US-based OLED material developer Molecular Glasses received a $225,000 SBIR Phase I grant from the National Science Foundation to develop non-crystallizable charge transporting organic materials as OLED functional layers and thermally activated delayed fluorescence (TADF) emitter-layer hosts.
The NSF explains currently used OLED host molecules tend to crystallize and are poor solvents for the emitting molecules leading to decreased light emission efficiency and shortened device lifetime. Molecular Glasses' innovation uses isomeric mixtures of designed molecules that are amorphous and non-crystallizable in all three layers.
These molecules are chemically designed to meet all the required photophysical and electrical characteristics necessary for superior OLED performance. Preliminary device fabrication and testing has confirmed that these new materials dramatically improve both emission efficiency and device lifetime with the standard emitter molecules. This project will couple the new non-crystallizable technology with TADF to design and fabricate OLED devices with both high efficiency and long life to meet commercialization requirements.