Struktur und elektrische Leitfähigkeit von polymeren organischen Halbleitern

Abstract

I n der folgenden zusammenfassenden Darstellung wird uber niedermolekulare und polymere organische Halbleiter berichtet, die in letzter Zeit in unserem Institut synthetisiert wurden.Bei den Polyenarylenen bzw. -heteroarylenen werden spezifische elektrische Leitfiihigkeiten bis zu 82980K = 9,0 . 10-552-1 . cm--l bei einer thermischen Aktivie- SUMMARY:I n this review article we want to give information about low molecular and polymer organic semiconductors, which were recently synthesized in our institute.Specific electric conductivities up to (T2980K = 9.0 . 10-552-1 . cm-1 and thermic activation energies of E = 0.30 eV of polyenearylenes, respectively -heteroarylenes were measured.Polyazomethines have a maximum (T2980K = 3.3 . 10-952-1 . cm-1 and E = 0.35 eV. Polymers with indophenine units have conductivities up to (T2980K = 1.1 . 10-452-1 * cm-l and E = 0.39 eV. A maximum of (T2980K = 5.0 . 10-252-1 . cm-1 and E = 0.05 eV was found for bis-(l.2-dicyanoethylenedithiolo)-metal salts.* Vortrag anlaBlich der Tagung der GDCh-Fachgruppe ,,Makromolekulare Chemie" L2-l . cm-l and E 2 0.5 eV were obtained by the polymerization of succinonitrile.All the investigated substances show an electronic conductivity. The existence of an ionic conductivity could, in all cases, be excluded by using direct current measurements over a long period of time.

Hydroxy-functionalized liquid crystalline polyazomethines II. Study of new central cores and synthesis of coordination polymers

“…The possibility of introducing metals at speci® c points (methoxy groups) were introduced ( polymers 9 and 10 ), as well as a¯exible ethylenic chain ( polymer 6 ). The in the polymeric chains leads to polymers with interesting properties [ 8 ] such as conductivity [ 9], catalytic in¯uence of diamines, which alter the coaxiality of the polymeric chains ( polymer 8 ) or introduce kinks ( polyproperties [10 ], magnetic [11 ] or non-linear optical properties [12 ]. The metal complexation of hydroxymers 7, 11 and 12 ), on the thermal transition will also be analysed.…”

Preparation and characterization of Cu (II) supported on poly(8‐hydroxyquinoline‐p‐styrene sulphonate) and its application as catalyst for the synthesis of hexahydroquinolines

“…Chelation reaction of polymers with metal ions provides useful properties depending on the structure of metal‐chelate, including high temperature and flame resistant, low leaching the metal ion to the reaction mixture, and recyclability of the metal loaded polymers . Such polymers can be used in different fields of science and technology such as electronic for developing nonflammable fibers and semiconductors, medical and agricultural purposes, and especially catalysis . Copper‐mediated syntheses are of great interest among many kinds of transition metal catalyzed reactions, due to effectiveness as catalysts, environmental friendly nature and the low toxicity of Cu …”

Effects of cobalt and potassium doping on thermal stability and electrical properties of radiation grafted acrylic acid onto poly(tetrafluoroethylene ethylene) copolymer films

“…The presence of carboxylic groups in the grafted layer allows us to obtain metal acrylate by alkali treatment6, 7 or metal acrylate complexes by treatment with some salts of transition metals 10–13. The conductivity of the polymer–metal complexes was studied 14–16. Electrical properties constitute one of the most convenient and sensitive methods for studying the polymer structure 17, 18…”