Some thermal and electronic transport properties of mineral marmatite (ZnS: Fe)

The thermal diffusivity and some electronic transport properties of semicon ducting ore mineral marmatite (ZnS:Fe) from the Trepca mine (Yugoslavia) we re determined using a photoacoustic method with a transmission detection co nfiguration. Thermal diffusivity, coefficient of carrier diffusion, the exc ess carrier lifetime, and the rear and front surface recombination Velociti es were calculated by fitting experimental spectra and theoretical photoaco ustic amplitude and phase signals. The results obtained by optical transmis sion and reflectivity measurements were used to compare the determined valu es of the optical absorption coefficient using photoacoustic (PA) and optic al methods. The mobility of the photogenerated free carrier holes of single crystal marmatite was calculated, for the first time, to be mu(p) similar to 428 cm(2)/Vs. (C) 2000 Elsevier Science Ltd.