Electrical, Optical, Thermoelectric Power, and Dielectrical Properties of Organic Semiconductor Poly(1,12-bis(carbazolyl) Dodecane) Film
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- 作者：F. Yakuphanoglu ; Houting Liu ; Jingkun Xu
- 刊名：Journal of Physical Chemistry B
- 出版年：2007
- 出版时间：July 5, 2007
- 年：2007
- 卷：111
- 期：26
- 页码：7535 - 7540
- 全文大小：179K
- 年卷期：v.111,no.26(July 5, 2007)
- ISSN：1520-5207
文摘
Electrical conductivity, optical, thermoelectric, and dielectrical properties of the poly(1,12-bis(carbazolyl)dodecane) film have been investigated. The activation energy for electrical conductivity and room-temperatureelectrical conductivity (at 25 
f">C) values were found to be 0.25 eV and 2.65 × 10-6 S/cm, respectively. Thethermoelectric power results suggest that the conductivity is due to large polarons (i.e., the carriers in polymermove by hopping in the localized states at band gap edges). Electrical conductivity and thermoelectric powerresults confirm that the polymer is a p-type organic semiconductor. Optical absorption results suggest thatthe direct allowed transitions are dominant in the fundamental absorption edge in the polymer with opticalband gap value of 2.72 eV. The refractive index dispersion of the polymer obeys the single oscillator modelwith oscillator energy (Eo = 3.06 eV) and dispersion energy (Ed = 17.82 eV) values. Alternating currentconductivity results suggest that the hopping conductivity is dominant in the polymer. The dielectrical propertiesexhibit a non-Debye relaxation.
f">C) values were found to be 0.25 eV and 2.65 × 10-6 S/cm, respectively. Thethermoelectric power results suggest that the conductivity is due to large polarons (i.e., the carriers in polymermove by hopping in the localized states at band gap edges). Electrical conductivity and thermoelectric powerresults confirm that the polymer is a p-type organic semiconductor. Optical absorption results suggest thatthe direct allowed transitions are dominant in the fundamental absorption edge in the polymer with opticalband gap value of 2.72 eV. The refractive index dispersion of the polymer obeys the single oscillator modelwith oscillator energy (Eo = 3.06 eV) and dispersion energy (Ed = 17.82 eV) values. Alternating currentconductivity results suggest that the hopping conductivity is dominant in the polymer. The dielectrical propertiesexhibit a non-Debye relaxation.