揭建胜教授课题组在Adv. Mater. 上发表论文

发布时间:2021-03-18访问量:21设置

题目:

Water-Surface Drag Coating: A New Route Toward High-Quality Conjugated Small-Molecule Thin Films with Enhanced Charge Transport Properties

作者:

Wei Deng1, Yanling Xiao1, Bei Lu1, Liang Zhang1, Yujian Xia1, Chenhui Zhu2, Xiujuan Zhang1, Jinghua Guo2, Xiaohong Zhang1, and Jiansheng Jie*, 1

单位:

1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China

2Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

摘要:

Electronic properties of organic semiconductor (OSC) thin films are largely determined by their morphologies and crystallinities. However, solution-processed conjugated small-molecule OSC thin films usually exhibit abundant grain boundaries and impure grain orientations because of complex fluid dynamics during solution coating. Here, a novel methodology, water-surface drag coating, is demonstrated to fabricate high-quality OSC thin films with greatly enhanced charge transport properties. This method utilizes the water surface to alter the evaporation dynamics of solution to enlarge the grain size, and a unique drag-coating process to achieve the unidirectional growth of organic crystals. Using 2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene (Dif-TES-ADT) as an example, thin films with millimeter-sized single-crystal domains and pure crystallographic orientations are achieved, revealing a significant enhancement (4.7 times) of carrier mobility. More importantly, the resulting film can be directly transferred onto any desired flexible substrates, and flexible transistors based on the Dif-TES-ADT thin films show a mobility as high as 16.1 cm2 V−1 s−1, which represents the highest mobility value for the flexible transistors reported thus far. The method is general for the growth of various high-quality OSC thin films, thus opening up opportunities for high-performance organic flexible electronics.

影响因子:

27.398

分区情况:

一区

链接:

https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202005915?af=R


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