V. STANCU, E. PENTIA, A. GOLDENBLUM, M. BUDA, G. IORDACHE, T. BOTILA
A Comparative Study of Microcrystalline and Nanocrystalline Lead Sulfide Based PbS/SiO₂/Si Heterostructures

Abstract.
The PbS micro-crystalline and nano-crystalline films were obtained using the Chemical Bath Deposition method. We investigated comparatively the structural, electrical and photoconductive properties of these films deposited on glass. PbS/SiO₂/Si heterostructures made with nanocrystalline PbS layers present interesting peculiarities. Their C–V curves show hysterezis. In a field effect arrangement it is possible to control the photoconductive short and long wavelength ratio response. The heterostructure properties were explained by taking into account the interface charged traps.

Keywords: Optoelectronics, Nano-crystalline PbS, Heterostructures.

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