期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201905963
关键词
blade coating; crystal growth; organic transistors; semiconductor morphology
类别
资金
- General Research Fund (GRF)
- HKU [17204517, HKU 17264016]
- Collaborative Research Fund (CRF) [C704514E]
Meniscus-guided coating (MGC) is mainly applicable on the soluble organic semiconductors with strong pi-pi overlap for achieving single-crystalline organic thin films and high-performance organic field-effect-transistors (OFETs). In this work, four elementary factors including shearing speed (v), solute concentration (c), deposition temperature (T), and solvent boiling point (T-b) are unified to analyze crystal growth behavior in the meniscus-guided coating. By carefully varying and studying these four key factors, it is confirmed that v is the thickness regulation factor, while c is proportional to crystal growth rate. The MGC crystal growth rate is also correlated to latent heat (L) of solvents and deposition temperature in an Arrhenius form. The latent heat of solvents is proportional to T-b. The OFET channels grown by the optimized MGC parameters show uniform crystal morphology (Roughness R-q < 0.25 nm) with decent carrier mobilities (average mu = 5.88 cm(2) V-1 s(-1) and highest mu = 7.68 cm(2) V-1 s(-1)). The studies provide a generalized formula to estimate the effects of these fabrication parameters, which can serve as crystal growth guidelines for the MGC approach. It is also an important cornerstone towards scaling up the OFETs for the sophisticated organic circuits or mass production.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据