Charge diffusion noise in monocrystalline PbS nanoparticle films

Otten, F.; Kish, L. B.; Kish, L.B.; Granqvist, C.-G.; Vandamme, L. K. J.; Vandamme, L.K.J.; Vajtai, R.; Kruis, F. E.; Kruis, F.E.; Fissan, H.
November 2000
Applied Physics Letters;11/20/2000, Vol. 77 Issue 21
Academic Journal
Charge transport in monocrystalline lead sulfide (PbS) nanoparticle films is investigated by current noise measurements. Monocrystalline and single-sized PbS nanoparticles are synthesized via the gas phase and deposited electrostatically onto semiconducting (GaAs) and on isolating (SiN[sub x]) substrates with planar electrode contacts. The particles form inhomogeneous films. Low-frequency current noise of 1-ML-thick films are measured at various voltages, exhibiting diffusion noise characteristics, which indicates a random-walk (diffusion) phenomenon of electrons between the particles. © 2000 American Institute of Physics.


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