Details

Autor(en) / Beteiligte

• Eaton, Samuel W
• Shoer, Leah E
• Karlen, Steven D
• Dyar, Scott M
• Margulies, Eric A
• Veldkamp, Brad S
• Ramanan, Charusheela
• Hartzler, Daniel A
• Savikhin, Sergei
• Marks, Tobin J
• Wasielewski, Michael R

Titel

Singlet Exciton Fission in Polycrystalline Thin Films of a Slip-Stacked Perylenediimide

Ist Teil von

• Journal of the American Chemical Society, 2013-10, Vol.135 (39), p.14701-14712

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The crystal structure of N,N-bis(n-octyl)-2,5,8,11-tetraphenylperylene-3,4:9,10-bis(dicarboximide), 1, obtained by X-ray diffraction reveals that 1 has a nearly planar perylene core and π–π stacks at a 3.5 Å interplanar distance in well-separated slip-stacked columns. Theory predicts that slip-stacked, π–π-stacked structures should enhance interchromophore electronic coupling and thus favor singlet exciton fission. Photoexcitation of vapor-deposited polycrystalline 188 nm thick films of 1 results in a 140 ± 20% yield of triplet excitons (3* 1) in τSF = 180 ± 10 ps. These results illustrate a design strategy for producing perylenediimide and related rylene derivatives that have the optimized interchromophore electronic interactions which promote high-yield singlet exciton fission for potentially enhancing organic solar cell performance and charge separation in systems for artificial photosynthesis.