this work shows that questioning conventional wisdom can lead to technological breakthroughs
A new heptazine analog could power organic light-emitting diodes by defying Hund’s rule
They found that a molecule called HzTFEX2 broke Hund’s rule with inverted singlet and triplet states that allow the molecule to emit blue light as predicted. When they built a prototype OLED device using HzTFEX2, the researchers calculated 85% quantum efficiency versus the maximum 25% efficiency of traditional OLEDs constrained by Hund’s rule, Aizawa says.
https://cen.acs.org/materials/photonics/organic-molecule-shines-bright-breaking/100/i33?utm_source=Newsletter&utm_medium=Newsletter&utm_campaign=CEN