CuInS2, films were synthesized by sulphurization of In/Cu stacked elemental
layers (SEL) deposited onto glass and Mo-coated glass substrates by graphi
te box annealing at temperatures of 620-880 K, The films thus synthesized w
ere characterized by measuring electrical, optical, microstructural and pho
toluminescence properties, The microstructure and hence the physical proper
ties of the films depended critically on the amount of sulphur incorporatio
n. Nature of charge carriers depended on both Cu/In and S/(Cu + In) ratio a
nd the carrier concentration varied between 10(14) and 10(18) cm(-3). Grain
boundary scattering effects were critically studied by measuring the elect
rical conductivity and Hall mobility simultaneously on the same sample. The
shape of the grains depended critically on the sulphur content. The PL spe
ctra were dominated by the excitonic peak similar to 788 nm followed by ano
ther peak at similar to 892 nm which may be ascribed to the DA transition.
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