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- Title
Butterfly‐like Shape Liquid Crystals Based Fused‐Thiophene as Unidimensional Ambipolar Organic Semiconductors with High Mobility.
- Authors
Ma, Tao; Zhong, Yu‐Jie; Wang, Hai‐Feng; Zhao, Ke‐Qing; Wang, Bi‐Qin; Hu, Ping; Monobe, Hirosato; Donnio, Bertrand
- Abstract
Mesomorphous butterfly‐like shape molecules based on benzodithiophene, benzodithiophene‐4,8‐dione and cyclopentadithiophen‐4‐one core moieties were efficiently synthesized by the Suzuki‐Miyaura coupling and Scholl oxidative cyclo‐dehydrogenation reactions' tandem. Most of the butterfly molecules spontaneously self‐organize into columnar hexagonal mesophase. The electron‐deficient systems possess strong solvent‐gelling ability but are not luminescent, whereas the electron‐rich terms do not form gels but strongly emit light between 400 and 600 nm. The charge carrier mobility was also measured by time‐of‐flight transient photocurrent technique in the mesophases for some of the compounds. They display hole‐transport performances with positive charge mobility in the 10−3 cm−2 V−1 s−1 range, consistent with the high degree of ordering and stability of the columnar superstructures. In particular, the mesogen with a benzodithiophen‐4,8‐dione core shows ambipolar charge carrier transport with both high electron (μe=6.6×10−3 cm−2 V−1 s−1) and hole (μh=4.5×10−3 cm−2 V−1 s−1) mobility values.
- Subjects
LIQUID crystals; MOLECULAR shapes; CHARGE carrier mobility; ORGANIC semiconductors; CHARGE carriers; MESOPHASES
- Publication
Chemistry - An Asian Journal, 2021, Vol 16, Issue 9, p1106
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.202100173