Optimization of thermal treatment of vapor-deposited thiophene/phenylene co-oligomer films

Crystallization of thiophene/phenylene co-oligomers by dropping of their solutions into poor solvents

“…This is responsible for the layered structures consisting of vertical molecular alignment. The as-deposited BP1T film was reported to be a micro-crystal and its XRD profile presented not only order reflection but also non-order peaks [7]. The crystal obtained in the present study was demonstrated to have a highly ordered structure.…”

“…We have been studying the preparation process of TPCO crystals using vapor deposition [7,8]. Vapor deposition is one of the practical processes for the fabrication of organic electronic devices, and can be utilized for covering the entire surface of a substrate with organic material.…”

Large gain for crystalline thin films of thiophene/phenylene co-oligomer by photopumping with femtosecond laser pulses

“…The rate of vapor deposition was varied from 0.1 to 10 Å/s; however, no difference was observed in the film morphology. The differential scanning calorimetry confirmed that the films were crystalline not amorphous [7].…”

“…Although the BP1T film caused macroscopic scattering before thermal treatment, it became macroscopically transparent after thermal treatment, because domains around 300 μm in size do not produce macroscopic scattering. The growth of crystalline domains by thermal treatment is ascribed to strain energy stored in the deposited films [7]. The strain energy is closely related to molecular structures and melting points.…”

“…Therefore, the organic single crystals are not sufficiently productive. In contrast, organic crystalline films are easily produced by thermal treatment of their vapor deposited films [7], and vapor deposition is usually used to fabricate organic devices. This allows the entire surface of a patterned substrate to be coated with the organic compound and the evaporated film to be crystallized on the patterned electrode.…”