Abstract
We present noise characteristics of luminescent porous silicon and show that they shed light on the transport mechanism in this system. The 1/f fluctuations show non-Gaussian and nonlinear behavior, and they give a high Hooge factor, typical of disordered conductors. By carrying out the measurements under various bias conditions, we found a bias-dependent redistribution of the percolating current paths. The close resemblance between the present results and those found in granular metals suggests that a tunneling process controlled by the electrostatic energy determines the conduction paths between the nanocrystallites in luminescent porous silicon.
Original language | English |
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Pages (from-to) | 1427-1429 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 74 |
Issue number | 10 |
DOIs | |
State | Published - 8 Mar 1999 |