Geminate electron-ion pairs generated by ionising radiation in nonpolar hydrocarbon glasses: recombination, polarisation, and separation

Hopping reactions of charged particles

“…16,17 Besides, a pronounced effect of an external electric field on reaction constants was obtained. [17][18][19][20] Some attempts were made 20,21 to understand the results within diffusional theory, well elaborated in contact approximation. [22][23][24] However, diffusional theory is incompatible with the huge random walk step length ͑the ''mean free path'' Ϸ60Ϫ200 Å measured in Refs.…”

Investigation of geminate recombination of radical ion pairs generated by dissociation of exciplexes in moderately polar solvents using the photoconductivity technique

“…3 and 4, the decay of the geminate ion current is not described by a simple function. At t > 0:001 Â R 2 c =D, the value of J gip /J 0 is less than W. This is caused, as noted previously [24,50,51], by electric polarization of the spatial distribution of geminate ions in the electric field resulting in a non-monotonic time dependence of the average electric field acting on geminate ions (see Appendix B). Figs.…”

“…4, under certain conditions the current can be even negative at certain times. (Negative currents have been obtained by many authors [50][51][52].) However, at 4pDR c /r < 20, the value of J gip /J 0 decreases monotonically with increasing time at t > 0:1 Â R 2 c =D approaching from above the q probability.…”

“…Numerical methods for solving the Smoluchowski equation with the joint Coulomb and external fields by a differential-difference approximation have been developed [50][51][52][53]. Some peculiarities of kinetics of the J gip current are discussed in Appendix B.…”

Reversible holographic recording media based on polymeric composites and their use in energy-saving technologies

“…The external electric field not only decreases the potential barrier of carrier output from the photogeneration center, but also promotes redistribution of electron density within the molecules in the direction of this barrier and induces electric charges of opposite signs in the molecule to which the electronic transition occur [5,8]. The singlet spin state of a pair of charge carriers recombining in the recombination center is most often realized for the recombination centers, the ground state of which is singlet [8,12,18,19]. It is typical for most organic dyes [14,20,21].…”