CzBN is closely related to DABNA-1 in structure. The only difference being is that the two phenylamines on each side of the DABNA-1 structure are joined to form two side carbazolyl substructures. As a result, CzBN is conjugated with a triphenyl boron core and it is believed that the formed carbazolyl groups extend the π-conjugation and increase the intramolecular charge transfer localization area for a greater multiresonance effect.

CzBN can also be considered as a derivate of 1,3-bis(N-carbazolyl)benzene (mCP), one of the most widely used host materials in OLED devices.

Due to the conjugation, CzBN is relatively red shifted in absorption and emission when compared to DABNA-1. CzBN has an absorption band at around 470 nm and narrow emission band at 479 nm with FWHM of 30 nm in dilute dichloromethane solution and PLQYs of 87%.

A solution processed sky-blue multiresonance TADF OLED device, based on 5 wt.% CzBN in a CzAcSF host, exhibited a maximum current efficiency of 24.3 cd/A, a power efficiency of 15.9 lm/W, and an external quantum efficiency of 14.7%. This is a device efficiency improvement when compared to the vacuum-deposited OLEDs based on DABNA-1.

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* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.