Building-up relations between intra- and intermolecular interactions, miscibility, and performance for low-cost, efficient fully non-fused acceptor-based organic solar cells
- Author(s)
-
Kim, Wonjun, Oh, Jiyeon, Park, Jeewon, Sun, Zhe, Park, Jaeyeong, Mai, Thi Le Huyen, Kim, Seoyoung, Yang, Changduk
- Issued Date
-
2023-12
- DOI
-
10.1016/j.nanoen.2023.108853
- URI
-
https://scholarworks.unist.ac.kr/handle/201301/66068
- Citation
-
NANO ENERGY, v.117, pp.108853
- Abstract
-
Although the molecular electronic forces (e.g., intra- and intermolecular interactions) within active layers largely govern the device performance of organic solar cells (OSCs), they are complicated and less understood. In this study, we have synthesized two low-cost isomeric non-fused acceptors (TT-Naph1 and TT-Naph2) with 1-naphthyl and 2-naphthyl aromatic chains, respectively and quantified the molecular interaction-photovoltaic performance relationship. Benefiting from the enhanced dipole moment, TT-Naph2 possesses a strong dipole-dipole intermolecular interaction, while the improved backbone planarity endows TT-Naph1 with a strengthened intramolecular charge-transfer effect, which can regulate the desired blend morphology with the D18 donor polymer as a result of its low miscibility with D18. Less miscible nanostructures are more pronounced in the layer-by-layer (LBL) systems than bulk heterojunction (BHJ) ones, increasing the power conversion efficiencies (PCEs) in the sequence of TT-Naph2 BHJ < TT-Naph1 BHJ < TT-Naph2 LBL < TT-Naph1 LBL. Notably, a ternary LBL OSC based on TT-Naph1 achieved remarkable PCE of 18.41%, one of the top values for LBL-type OSCs. Our findings provide insights into the controlling effect of intra- and intermolecular interactions on the active layers for efficient non-fused acceptor-based OSCs.
- Publisher
-
ELSEVIER
- ISSN
-
2211-2855
- Keyword (Author)
-
Non-fused acceptors, Organic solar cells, Intermolecular interaction, Intramolecular charge transfer, Low cost, Miscibility
- Keyword
-
NONFULLERENE ACCEPTORS, MORPHOLOGY
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.