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Doping-Induced Absorption in Polyphenylacetylene Films
1Aksimentyeva O.I., 1Konopelnyk O.I., 2Stakhira
P.Y., 3Tsizh B.R.
1Ivan Franko Lviv National University, 8 Kyrylo
and Mefodiy St., 79005 Lviv, Ukraine
2National University “Lviv Polytechnic”, St
Yuriy Sq., 79016 Lviv, Ukraine
3Bydgoszcz Academy of Kazimer Wielki Chodkiewicza
85-064, Poland
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The processes of donor and acceptor doping of polyphenylacetylene (PPA)
films electrochemically obtained on transparent electrodes have been studied.
It has been shown that donor n-doping of the PPA by lithium leads to formation
of free charge carriers in the conjugated polymer chain, which cause a
doping-induced absorption in the long-wave region. Under acceptor p-doping
of the PPA films by iodine, the doping-induced optical absorption is observed
in the short-wave region. It results from the complexes of charge transfer
between the PPA and iodine.
Key words: polyphenylacetylene, electrochemical preparation, optical
spectra, donor and acceptor doping, absorption bands.
PACS: 61.43 Dq, 68.60.Dv, 71.20.Rv
doi 10.3116/16091833/6/3/114/2005 |
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