TY - JOUR
T1 - Nanosecond Time-Resolved Photoinduced Absorption of trans-Polyacetylene
AU - Yoshizawa, Masayuki
AU - Kobayashi, Takayoshi
AU - Fujimoto, Hitoshi
AU - Tanaka, Jiro
N1 - Funding Information:
ACKNOWLEDGEMENTS This work is supported by the Grant-in-Aid for the Special Distinguished Research from the Ministry of Education, Science, and Culture to T.K.(56222005) and the Toray Science and Technology Foundation and the Kurata Science Foundation to T.K., and by the Grant-in-Aid of the Ministry of Education on Special Project on Organic Thin Films to J.T.(60211014).
PY - 1987
Y1 - 1987
N2 - The photoinduced absorption and bleaching of trans-(CH)x and trans-(CD)x in the nanosecond time region were investigated for the first time by time-resolved absorption spectroscopy. 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 saturated at ΔA/A0~0.01. The decay of transient absorption at 4K was fitted to erf [(t/τ)-1/2] with τ=144±15ns for trans-(CH)x and τ=305±27 ns for trans-(CD)x. When the temperature is increased, the decay kinetics are given by the same function with shorter time constants, τ=32±6 ns for trans-(CH)x and τ=40±6 ns for trans-(CD)x at 290 K. When the trans content in cis-rich film decreased, the time constant became longer. The decay kinetics is interpreted by interchain recombination of photoinduced polaron pairs.
AB - The photoinduced absorption and bleaching of trans-(CH)x and trans-(CD)x in the nanosecond time region were investigated for the first time by time-resolved absorption spectroscopy. 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 saturated at ΔA/A0~0.01. The decay of transient absorption at 4K was fitted to erf [(t/τ)-1/2] with τ=144±15ns for trans-(CH)x and τ=305±27 ns for trans-(CD)x. When the temperature is increased, the decay kinetics are given by the same function with shorter time constants, τ=32±6 ns for trans-(CH)x and τ=40±6 ns for trans-(CD)x at 290 K. When the trans content in cis-rich film decreased, the time constant became longer. The decay kinetics is interpreted by interchain recombination of photoinduced polaron pairs.
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U2 - 10.1143/JPSJ.56.768
DO - 10.1143/JPSJ.56.768
M3 - Article
AN - SCOPUS:0011704263
VL - 56
SP - 768
EP - 780
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 2
ER -