Where a larger SOC (S1, Tn) by dendronization can increase the first term of equation from Tn→T1. Consequently, a high 𝜇 𝑇 1 →𝑆 0 can be achieved by borrowing more on the intensity of spin-allowed Tn→T1 transitions. Therefore, increasing triplet density by dendronization presents a viable approach to augment 𝜇 𝑇 1 →𝑆 0 . As a result, the 𝜇 𝑇 1 →𝑆 0 increase from 1.09×10 -6 to 2.90×10 -5 and 3.06×10 -5 D after dendronization. This significant increase indicates a considerably stronger phosphorescence emission can be anticipated in the dendrimer system.