Thienoisoindigo-Based Semiconductor Nanowires Assembled with 2-Bromobenzaldehyde via Both Halogen and Chalcogen Bonding
- Authors
- Noh, Juran; Jung, Sungwoo; Koo, Dong Geon; Kim, Gyoungsik; Choi, Kyoung Soon; Park, JaeHong; Shin, Tae Joo; Yang, Changduk; Park, Juhyun
- Issue Date
- Sep-2018
- Publisher
- Nature Publishing Group
- Citation
- Scientific Reports, v.8, no.1
- Journal Title
- Scientific Reports
- Volume
- 8
- Number
- 1
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/3211
- DOI
- 10.1038/s41598-018-32486-z
- ISSN
- 2045-2322
- Abstract
- We fabricated nanowires of a conjugated oligomer and applied them to organic field-effect transistors (OFETs). The supramolecular assemblies of a thienoisoindigo-based small molecular organic semiconductor (TIIG-Bz) were prepared by co-precipitation with 2-bromobenzaldehyde (2-BBA) via a combination of halogen bonding (XB) between the bromide in 2-BBA and electron-donor groups in TIIG-Bz, and chalcogen bonding (CB) between the aldehyde in 2-BBA and sulfur in TIIG-Bz. It was found that 2-BBA could be incorporated into the conjugated planes of TIIG-Bz via XB and CB pairs, thereby increasing the π − π stacking area between the conjugated planes. As a result, the driving force for one-dimensional growth of the supramolecular assemblies via π − π stacking was significantly enhanced. TIIG-Bz/2-BBA nanowires were used to fabricate OFETs, showing significantly enhanced charge transfer mobility compared to OFETs based on pure TIIG-Bz thin films and nanowires, which demonstrates the benefit of nanowire fabrication using 2-BBA. © 2018, The Author(s).
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