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- Title
Cyano‐Functionalized Quinoxaline‐Based Polymer Acceptors for All‐Polymer Solar Cells and Organic Transistors.
- Authors
You, Hoseon; Kang, Hyunbum; Kim, Donguk; Park, Jin Su; Lee, Jin‐Woo; Lee, Seungjin; Kim, Felix Sunjoo; Kim, Bumjoon J.
- Abstract
Quinoxaline (Qx) derivatives are promising building units for efficient photovoltaic polymers owing to their strong light absorption and high charge‐transport abilities, but they have been used exclusively in the construction of polymer donors. Herein, for the first time, Qx‐based polymer acceptors (PAs) were developed by introducing electron‐withdrawing cyano (CN) groups into the Qx moiety (QxCN). A series of QxCN‐based PAs, P(QxCN‐T2), P(QxCN‐TVT), and P(QxCN‐T3), were synthesized by copolymerizing the QxCN unit with bithiophene, (E)‐1,2‐di(thiophene‐2‐yl)ethene, and terthiophene, respectively. All of the PAs exhibited unipolar n‐type characteristics with organic field‐effect transistor (OFET) mobilities of around 10−2 cm2 V−1 s−1. In space‐charge‐limited current devices, P(QxCN‐T2) and P(QxCN‐TVT) exhibited electron mobilities greater than 1.0×10−4 cm2 V−1 s−1, due to the well‐ordered structure with tight π‐π stacking. When the PAs were applied in all‐polymer solar cells (all‐PSCs), the highest performance of 5.32 % was achieved in the P(QxCN‐T2)‐based device. These results demonstrate the significant potential of Qx‐based PAs for high‐performance all‐PSCs and OFETs.
- Subjects
PHOTOVOLTAIC power systems; SOLAR cells; ORGANIC field-effect transistors; TRANSISTORS; POLYMERS; ELECTRON mobility
- Publication
ChemSusChem, 2021, Vol 14, Issue 17, p3520
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.202100080