| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터) |
| 권호 |
43권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Performance Improvement of Low-Temperature Processed Perovskite Solar Cells by Molecular Engineering of Porphyrin based Hole Transport Materials |
| 초록 |
Porphyrin derivatives have widely utilized in the state-of-art photovoltaic cells. However, porphyrins as hole transporting materials (HTMs) in perovskite solar cells (PSCs) are not much studied and remained as a challenging issue. In this work, we synthesized novel fluorinated porphyrin small molecules, PZn-2FDA and PZn-3FDA, as a HTM for high-efficiency PSCs. The fluorination gave a significant effect on the energy levels and intermolecular ordering. The fluorination and increased the intermolecular π-π stacking and effectively down-shifted HOMO energy levels of porphyrin based HTMs, which allows higher hole mobility and better energy level alignment with perovskite layer, respectively. By the molecular engineering via fluorination on porphyrin, we could realize the highly efficient power conversion of 18.85% in low temperature processed PSCs, and notably this is the highest values among the porphyrin HTMs based PSCs. |
| 저자 |
이운학1, 엄승훈2, 장성연3, 정인환3, 김범준1, 윤성철2
|
| 소속 |
1KAIST, 2KRICT, 3국민대 |
| 키워드 |
porphyrin; hole transporting materials;
|
| E-Mail |
|
