Table 1 Summary of optical properties and electronic energy levels, exciton lifetime τ, annihilation rate constant γ, annihilation radius R, exciton diffusion coefficient D and exciton diffusion length LD of YDT, DY, TY QY and PY-IT
From: Precise synthesis and photovoltaic properties of giant molecule acceptors
Acceptor | λmax sol (nm) | λmax film (nm) | εmax film (105 cm−1) | HOMO (eV) | LUMO (eV) | τ (ns) | γ (10−8cm3s−1) | R (nm) | D (10−3cm2s−1) | LD (nm) |
|---|---|---|---|---|---|---|---|---|---|---|
YDT | 720 | 785 | 1.02 | −5.66 | −3.73 | 1.05 ± 0.08 | 0.88 ± 0.01 | 2.36 | 1.48 ± 0.02 | 12.5 ± 0.5 |
DY | 735 | 781 | 1.21 | −5.66 | −3.74 | 1.71 ± 0.09 | 1.1 ± 0.01 | 2.05 | 2.14 ± 0.02 | 19.1 ± 0.6 |
TY | 746 | 793 | 1.42 | −5.64 | −3.75 | 2.70 ± 0.15 | 1.5 ± 0.03 | 2.08 | 2.87 ± 0.06 | 27.8 ± 1.1 |
QY | 762 | 795 | 1.36 | −5.64 | −3.76 | 2.71 ± 0.10 | 1.7 ± 0.03 | 1.69 | 4.00 ± 0.07 | 32.9 ± 0.9 |
PY-IT | 796 | 808 | 1.44 | −5.63 | −3.77 | 2.23 ± 0.08 | 2.1 ± 0.05 | 1.62 | 5.40 ± 0.12 | 34.5 ± 1.2 |
