Acceleration of singlet fission in an Aza-derivative of TIPS-pentacene

• Verfasst von: Herz, Julia [VerfasserIn]
• Verfasst von: Buckup, Tiago [VerfasserIn]
• Verfasst von: Paulus, Fabian [VerfasserIn]
• Verfasst von: Bunz, Uwe H. F. [VerfasserIn]
• Verfasst von: Motzkus, Marcus [VerfasserIn]
• Titel: Acceleration of singlet fission in an Aza-derivative of TIPS-pentacene
• Verf.angabe: Julia Herz, Tiago Buckup, Fabian Paulus, Jens Engelhart, Uwe H.F. Bunz, and Marcus Motzkus
• E-Jahr: 2014
• Jahr: 30 June 2014
• Umfang: 6 S.
• Fussnoten: Gesehen am 04.08.2020
• Titel Quelle: Enthalten in: The journal of physical chemistry letters
• Ort Quelle: Washington, DC : ACS, 2010
• Jahr Quelle: 2014
• Band/Heft Quelle: 5(2014), 14, Seite 2425-2430
• ISSN Quelle: 1948-7185
• DOI: doi:10.1021/jz501102r
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1726137562

Abstract

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.