TEMPERATURE-DEPENDENT UNUSUAL CHANGES IN THE FACTOR(GAMMA) REPRESENTING PHOTOCURRENT-LIGHT INTENSITY CHARACTERISTICS FOR SOME FERROCENE DERIVATIVES

The photoconductivity of some ferrocene derivatives has been studied a s a function of the intensity (I-B) Of exciting light source (mercury lamp; 125 W) at different values of fixed sample cell temperature in t he range similar to 284-317 K. The photoconductivity behavior of these materials has indicated the temperature range-dependent photoeffects. Temperature-dependent fluctuations in gamma values (in the usual rela tion for the dependence of photocurrent (I-ph) on I-B i.e. I-ph propor tional to I-B(gamma) where the exponent gamma is the characteristic of the photoconducting system) have been observed. An unusual temperatur e-dependence of photocurrent (Iph) has also been observed. The results have been compared with the results of ferrocence. Discussion regardi ng the possible origin of the observations has been presented. (C) 199 8 Published by Elsevier Science Ltd. All rights reserved.