Femtosecond photovoltage excitation cross-correlation on a ladder-type polymer

Nobel Lecture: Semiconducting and metallic polymers: The fourth generation of polymeric materials

“…The data imply therefore that 1/ ct Ͼ 10 12 ; i.e., electron transfer occurs on the subpicosecond time scale. The ultrafast charge-transfer process was subsequently time resolved (Kraabel et al, 1994(Kraabel et al, , 1996Lanzani et al, 2000); the data directly confirm that charge transfer occurs within a hundred femtoseconds. The photoinduced electron-transfer process serves to sensitize the photoconductivity of the semiconducting polymer (Lee, Yu, et al, 1993).…”

“…12. A broad range of studies has been carried out to fully characterize this photoinduced charge transfer, culminating with a study of the dynamics of photoinduced electron transfer from semiconducting polymers to C 60 using fs time-resolved measurements (Kraabel et al, 1994, Lanzani et al, 2000. These studies demonstrated that the charge transfer occurs within 50 fs after photoexcitation.…”

Semiconducting and Metallic Polymers: The Fourth Generation of Polymeric Materials (Nobel Lecture)

“…The data imply, therefore, that 1/ τ ct >10 12 ; that is, electron transfer occurs on the sub‐picosecond time scale. The ultrafast charge‐transfer process was subsequently time resolved;60, 61 the data directly confirm that charge transfer occurs within a few hundred femtoseconds.…”

“…A broad range of studies has been carried out to fully characterize this photoinduced charge transfer, culminating with a study of the dynamics of photoinduced electron transfer from semiconducting polymers to C 60 using femtosecond time‐resolved measurements 60, 61. These studies demonstrated that the charge transfer occurs within 50 femtoseconds after photo‐excitation.…”

Excited States in P3HT and P3HT/PCBM Blends

“…In the conventional picture, the generated exciton has to diffuse towards the interface to the electron acceptor [7,8]. At the interface the electron and the hole become spatially separated but are still Coulomb bonded (geminate pair).…”