| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Atomistic Insights into Isomeric Effects on Donor-Acceptor Nanomorphological Arrangements in Non-fullerene Organic Solar Cells |
| 초록 |
Donoracceptor intermolecular interactions and/or arrangements are key factors determining the performance of organic solar cells (OSCs). Herein, two ITIC-based isomeric acceptors (o-F-ITIC and m-F-ITIC) with ortho and meta positions of fluorine atoms within the side chains were developed. The developed acceptors showed different interactions and/or arrangements with the donor counterpart (PBDB-T), which caused a significant variation in the power conversion efficiency (PCE) of OSCs. The PCE for the PBDB-T:o-F-ITIC device was 11.11% versus 8.90% for the PBDB-T:m-F-ITIC device. A detailed theoretical analysis of the intermolecular complexes formed between the F-ITICs and the PBDB-T allow to disentangle how two isomeric acceptors interact differently with PBDB-T. Relative to PBDB-T:m-F-ITIC with a preferential DCIBDD complex, PBDB-T:o-F-ITIC showed a closer donoracceptor interaction, with a tightly packed parallel-like DCIBDT complex, resulting in larger interface areas. |
| 저자 |
이정호, 고은민, 이상면, 정민규, 이규철, 오지연, 조용준, 곽상규, 양창덕
|
| 소속 |
UNIST |
| 키워드 |
atomistic simulations; constitutional isomers; donor-acceptor interaction; fluorination effect; non-fullerene acceptor
|
| E-Mail |
|
