Electrical and Photoelectric Properties of Organic Polymeric Semiconductors

Myl'nikov, V. S.

doi:10.1070/rc1968v037n01abeh001605

Cited by 10 publications

(1 citation statement)

References 12 publications

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“…PVA exhibits a strong hydrophilic and hydrogen bonding characteristic due to its hydroxyl groups, thus it is able to form cross linked hydrogels . Polyvinyl alcohol as a polymer with side groups has also been used to prepare conjugated polymers such as polyacetylene (PA) which are types of polymers with long conjugated double bonds and have spectacular properties and used in the areas of optical, electrical, magnetic and, in recent years, photo‐catalysis fields …”

Section: Introductionmentioning

confidence: 99%

The investigation of thermal decomposition pathway and products of poly(vinyl alcohol) by TG‐FTIR

Taghizadeh

Yeganeh

Rezaei

2015

J of Applied Polymer Sci

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A generalized form of a semiquantitative method has been developed based on the multilinear least-squares regression technique applied on the entire FTIR absorbance spectrum of a gaseous mixture to determine components concentration. Thermal degradation of poly(vinyl alcohol) samples with high, PVA(98), and low degree of hydrolysis, PVA(80), has been investigated by TG-FTIR simultaneous analysis performed in an inert atmosphere. Analysis of gaseous products was carried out using a routine developed in Matlab and this routine returns the product concentration with a reasonable RMS error. The correlation coefficients of the original mixture spectrum with the mixed output were obtained at some specific peak temperatures using irAnalysis software. The first process is the loss of physically adsorbed water which followed by two main processes of thermal degradation. In spite of the similarity of evolved gaseous products, two samples showed some differences in components concentrations identified in the volatile mixture. Acetaldehyde has been identified as the main volatile product in the first thermal degradation step of PVA(98) and PVA(80). The second major degradation product of PVA(80) is acetic acid due to presence of more residual acetate group while 2-butenal have been identified for PVA(98). Water was mainly produced in the first stage of thermal degradation of PVA(98) while it was identified in the first and second stages for PVA(80). This might be attributed to existence of a competition between water and residual acetate group for elimination that postpones the complete elimination of OH group to the second degradation stage.

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Section: Introductionmentioning

confidence: 99%

The investigation of thermal decomposition pathway and products of poly(vinyl alcohol) by TG‐FTIR

Taghizadeh

Yeganeh

Rezaei

2015

J of Applied Polymer Sci

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Struktur und elektrische Leitfähigkeit von polymeren organischen Halbleitern

Härtel

Koßmehl

Manecke

et al. 1973

Angew. Makromol. Chem.

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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.

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Untersuchungen über Poly(arylenvinylen)e, 9. Zusammenhang zwischen der chemischen Struktur und der photoelektrischen Empfindlichkeit von Polyxylylidenen

Hörhold

Opfermann

1975

Makromol. Chem.

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ZUSAMMENFASSUNG:An einer Reihe verschieden substituierter und isomerer Poly(arylenviny1en)e (Polyxylylidene) wurde gefunden, dal3 bei den undotierten Polymeren zwischen der optischen Anregungsenergie E,,, und der photoelektrischen Empfindlichkeit Jph der Zusammenhang (1) besteht. J P h = A( T)exp-(0,34 E,,,/kT); T=Const.(1) Diese Beziehung wird aufder Grundlage einer photochemischen Ionisation der Makromolekiile diskutiert. SUMMARY:In a series of differently substituted and isomeric poly(aryleneviny1ene)s (polyxylylidenes) it was found, that with the undoped polymers there is the relation (!) between the optical excitation energy E,,, and the photoelectricdl sensitivity J P h . J P h = A(T)exp-(0,34 E,,,/kT); T=const.

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Electrical and Photoelectric Properties of Organic Polymeric Semiconductors

Cited by 10 publications

References 12 publications

The investigation of thermal decomposition pathway and products of poly(vinyl alcohol) by TG‐FTIR

The investigation of thermal decomposition pathway and products of poly(vinyl alcohol) by TG‐FTIR

Struktur und elektrische Leitfähigkeit von polymeren organischen Halbleitern

Untersuchungen über Poly(arylenvinylen)e, 9. Zusammenhang zwischen der chemischen Struktur und der photoelektrischen Empfindlichkeit von Polyxylylidenen

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