Poole-Frenkel effect in amorphous poly(p-phenylene sulfide)

Campos, M.; Cavalcante, Edinilton Morais; Kalinowski, J.

doi:10.1002/(sici)1099-0488(199603)34:4<623::aid-polb2>3.0.co;2-r

Cited by 12 publications

(6 citation statements)

References 28 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ionic charge transportation will take place through hopping from one trap site to another. [16] Charge transport through a hopping mechanism and the presence of neutral hole traps in PPS have also been shown by Campoes et al [17] The fact that its peak current (I m ) varies linearly with E p 1/2 (inset Figure 1 b) reveals that in more intrinsic or extrinsic space the charge mechanism should be jointly operative resulting in an overall non-uniform polarization. [18] The space charge nature of the a-peak is also supported by the electret aging study where this peak is observed to decrease continuously with storage time (Figure 6 b).…”

Section: Discussionmentioning

confidence: 65%

Study of Dielectric Relaxation Processes in Poly(p-phenylene sulfide) Using a Thermally Stimulated Discharge Current Technique

Quamara¹,

Singh

2001

Macromol. Chem. Phys.

View full text Add to dashboard Cite

The various dielectric relaxations in poly(p‐phenylene sulfide) have been investigated using a thermally stimulated discharge current (TSDC) technique. The TSD current spectra in the temperature range 30 to 250°C was analyzed as a function of poling temperature (100–250°C), poling field (5–18 kV/cm), poling time (1–4 h), specimen thickness (0.8–1.6 mm), heating rate (1–4°C/min.) and storage time (2–720 h). From the variation of the properties of peaks appearing in the TSDC spectra, it is concluded that the peak appearing at around 110°C (β‐relaxation) is a dipolar transition due to C–S linkage. Samples poled at higher (Tp > Tg) show a peak at around 170°C (β ′‐relaxation), which has been associated with the formation of cross‐linked ether linkages. The β ′‐relaxation gives all the character of dipolar polarization. The peak at around 210°C (α‐peak) has been ascribed to a space charge transition. A rigid amorphous phase (RAP) and unsaturated phenylene groups provide the deep charge trapping centers. The activation energy obtained from the Bucci plot method confirms the respective nature of these peaks. The observed dependence of peak temperature on poling temperature and poling time indicates the presence of continuous distributed relaxation.

show abstract

Section: Discussionmentioning

confidence: 65%

Study of Dielectric Relaxation Processes in Poly(p-phenylene sulfide) Using a Thermally Stimulated Discharge Current Technique

Quamara¹,

Singh

2001

Macromol. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…At higher electric fields, above 1.5 x 10 4 V/cm, the electric field affects the rate of carrier generation or injection, and the bulk limited charge transport undergoes a transition to the electrode limited conduction, which can be expressed as an RS effect. This mechanism is different than typically observed in organic solids, where at low electric fields the transport is controlled by the distribution of interfacial traps or by the space-charge-limited (SCL) transport [10,11].…”

Section: Resultsmentioning

confidence: 67%

Non-linear charge transport in polythiophene under high AC field

et al. 2005

View full text Add to dashboard Cite

Complex impedance and conductivity were measured for regioregular poly(3-hexylthiophene) (P3HT) at alternating current (AC) voltages using a waveform technique. The waveforms were Fourier transformed from time domain to frequency domain and analyzed at fundamental and higher order harmonic frequencies. It was found that the impedance of the semi-conducting P3HT decreases with increasing electric field strength. The non-linear charge transport is dominated by a third harmonic response that originates from extended polarizability of π-type electronic states. The third order non-linear conductivity can be used to quantify the effect of an electric field on the conduction mechanism and to correlate the intrinsic charge carriers mobility with molecular structure.

show abstract

“…Some years ago, it was proposed that the nonlinearity of the I–V characteristics of the polymer/metal junction could be due to space‐charge limited conduction (SCLC),29 Poole‐Frenkel emission30 or thermionic emission.…”

Section: Resultsmentioning

confidence: 99%

Electrical response of polypyrrole films doped with dodecylbenzene sulfonic acid to acetone vapor

Campos

2011

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Measurements of current-voltage curves at room temperature, in nitrogen and nitrogen-acetone atmospheres have clearly demonstrated the rectifying behavior of the Al/PPy-DBSA/Au structure. For this structure, the values of 0.82 eV and 2.31, for the barrier height and ideality factor, respectively, have been obtained in nitrogen atmosphere, while at concentration of 120 ppm of acetone, the corresponding values were 0.74 eV and 2.07. The barrier height value obtained from I-V characteristic is lower than the barrier height value obtained from C-V measurements. The discrepancy can be due to the existence of an interfacial oxide layer between the semiconductor and Schottky contact metal. The density distribution curves of the interface states vary in the range (0.55-E V ) to (0.84-E V ) for pure nitrogen, and (0.45-E V ) to (0.60-E V ) in atmosphere with acetone. The interface state density has an exponential rise with bias from the midgap towards the top of the valence band of the PPy-DBSA.

show abstract

Poole-Frenkel effect in amorphous poly(p-phenylene sulfide)

Cited by 12 publications

References 28 publications

Study of Dielectric Relaxation Processes in Poly(p-phenylene sulfide) Using a Thermally Stimulated Discharge Current Technique

Study of Dielectric Relaxation Processes in Poly(p-phenylene sulfide) Using a Thermally Stimulated Discharge Current Technique

Non-linear charge transport in polythiophene under high AC field

Electrical response of polypyrrole films doped with dodecylbenzene sulfonic acid to acetone vapor

Contact Info

Product

Resources

About