[20a-W242-1~11] 12.1 Fabrications and Structure Controls

△ [20a-W242-11] Structure Analysis of an Organic Semiconductor Thin Film Using IR pMAIRS

〇Nobutaka Shioya¹, Miyako Hada¹, Takafumi Shimoaka¹, Kazuo Eda², Takeshi Hasegawa¹ (1.ICR, Kyoto Univ., 2.Kobe Univ.)

Keywords:IR pMAIRS,poly(3-hexylthiophene),molecular orientation

Organic semiconductors represented by poly(3-hexylthiophene-2,5-diyl) (P3HT) is employed as an active materials in organic field effect transistors and organic photovoltaic due to the high carrier mobility in the thin film. The device performance strongly depends on the molecular aggregation structure influenced by the molecular orientation and the crystallinity in the organic semiconductor thin film. The chemical mechanism is, however, still remained within a speculation: the correlation between the primary molecular structure and the molecular orientation has not been fully understood. In the present study, the chemical mechanism to control the molecular orientation has been revealed by using Infrared (IR) p-polarized multiple-angle incidence resolution spectrometry (pMAIRS).