A high-performance organic field-effect transistor based on platinum(II) porphyrin : Peripheral substituents on porphyrin ligand significantly affect film structure and charge mobility

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chi-Ming Che
  • Hai-Feng Xiang
  • Stephen Sin-Yin Chui
  • Zong-Xiang Xu
  • Jessie Jing Yan
  • Wen-Fu Fu
  • P. T. Lai
  • Ian D. Williams

Detail(s)

Original languageEnglish
Pages (from-to)1092-1103
Journal / PublicationChemistry - An Asian Journal
Volume3
Issue number7
Publication statusPublished - 7 Jul 2008
Externally publishedYes

Abstract

Organic field-effect transistors incorporating planar π-conjugated metal-free macrocycles and their metal derivatives are fabricated by vacuum deposition. The crystal structures of [H2(OX)] (H2OX= etioporphyrin-I), [Cu(OX)], [Pt(OX)], and [Pt(TBP)] (H2TBP=tetra-(n- butyl)porphyrin) as determined by single crystal X-ray diffraction (XRD), reveal the absence of occluded solvent molecules. The field-effect transistors (FETs) made from thin films of all these metal-free macrocycles and their metal derivatives show a p-type semiconductor behavior with a charge mobility (μ) ranging from 10-6 to 10-1 cm2V-1 s-1. Annealing the as-deposited Pt(OX) film leads to the formation of a polycrystalline film that exhibits excellent overall charge transport properties with a charge mobility of up to 3.2×10-1 cm 2V-1 s-1, which is the best value reported for a metalloporphyrin. Compared with their metal derivatives, the field-effect transistors made from thin films of metal-free macrocycles (except tetra-(n-propyl)porphycene) have significantly lower μ values (3.0×10-6-3.7×10-5 cm2V -1 s-1). © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

Research Area(s)

  • Macrocyclic ligands, Materials science, Molecular electronics, OFET (organic field-effect transistor), X-ray diffraction

Citation Format(s)

A high-performance organic field-effect transistor based on platinum(II) porphyrin : Peripheral substituents on porphyrin ligand significantly affect film structure and charge mobility. / Che, Chi-Ming; Xiang, Hai-Feng; Chui, Stephen Sin-Yin; Xu, Zong-Xiang; Roy, V. A L; Yan, Jessie Jing; Fu, Wen-Fu; Lai, P. T.; Williams, Ian D.

In: Chemistry - An Asian Journal, Vol. 3, No. 7, 07.07.2008, p. 1092-1103.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review