Contribution of dipolar species to the formation of local states for charge carriers in molecular materials

• Autorzy: Sworakowski J. , Nespurek S.
• Języki publikacji: EN

Abstrakty

EN

Effect of polar impurities on transport of charge carriers in non-polar molecular materials is reviewed. The presence of such species gives rise to structural traps. Calculations of local values of the polarization energy in the vicinity of dipolar defect show that traps as deep as several tenths of eV are created. If the polar impurity molecule can act as a trap itself, at high fields one may expect a dipole analogue of the Poole-Frenkel effect, the lowering of the trap depth following, however, a different dependence on the biasing electric field: Delta Et alpha F2/3. Moreover, the dipole-charge interactions contribute to the broadening of local transport states density in disordered materials.

Słowa kluczowe

EN

molecular materials; dipole; electrical properties; traps

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 2
• Strony: 163--171
• Opis fizyczny: Bibliogr. 35 poz., wykr.

Twórcy

autor

Sworakowski J.

autor

Nespurek S.

• Institute of Physical and Theoretical Chemistry Technical University of Wrocław Wyb. Wyspiańskiego 27 50-370 Wrocław Poland,