Therefore, up to this stage, we propose a design strategy aimed at achieving efficient intrinsic RTP molecules through dendronization. Our approach involves utilizing a donor-acceptor structure as an emitting center and dendrons as triplet regulators to facilitate conversion from thermally activated delayed fluorescence (TADF) to intrinsic RTP, as illustrated in Fig. . The introduction of dendrons not only serves the dual purpose of maintaining a very small ΔEST and generating a higher population of triplets, thereby facilitating a multichannel ISC process but also effectively modulates the transition between different mixtures of charge transfer (CT) and localized (LE) states, resulting in an increased spin-orbit coupling (SOC) and enhanced ISC process and triplet radiation transition. Notably, the intrinsic RTP emission is observed in airequilibrated solutions of the dendrimers, exhibiting phosphorescence lifetimes in the millisecond range. Moreover, the phosphorescence lifetimes are further prolonged with increasing aggregation degrees, showcasing aggregation-induced phosphorescence enhancement (AIPE) behaviors. Additionally, the incorporation of these dendrimers into rigid polymer doped films leads to the manifestation of anti-Kasha dual phosphorescence emissions through triplet up-conversion. Remarkably, amorphous films doped with the dendrimers as guests exhibit a high photoluminescence quantum yield (PLQY) of 98%, while the solution-processed organic light-emitting diodes (OLEDs) achieve an impressive external quantum efficiency (EQE) of 25.1%. These remarkable results firstly validate the effectiveness of dendrons regulated triplet design strategy in overcoming the limitations of previous RTP emitters. Moreover, the design rules established in this study can be extended to other chromophores, which open novel and inspiring possibilities for fine-tuning essential photophysical properties for applications.