화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2014년 가을 (10/06 ~ 10/08, 제주 ICC)
권호 39권 2호
발표분야 분자전자 부문위원회
제목 Efficient Diketopyrrolopyrrole-Based Small-Molecule Bulk-Heterojunction Solar Cells with Different Electron-Donating End-Groups
초록 A series of small molecules that contained identical p-spacers,a central DPP unit,and different aromatic electron-donating end-groups were synthesized and used in organic solar cells to study the effect of electrondonating groups on the device performance. DPP-A-An, which contained anthracene end-groups, demonstrated a stronger absorbance and a higher hole mobility than DPP-A-Ph, which contained phenyl groups, and DPP-A-Na, which contained naphthalene units.The power-conversion efficiencies of OSCs based on organic:PC71BM blends with a processed DIO additive were 3.93% for DPP-A-An, 3.02% for DPP-Na, and 2.26% for DPP-A-Ph. These findings suggest that a DPP core that is functionalized with electron-donating capping groups constitutes a promising new class of solution-processable small molecules for OSC applications.
저자 백장열1, 김유진2, 전찬우1, 박찬언2, 김윤희1
소속 1경상대, 2포항공대 화학공학과
키워드 absorption · alkynes · conjugation · cross-coupling · solar cells
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