Their PL and Ph spectra of the doped host 10-(4-((4-(9H-carbazol-9yl)phenyl)sulfonyl)phenyl)-9,9-dimethyl-9,10-dihydroacridine (CzAcSF) ). In the doped films of HCBPSF, the corresponding proportions are 20.0%, 21.1% and 58.9%, respectively. The results of exciton dynamics demonstrate that the dendrimers exhibit smaller kRISC and kF of the dendrimers compared with TADF molecular BPSF, indicating a lower probability of emitting fluorescence and delayed fluorescence for the dendrimers. Moreover, the kISC of BPSF is significantly enhanced from 1.4×10 6 s -1 to 2.07×10 7 and 3.39×10 7 s -1 for TCBPSF and HCBPSF, respectively, resulting in a high kP of 36.0 and 11.4 s -1 , which indicates the successful enhancement of intrinsic RTP emission through the dendronized strategy. In addition, compared with other RTP films, the knr of the two dendrimers is remarkably low at 31.1 and 15.5 s -1 .