088/1361-6641/aad42d

Newly synthesised gadolinium bis-phthalocyanine sandwich complex: Ambipolar organic semiconductor

Seema Barad, Theo Kreouzis, Andrew N. Cammidge, Michael J. Cook, Asim K. Ray

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Abstract

Time of flight (TOF) photocurrent transient studies on 5µm thick solution processed films of novel non-peripherally octa-octyl-substituted liquid crystalline gadolinium bis-1,4,8,11,15,18,22,25-octakis(octyl) phthalocyanines (8GdPc2) provide a quantitative analysis of the intrinsic ambipolar charge transport relative to mesomorphic structure of this lanthanide compound. Characteristic liquid crystalline phases of these molecules have been identified from differential scanning calorimetry supported by observation from the UV-visible absorption, showing crystal-columnar mesophase and columnar mesophase-isotropic liquid transitions at 64.2°C and 162°C, respectively. The TOF carrier mobility is found to be structure dependent and highest values of 4.73×10−6m2/Vs and 1.6×10−6m2/Vs have been estimated for hole and electron mobilities for hexagonally packed, columnar structures of the spin-coated films. These results are exploitable for development of single molecule based all organic complimentary analogue and digital circuits with tunable field effect performance.

Original language	English
Article number	095010
Journal	Semiconductor Science and Technology
Volume	33
Early online date	18 Jul 2018
DOIs	https://doi.org/10.1088/1361-6641/aad42d
Publication status	Published - 3 Aug 2018

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Cite this

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title = "Newly synthesised gadolinium bis-phthalocyanine sandwich complex: Ambipolar organic semiconductor",

abstract = "Time of flight (TOF) photocurrent transient studies on 5µm thick solution processed films of novel non-peripherally octa-octyl-substituted liquid crystalline gadolinium bis-1,4,8,11,15,18,22,25-octakis(octyl) phthalocyanines (8GdPc2) provide a quantitative analysis of the intrinsic ambipolar charge transport relative to mesomorphic structure of this lanthanide compound. Characteristic liquid crystalline phases of these molecules have been identified from differential scanning calorimetry supported by observation from the UV-visible absorption, showing crystal-columnar mesophase and columnar mesophase-isotropic liquid transitions at 64.2°C and 162°C, respectively. The TOF carrier mobility is found to be structure dependent and highest values of 4.73×10−6m2/Vs and 1.6×10−6m2/Vs have been estimated for hole and electron mobilities for hexagonally packed, columnar structures of the spin-coated films. These results are exploitable for development of single molecule based all organic complimentary analogue and digital circuits with tunable field effect performance.",

author = "Seema Barad and Theo Kreouzis and Cammidge, {Andrew N.} and Cook, {Michael J.} and Ray, {Asim K.}",

year = "2018",

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doi = "10.1088/1361-6641/aad42d",

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T1 - Newly synthesised gadolinium bis-phthalocyanine sandwich complex: Ambipolar organic semiconductor

AU - Barad, Seema

AU - Kreouzis, Theo

AU - Cammidge, Andrew N.

AU - Cook, Michael J.

AU - Ray, Asim K.

PY - 2018/8/3

Y1 - 2018/8/3

N2 - Time of flight (TOF) photocurrent transient studies on 5µm thick solution processed films of novel non-peripherally octa-octyl-substituted liquid crystalline gadolinium bis-1,4,8,11,15,18,22,25-octakis(octyl) phthalocyanines (8GdPc2) provide a quantitative analysis of the intrinsic ambipolar charge transport relative to mesomorphic structure of this lanthanide compound. Characteristic liquid crystalline phases of these molecules have been identified from differential scanning calorimetry supported by observation from the UV-visible absorption, showing crystal-columnar mesophase and columnar mesophase-isotropic liquid transitions at 64.2°C and 162°C, respectively. The TOF carrier mobility is found to be structure dependent and highest values of 4.73×10−6m2/Vs and 1.6×10−6m2/Vs have been estimated for hole and electron mobilities for hexagonally packed, columnar structures of the spin-coated films. These results are exploitable for development of single molecule based all organic complimentary analogue and digital circuits with tunable field effect performance.

AB - Time of flight (TOF) photocurrent transient studies on 5µm thick solution processed films of novel non-peripherally octa-octyl-substituted liquid crystalline gadolinium bis-1,4,8,11,15,18,22,25-octakis(octyl) phthalocyanines (8GdPc2) provide a quantitative analysis of the intrinsic ambipolar charge transport relative to mesomorphic structure of this lanthanide compound. Characteristic liquid crystalline phases of these molecules have been identified from differential scanning calorimetry supported by observation from the UV-visible absorption, showing crystal-columnar mesophase and columnar mesophase-isotropic liquid transitions at 64.2°C and 162°C, respectively. The TOF carrier mobility is found to be structure dependent and highest values of 4.73×10−6m2/Vs and 1.6×10−6m2/Vs have been estimated for hole and electron mobilities for hexagonally packed, columnar structures of the spin-coated films. These results are exploitable for development of single molecule based all organic complimentary analogue and digital circuits with tunable field effect performance.

U2 - 10.1088/1361-6641/aad42d

DO - 10.1088/1361-6641/aad42d

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JO - Semiconductor Science and Technology

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SN - 0268-1242

M1 - 095010

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