Bischak Connor G, Flagg Lucas Q, Yan Kangrong, Li Chang-Zhi, Ginger David S
Department of Chemistry , University of Washington , Seattle , Washington 98195-1700 , United States.
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , P.R. China.
ACS Appl Mater Interfaces. 2019 Aug 7;11(31):28138-28144. doi: 10.1021/acsami.9b11370. Epub 2019 Jul 26.
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-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.
有机电化学晶体管（OECTs）目前正在被开发用于从生物电子学到神经形态计算等一系列应用。我们表明，具有糖基化侧链的富勒烯衍生物可以用作OECTs的n型活性层，其优值超过了报道的基于共轭聚合物最佳的n型OECTs。通过比较两种不同的富勒烯衍生物，[6,6]-苯基-C-丁酸甲酯（PCBM）和2-(2,3,4-三(甲氧基三甘醇)苯基)[60]富勒吡咯烷（C60-TEG），我们发现C60-TEG中亲水性的糖基化侧链能够使C60-TEG薄膜进行体相掺杂。相比之下，PCBM的疏水性阻止离子渗透到材料中。我们的结果表明，小分子半导体遵循许多为共轭聚合物确立的相同设计原则，并且可以作为高效、快速的OECTs的高性能混合电子/离子导体。
