Agradecimentos: This work was financially supported by FAPESP (2010/20094-1, 2017/06534-8), CNPq (422163/2018-0 and 304836/2018-4), CAPES, and National Institute for Science and Technology on Organic Electronics (INEO) (CNPq process number 465572/2014-6, FAPESP 2014/50869-6, and CAPES...

Agradecimentos: This work was financially supported by FAPESP (2010/20094-1, 2017/06534-8), CNPq (422163/2018-0 and 304836/2018-4), CAPES, and National Institute for Science and Technology on Organic Electronics (INEO) (CNPq process number 465572/2014-6, FAPESP 2014/50869-6, and CAPES 23038.000776/201754). We thank Dr Ricardo Aroca, Professor Emeritus of the University of Windsor, Canada, for helping with the discussion

Abstract: Organic thin films are an essential component of the structure of optical and electronic devices. However, the optical and electrical properties of these films depend on their supramolecular architecture, which may vary according to the techniques used to manufacture them. Here, the...

Abstract: Organic thin films are an essential component of the structure of optical and electronic devices. However, the optical and electrical properties of these films depend on their supramolecular architecture, which may vary according to the techniques used to manufacture them. Here, the correlation between conductivity and supramolecular architecture was investigated. The supramolecular architecture was analyzed in terms of the molecular organization and J- or H-aggregation established during the fabrication of perylene tetracarboxylic diimide (PTCD) nanometric films. Three deposition techniques, Langmuir-Schaefer (LS), Langmuir-Blodgett (LB), and Physical Vapor Deposition (PVD), were evaluated. The UV-vis absorption spectra indicated that LS, LB, and PVD films grow homogeneously. Also, the presence of J and H aggregates was observed for all films, the H aggregates prevailing for the LB film. The FTIR measurements suggested that the molecular organization is similar for LS and LB films, with a tendency to form head-on organization onto a solid substrate. For the PVD film, the perylene macrocycles are inclined approximately 45 degrees relative to the substrate. AFM measurements indicated a homogenous surface for all films. In terms of electrical conductivity, the highest conductivity was found for LS, followed by LB and PVD. The conductivity values were interpreted in terms of molecular organization and J- or H-aggregate formation

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2010/20094-1; 2014/50869-6; 2017/06534-8

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

465572/2014-6; 304836/2018-4; 422163/2018-0

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

23038.000776/201754

Fechado