Lb. Lin et al., FIELD AND TEMPERATURE DEPENDENCIES OF FREE-CARRIER PHOTOGENERATION EFFICIENCIES OF MOLECULAR GLASSES, The Journal of chemical physics, 105(19), 1996, pp. 8490-8494
The field and temperature dependencies of free carrier photogeneration
efficiencies of vapor deposited molecular glasses have been studied b
y time-of-flight photocurrent techniques, The measured photogeneration
efficiencies were analyzed by a theory of geminate recombination due
to Onsager. In spite of the wide distribution of the charge mobilities
and molecular dipole moments of the materials studied, thermalization
distances and primary quantum yields were 27-36 Angstrom and 10(-3) t
o 10(-2), respectively. The results suggest that the thermalization pr
ocess in molecular glasses is not driven by processes that determine b
ulk transport properties. (C) 1996 American Institute of Physics.