, where |VSOC| 2 is the spin-orbit coupling matrix element between T1 and S1 states, and ΔEST is the energy gap between them. A common strategy to enhance kRISC and promote TADF is to minimize the ΔEST, which can be achieved by reducing the overlap integral between the HOMO and LUMO. Previous work on CPPs has demonstrated that CPP derivatives can exhibit CT character in their excited states and moderate HOMO/LUMO separation by suitable decoration of the CPP core; however, none of these CPP derivatives have been reported to show TADF. To act as potential high-performance emitters for OLEDs, it would be of strong interest to develop TADF CPP derivatives. In this work, we employed DFT and TD-DFT calculations using the Tamm- We demonstrate the first CPP-based solution-processed organic light-emitting diode (OLED), which shows sky-blue emission with a maximum external quantum efficiency, EQEmax, of 1.0%.