Poly(silyens)s: Charge Carrier Photogeneration and Transport: S. Nešpůrek, A. Eckhardt Polym. Adv. Technol.12, 427–440 (2001)

Abstract

AbstractThe original article to which this Erratum refers was published in Polym. Adv. Technol. 12, 427–440 (2001)In the following paragraph, ‘µ’ was inserted instead of ‘γ’.The paragraph should have read: Xerographic DischargeThe electric field (F) dependences of photogeneration efficiency as measured by the xerographic discharge method are shown in Figure 4 for PMPSi and PBMSi. The electric field and temperature (T) dependences of the photogeneration efficiency can be described using Onsager theory of geminate recombination (full lines). This theory can be used to describe one step in the photogeneration process, the thermal dissociation of ion‐pairs formed by light into free charge carriers in the external electric field. Under the assumption that the distribution of bound pairs is spherically symmetrical, the overall photogeneration efficiency ν is expressed as $\eta\,(r,F,T)=\eta_0\,\,{\textstyle\int}\,4\pi r^2f(r,F,T)g(r)dr$ where ϵ0 is the voltage and temperature independent primary quantum yield (fraction of the ion‐pair generated per photon), g(r) is the spatial distribution of the pairs, and r is the pair separation distance. Function f(r,F,T) represents the Onsager dissociation probability [9] of the ion‐pair. The best theoretical fits of the experimental data given in Figure 4 were found using the Onsager theory with the Gaussian distribution of radii [17] $g(r)=(\pi^{-3/2}$­$\gamma^{-3})$ exp (−r2/γ2) using parameters: γ = 1.3 nm, η0 = 0.45 and γ = 1.6 nm, η0 = 0.85 for PMPSi and PBMSi, respectively. According to Eq. 2 the photogeneration quantum efficiency η is also temperature dependent. The activation energy was determined as Eη = 0.05 eV for PMPSi (inset in Figure 4) and 0.04 eV for PBMSi. The temperature dependence of the photogeneration efficiency is also in good agreement with the Onsager dissociation theory (full line in inset of Figure 4).