Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 5, Issue 14, Pages 2425-2430Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz501102r
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- BW-Landesgraduiertenforderung
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The influence of the carbon to nitrogen substitution on the photoinduced dynamics of TIPS-pentacene was investigated by ultrafast transient absorption measurements on spin-coated thin films in the visible and in the near-infrared spectral region. A global target analysis was performed to provide a detailed picture of the excited-state dynamics. We found that the chemical modification has a high impact on the triplet formation and leads to shorter dynamics; hence it speeds up the singlet fission process. A faster relaxation from the singlet into the triplet manifold implies a higher efficiency because other relaxation channels are avoided. The air-stable aza-derivatives have the potential to exceed the energy conversion efficiency of TIPS-pentacene.
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