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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Intermolecular Structural Differences of Poly(3-hexylthiophene) Probed by Polarized Raman Spectroscopy and Theoretical Calculation

등록일
2018년 8월 30일 14시 00분 58초
접수번호
2053
발표코드
PHYS.P-320 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 19일 (금요일) 11:00~12:30
발표형식
포스터
발표분야
Physical Chemistry
저자 및
공동저자
Juwon Kim, Yeonsu Jeong, Yourim Song, E Na Yun, Myeongkee Park*
Department of Chemistry, Dong-A University, Korea

A conductive polymer, poly(3-hexyl-thiophene) has been widely used for photovoltaic applications. Its good conductivity is originated from polaron pair formation assisted by intramolecular pi-conjugated electrons in the backbone and intermolecular pi-pi interactions. These intra- and inter-molecular pi interactions may affect C=C and C–C Raman features shown at ~1370 and ~1450 cm-1, since they are correlated to molecular structural orderings and randomness. Against these backdrops, here we have examined the depolarization ratio (r) of C=C and C–C vibration Raman modes of the ordered (annealed, r=~0.3) and disordered (non-annealed, r=~0.2) P3HT films. We also have confirmed that the depolarized ratio clearly reflects different intermolecular structures using MP2/6-31g(d, p) theory.


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