FIELD AND TEMPERATURE DEPENDENCIES OF FREE-CARRIER PHOTOGENERATION EFFICIENCIES OF MOLECULAR GLASSES

Citation
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
Citations number
31
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
ISSN journal
00219606
Volume
105
Issue
19
Year of publication
1996
Pages
8490 - 8494
Database
ISI
SICI code
0021-9606(1996)105:19<8490:FATDOF>2.0.ZU;2-U
Abstract
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.