What They Say
IDTechEx sent out a mail about some new developments including OLED materials. It highlights developments in TADF materials and said it was impressed with the host materials developed by early-stage US firm Molecular Glasses. This host material increases the solubility of dopant molecules, be they fluorescent, phosphorescent or TADF, while retaining charge transport capabilities.
This is achieved by making the host material from a wide range of subtly different chemical structures, known as an isomeric mixture. Crystallization of the host material is prevented and emissive dopant molecules are more evenly dispersed, thus avoiding aggregation. This in turn reduces interaction between charges and excitons prior to light emission, improving luminescent efficiency
What We Think
It’s beyond my technical abilities to comment on the details of the firm’s materials, but for those of you that are interested, there is a list of the firm’s technical publications here. However, there is no doubt that while major breakthroughs in materials are desired and needed, there is also room for improvement in all parts of the structures of OLEDs. I’m fond of the old Scottish saying ‘Many a mickle macks a muckle!’. It means that many small changes can build up into a big change. (BR)
