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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.42 [2004] >
IJPAP Vol.42(08) [August 2004] >
| Title: | Space charge limited conduction in Se80-xTe20Agx thin films |
| Authors: | Singh, S P
Kumar, S
Kumar, A |
| Keywords: | dc Conductivity
Se80-xTe20Agx thin films
Space charge limited conduction |
| Issue Date: | Aug-2004 |
| Publisher: | CSIR |
| IPC Code: | G 01R |
| Abstract: | The dc conductivity measurements at high electric fields in vacuum evaporated thin films of amorphous Se80-xTe20Agx
(x=0,5,10,15) have been
reported. The current-voltage (I-V) characteristics have been measured
at various fixed temperatures. In all the samples ohmic behaviour is observed
at low electric fields. However, at high electric fields (E~104V/cm),
non- ohmic behaviour is observed. An analysis of the experimental data confirms
the presence of space charge limited conduction (SCLC) in all the glassy
materials studied in present case. From the fitting of the data in the theory
of SCLC, the density of defect states near the Fermi level is calculated. It is
concluded from the results obtained that the density of defect states do not
change significantly with increasing concentration of Ag in the pure binary Se80Te20
system. |
| Page(s): | 615-620 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.42(08) [August 2004]
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