DtBuCzB has a similar structure to t-DABNA with the phenyl rings from two two phenylamines being joined to form two side carbazolyl substructures. Due to the extended conjugation by connecting the phenyl rings, DtBuCzB is relatively red-shifted in absorption and emission while compared with those of t-DABNA.
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.