Ultrafast Charge Carrier Dynamics in Diketopyrrolopyrrole-Linked Tetrabenzoporphyrin Films Studied by Time-Resolved Terahertz Spectroscopy

Kaoru Ohta,Keisuke Tominaga,Yuichi Hiramatsu,Hiroko Yamada,Kohtaro Takahashi,Mitsuharu Suzuki

doi:10.1109/irmmw-thz.2018.8510180

Ultrafast Charge Carrier Dynamics in Diketopyrrolopyrrole-Linked Tetrabenzoporphyrin Films Studied by Time-Resolved Terahertz Spectroscopy

Kaoru Ohta, Keisuke Tominaga + Show 4 more

https://doi.org/10.1109/irmmw-thz.2018.8510180

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Publication Date: Sep 1, 2018

Citations: 4

Affiliation: Kobe University, Nara Institute of Science and Technology

#Time-Resolved Terahertz Spectroscopy #BM Bulk Heterojunction + Show 8 more

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Abstract

We use time-resolved terahertz (THz) spectroscopy to study the charge carrier dynamics of diketopyrrolopyrrole-linked tetrabenzoporphyrin (C4-DPP-BP) thin films and C4-DPP-BP:PC 61 BM bulk heterojunction (BHJ) thin films. For BHJ thin films, the results show that the amplitude of the picosecond decaying components depends on the excitation fluence. We consider that the annihilation of charge pairs is responsible for the fast decaying components in the BHJ thin film at higher excitation fluence.

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