[6p-A504-1~9] 12.2 Characterization and Materials Physics

[6p-A504-3] The Impact of Kinetically Restricted Orientation on Thermal Conversion of Zinc Tetraphenylporphyrin Thin Films to the Triclinic and Monoclinic Phases

〇Nobutaka Shioya¹, Takafumi Shimoaka¹, Richard Murdey¹, Kazuo Eda², Takeshi Hasegawa¹ (1.Kyoto Univ., 2.Kobe Univ.)

Keywords:porphyrin, pMAIRS, GIXD

Porphyrin has a functionalized skeleton and its derivatives (e.g., zinc tetraphenylporphyrin; ZnTPP) are employed to make an active layer in organic photovoltaic devices. Since the device performance strongly depends on the molecular aggregation structure represented by the molecular orientation in the thin film, both analysis and control of the molecular anisotropic structure are of great importance. The structural analysis of the ZnTPP thin film, however, is very limited, although many studies have been reported on the device application. In the present study, the powerful combination of p-polarized multiple-angle incidence of resolution spectrometry (pMAIRS) and grazing X-ray diffraction (GIXD) is applied for the structural analysis of ZnTPP thin films prepared as a function of the deposition rate. As a result, the deposition rate is found to have an impact on the film structure and its thermal conversion.