Structure control of a zinc tetraphenylporphyrin thin film by vapor annealing using fluorine containing solvent

THIN SOLID FILMS

卷:665

Article

Tomita, Kazutaka¹  Shioya, Nobutaka¹  Kise, Ryuma¹  Shimoaka, Takafumi¹  Yoshida, Hiroyuki^2,3  Koganezawa, Tomoyuki⁴  Eda, Kazuo⁵  Hasegawa, Takeshi¹ 

[1] Kyoto Univ, Inst Chem Res, Div Environm Chem, Lab Chem Functionalized Surfaces, Uji, Kyoto 6110011, Japan

[2] Chiba Univ, Grad Sch Engn, Inage Ku, 1-33 Yayoi Cho, Chiba 2638522, Japan

[3] Chiba Univ, Mol Chiral Res Ctr, Inage Ku, 1-33 Yayoi Cho, Chiba 2638522, Japan

[4] Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo Cho, Hyogo 6795198, Japan

[5] Kobe Univ, Grad Sch Sci, Dept Chem, Nada Ku, 1-1 Rokko Dai, Kobe, Hyogo 6578501, Japan

关键词: Solvent vapor annealing;    Two-dimensional grazing incidence X-ray diffraction;    P-polarized multiple-angle incidence resolution spectrometry;    Molecular orientation;    Porphyrin;    Fluorine containing solvent;    Organic semiconductor;    Thin film;   

DOI  :  10.1016/j.tsf.2018.09.015

来源: Elsevier

【 摘 要 】

The solvent vapor annealing (SVA) technique is one of the useful post processing techniques of a thin film, which is an alternative technique of the thermal annealing one. SVA has a great advantage that the molecular rearrangement in the film is made moderately by employing an appropriate solvent without the sample heating. The moderate processing is expected to yield a benefit that the molecular coalescence would be suppressed, which would readily keep the continuous surface topography of the film during the annealing, and another benefit that a metastable structure would be obtained. To make the best use of the SVA-specific characteristics, in the present study, a material having a metastable structure is chosen. The sample is zinc tetraphenylporphyrin (ZnTPP) that yields a metastable triclinic crystal structure, which can easily be converted to a monoclinic crystal structure by thermal annealing. A triclinic-structure film of ZnTPP by the combination of a wet process and the thermal annealing has thus never been reported. By choosing a fluorine-containing solvent, which has a low affinity to ZnTPP, a triclinic-structure film has first been obtained by a wet process while the surface continuity is protected.

【 授权许可】

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