Researchers from the Technical University in Dresden have developed a method to produce polymer TADF emitting molecules. Up until now most TADF materials are based on small molecules or chromophores linked to a polymer network.

This research focused on actual polymer TADF, and using a controlled extension of the conjugation of the monomers HOMO wavefunction, the researchers were able to to increase thephotoluminescence quantum yield from about 3% to about 71%. The reseachers say that this is an encouraging first step towards polymer TADF emitters.

TADF is considered a promising route towards efficient metal-free OLED emitters. There are several companies researching TADF materials, most notably Kyulux which was spun-off from the Kyushu University in Japan and Germany-based Cynora. You can read more about Kyushu`s TADF emitters here, and we also host an OLED Auditorium presentation from Kyushu`s Prof. Adachi here. Cynora estimates that its blue TADF emitters will be ready for commercial use by the end of 2017.

In March 2015 the European Commission launched a new project called Phebe that aims to develop and commercialize TADF emitters. Read our premium article discussing the latest advances in TADF emitters here.

<Source : OLED-info>