[10p-C310-1~15] 3.1 Basic optics and frontier of optics

4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[10p-C310-9] Analysis of P3HT Molecular Orientation Using Microscopic Raman Spectroscopy
with Liquid Crystal Z-Polarization Elements

〇Tomoki Shimada¹, Yuika Saito¹, Yuki Takeuchi¹, Yusaku Sunohara¹, Yuta Taguchi² (1.Gakushuin Univ., 2.Tokyo Univ.)

Keywords:

Molecular orientation,Microscopic Raman,Polarization

In this study, we developed a method for analyzing the molecular orientation of the organic semiconductor polymer P3HT using polarized microscopic Raman spectroscopy with a liquid crystal Z-polarization element. By using azimuthal and radial polarization, we evaluated the Z-polarization component of the optical system from graphene measurements, and then calculated the orientation angles by comparing simulations using Gaussian16 and Physon with experimental results. As a result, we found that the P3HT crystals had orientation angles concentrated around 0–15°, with an edge-on orientation being dominant. This mostly aligns with previous studies, demonstrating the effectiveness of our method.