Influence of FeCl3 dopant on the electrical conductivity of pyrolysed aromatic polymers

Simitzis, J; Zoumpoulakis, L

dc.contributor.author	Simitzis, J	en
dc.contributor.author	Zoumpoulakis, L	en
dc.date.accessioned	2014-03-01T01:12:01Z
dc.date.available	2014-03-01T01:12:01Z
dc.date.issued	1996	en
dc.identifier.issn	0022-2461	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11917
dc.subject	Charge Transfer	en
dc.subject	Electric Conductivity	en
dc.subject	Organic Semiconductors	en
dc.subject	X Rays	en
dc.subject	Weight Loss	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Charge transfer	en
dc.subject.other	Composition effects	en
dc.subject.other	Electric conductivity of solids	en
dc.subject.other	Heating	en
dc.subject.other	Intercalation compounds	en
dc.subject.other	Iron compounds	en
dc.subject.other	Pyrolysis	en
dc.subject.other	Semiconducting polymers	en
dc.subject.other	Semiconductor doping	en
dc.subject.other	Temperature	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Iron chloride	en
dc.subject.other	Lignin Kraft	en
dc.subject.other	Pyrolysis temperature	en
dc.subject.other	X ray diffractogram	en
dc.subject.other	Aromatic polymers	en
dc.title	Influence of FeCl3 dopant on the electrical conductivity of pyrolysed aromatic polymers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF00357872	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF00357872	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	FeCl3 is used as a dopant of organic semiconductors which have polyconjugated structures (e.g. polyacetylene, polyphenylene), as well as for the intercalation of graphite. Semiconducting polymers can be also synthesized by the pyrolytic conversion of organic polymers. The influence of FeCl3 as a dopant for pyrolysed aromatic polymers at different pyrolysis temperatures up to 1000 degrees C on their electrical conductivity, sigma, has been investigated. In the materials poly-p-phenylene, o, m, p-polyphenylenes, novolac resin cured with hexamethylenetetramine, biomass of olive stones, lignin Kraft isolated from this biomass, three regions can be distinguished. The electrical conductivity is low up to 500 degrees C, between 500 and 700 degrees C it increases greatly, and above 700 degrees C it increases at a lower rate. For o, m, p-polyphenylenes, these regions (especially the first and the second) cannot be distinguished. Similar curves are generally obtained after doping of the pyrolysed materials. The ratio of the electrical conductivity of doped, sigma to undoped, sigma(0), pyrolysed materials increases mainly between 500 and 700 degrees C with the exception of o, m, p-polyphenylenes, where the electrical conductivity decreases at all of the pyrolysis temperatures. The electrical conductivity of the materials is more strongly influenced by heating than by doping. The results are interpreted based on the structure of the materials using X-ray diffractograms, weight losses during the pyrolysis, and taking into consideration the reactions occurring during pyrolysis. FeCl3 is an effective dopant for organic semiconductors affected by charge transfer, but a less effective dopant for pyrolysed polymers and which do not lead to intercalation because of the low order and extension of the carbon layer formed in comparison to graphite.	en
heal.publisher	CHAPMAN HALL LTD	en
heal.journalName	Journal of Materials Science	en
dc.identifier.doi	10.1007/BF00357872	en
dc.identifier.isi	ISI:A1996UB53400029	en
dc.identifier.volume	31	en
dc.identifier.issue	6	en
dc.identifier.spage	1615	en
dc.identifier.epage	1620	en