Nanosecond time-resolved photoinduced absorption of trans-polyacetylene

T. Kobayashi, M. Yoshizawa, H. Fujimoto, J. Tanaka

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5 Citations (Scopus)


The photoinduced absorption and bleaching of trans-polyacetylene were investigated in nanosecond time regime for the first time. The transient absorption near the band gap and the bleaching of the interband transition were observed for both trans-(CH)x and trans-(CD)x. The absorption near the band gap saturates at ΔA/AO ∼ 0.01. The decay curves of transient absorbance change can be fitted to erf[(t/τ)- 1 2]. The time constants are 144±15 ns ((CH)x) and 305±27 ns ((CD)x) at 4 K and 32±6 ns ((CH)x) and 40±6 ns ((CD)x) at 290 K. When the trans content in cis-rich film decreases, the time constant becomes longer. The decay kinetics was interpreted by the interchain recombination of photoexcited polaron pairs.

Original languageEnglish
Pages (from-to)367-372
Number of pages6
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - 1987 Jan


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