For 8 mM TIPS-Tn, the deconvolution fits reproduce the TA data well at all wavelengths and times (Figs. S23 and S24 of the supplementary material). As with TIPS-Pn, a third component is unnecessary to fit the data at this concentration. This result is in apparent contradiction to TA data of TIPS-Tn in toluene by and Dover et al. , who resolved an excimer component from the TA data in addition to the triplet and singlet excitons. As will be discussed in more detail later, this disagreement is potentially explained by the significantly higher concentration of 300 mM used in these studies (37.5 times higher than the 8 mM solution used here). We speculate that this concentration may begin to approach the solubility limit of TIPS-Tn in toluene and result in the formation of aggregates in solution. Excimers potentially result from this aggregate formation, and are therefore undetected in more dilute solutions. The resulting concentrations of S 1 and T 1 are shown in Fig. 3(b), where the upper bound of T 1 and lower bound of S 1 concentrations correspond to the lower bound of the T 1 basis spectrum. The yield of triplets excitons at 8 ns for 8 mM TIPS-Tn is between 17 and 27%.