Large Domain Growth of N,N′-bis(octyl)-1,4,5,8- naphthalenetetracarboxylicdiimide Film by Annealing Under Sealed Condition

ABSTRACT

A novel method of “sealed annealing” was proposed to obtain large crystalline domains in organic deposited films. The deposited film of naphthalene tetracarboxylic derivative having long alkyl chains (NTCDI-C8H) was annealed with a cover substrate put on it near the melting point. The cover substrate prevented melting or sublimation of the deposited film, resulting in a growth of large domains having a size reaching several hundreds microns, which can be clearly observed by a polarizing microscope.

Keywords:

• anneling
• crystalline domains
• naphthalene tetracarboxylic derivative
• organic field effect transistors