Table 3. Six-component global target analysis of transient absorption of amorphous pentacene derivative nanoparticles (all time constants in units of ps) a , b .
Compound | Dimer pair sites | |||||
H-aggregate | Monomer-like | |||||
τ S1S0(H) | τ TT* | τ TT(S) | τ S1S0(m) | τ TT(L) | τ T···T | |
TES-Pn | ≤0.1 | 13 | 150 | 0.4 | 640 | ≫8000 |
TIPS-Pn | 0.2 | 15 | 200 | 1.1 | 960 | ≫8000 |
TSBS-Pn | ≤0.1 | 10 | 310 | 1.7 | 2300 | ≫8000 |
aAs described in detail in the main text, the components SAS-1, SAS-3, and SAS-4 are assigned to the H-aggregate sub-populations S1S0 (H), TT*, and TTS, respectively, and the components SAS-2, SAS-5, and SAS-6 are assigned to the monomer-like sub-populations S1S0 (m), TTL, and T···T, respectively.
bNanosecond transient absorption measurements indicate that spatially separated triplets exhibit a lifetime of ca. 10 μs (Section S20), i.e., which is essentially equivalent to that of isolated-chromophore triplet excitations (Section S10).