Recent Advances of Cocrystals with Room Temperature Phosphorescence

Organic phosphorescent materials have attracted wide attention in recent years owing to their opportunities in various functional applications. Through appropriate molecular design strategies and synthetic perspectives to modulate their weak spin–orbit coupling, highly active triplet excitons, and ultrafast deactivation, the organic phosphors can be endowed with long-lived room temperature phosphorescence (RTP) characteristics. Organic cocrystals constructed by noncovalent intermolecular interactions (hydrogen and halogen bonding, π–π stacking and so on) are provoking wide interest due to their unexpected and multifaceted phosphorescence properties and their applications. In this review, research on organic cocrystals with RTP based on their interactions is described, revealing their structure–property relationships. Furthermore, current accomplishments, restrictions, and viewpoints along with some guidance for their further study are discussed.