Phys.org August 26, 2022
The performance of organic optoelectronic and energy-harvesting devices is largely determined by the molecular orientation and resultant permanent dipole moment, yet this property is difficult to control during film preparation. Researchers in Japan have demonstrated the active control of dipole direction in organic glassy films by physical vapour deposition. It was obtained by utilizing the small surface free energy of a trifluoromethyl unit and intramolecular permanent dipole moment induced by functional groups. According to the researchers their work could pave a way toward the formation of spontaneously polarized organic glassy films, leading to improvement in the performance of organic molecular devices…read more. TECHNICAL ARTICLEÂ
Spontaneous orientation of proposed F-based molecules. Credit: Nature Materials volume 21, pages819–825 (2022)Â