SPACE-CHARGE-LIMITED POST TRANSIT CURRENTS SPECTROSCOPY IN POLY(METHYLPHENYLSILYLENE)

Transient space-charge-limited currents (T-SCLCs) were used as a metho d for examining drift mobility, recombination and transport mechanisms for a typical poly(silylene), poly(methylphenylsilylene) (PMPSi). It was found that T-SCLCs present a unique possibility for injecting cons tant charge into a material with strong dependence of the generation e fficiency on the electric field strength. This charge is given by spac e charge limitations and is thus independent of the transport properti es of the material, The post-transit T-SCLC hole emission signals from deep traps have been measured using post-transit T-SCLCs. A density-o f-electron-states distribution for deep trapping hole states with a ta il-like exponential and a Gaussian distribution centred at 0.55 eV wer e found. (C) 1997 by John Wiley & Sons, Ltd.