Transport of Charge Carriers in Methylbixin Crystals: Photoconductivity Decay Measurements

Abstract
The energy distribution of gap states in methylbixin crystallites has been investigated by photoconductivity decay measurements. The results show that the shallow states decrease exponentially with characteristic temperature T c∼900 K at an applied field of 1.77×103 V/cm. T c is independent of sample temperature but depends inversely on applied field. It is suggested that field effect on T c may arise from the field effect on trapping rate.