期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 31, 页码 28138-28144出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b11370
关键词
organic electrochemical transistor; fullerene; small-molecule semiconductor; bioelectronics; n-type semiconductor
资金
- National Science Foundation [NSF DMR-1607242, ECC-1542101]
- NSF DMREF Award [1629369]
- National Natural Science Foundation of China [21722404, 21674093]
- University of Washington
- Molecular Engineering AMP
- Sciences Institute
- Clean Energy Institute
- National Institutes of Health
- DOE Office of Science User Facility [DE-AC02-05CH11231]
Organic electrochemical transistors (OECTs) are currently being developed for applications ranging from bioelectronics to neuromorphic computing. We show that fullerene derivatives with glycolated side chains can serve as n-type active layers for OECTs with figures of merit exceeding the best reported conjugated-polymer-based n-type OECTs. By comparing two different fullerene derivatives, [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) and 2-(2,3,4-tris(methoxtriglycol) phenyl) [60]fulleropyrrolidine (C60-TEG), we find that the hydrophilic glycolated side chains in C60-TEG enable volumetric doping of C60-TEG films. In contrast, the hydrophobic nature of PCBM prevents ions from penetrating into the material. Our results demonstrate that small-molecule semiconductors follow many of the same design principles established for conjugated polymers and can function as high-performing mixed electronic/ionic conductors for efficient, fast OECTs.
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