Carrier transport and device applications of the organic semiconductor based on liquid crystalline non-peripheral octaalkyl phthalocyanine

ABSTRACT

The molecular packing and electronic transport characteristics of mesogenic phthalocyanines having alkyl side chains at non-peripheral sites, 1,4,8,11,15,18,22,25-octaalkylphthalocyanine and its families, are described. These compounds exhibit very high long-range drift mobility up to 1.4 cm²/Vs evaluated by time of flight measurement and must be a candidate of organic semiconductor for printable electronics. We also describe possibilities of application to electronic devices such as solar cells and transistors. In addition, we report on a method for fabricating a highly oriented organic semiconductor thin film utilising latent mesogenic characteristics of the molecules.

GRAPHICAL ABSTRACT

KEYWORDS:

• Phthalocyanine
• discotic liquid crystal
• organic semiconductor
• carrier mobility
• photovoltaic device

Acknowledgements

This work was partly supported by the Advanced Low Carbon Technology Research and Development Program of the Japan Science and Technology Agency (JST-ALCA), JSPS KAKENHI (Grant Number 15H03552, 18H04514) and the JSPS Core-to-Core Program, A. Advanced Research Networks.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Advanced Low Carbon Technology Research and Development Program;Japan Society for the Promotion of Science [15H03552,18H04514].