화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO))
권호 44권 1호
발표분야 기능성 고분자
제목 Excited-State Dynamics Study of Ternary Blend Organic Solar Cells Containing a Low-Bandgap Non-Fullerene Acceptor
초록 To clarify the effect of a low-bandgap non-fullerene acceptor (NFA) on a power conversion efficiency (PCE) of ternary blend organic solar cells (OSCs), we investigated the excited-state dynamics in ternary blend systems composed of a donor-acceptor wide-bandgap polymer based on a benzodithiophene backbone (PBT-OTT), PC71BM, and ITIC using femtosecond transient absorption (fsTA) spectroscopy. We found the unique formation-pathway of ITIC-generated free carriers, which increases the PCE of ternary blend NFA OSCs more effectively than does the hole transfer from ITIC to PBT-OTT. Our findings of the charge-carrier dynamics in the ternary blend system may provide the important information that may lead to further increase in the PCE of OSCs.
저자 이동기, 이한솔, 최욱진, 박찬의, 조길원
소속 포항공과대
키워드 non-fullerene acceptor; ternary blend organic solar cell; transient absorption
E-Mail kwcho@postech.ac.kr