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Dynamical electrophotoconductivity in polycrystalline thin films
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kowel, S. T. Kornreich, P. G. |
| Copyright Year | 1982 |
| Description | Polycrystalline cadmium sulfide (CdS) films were deposited on lithium niobate (LiNbO3) substrates by vacuum evaporation and annealed to obtain high photosensitivity. The change in photoconductivity of these films due to the penetration of electric fields associated with elastic waves propagating on their substrates was demonstrated and studied. The relationship between the acoustic electric field and the induced change in film conductivity was found to be a nonlinear one. The fractional change in conductivity is strongly dependent on the light intensity and the film temperature, showing a prominent maximum as a function of these quantities. The largest recorded fractional change in conductivity was about 25% at electric fields of the order of 1,000 volts per centimeter. A phenomological model was developed based on the interaction between the space charge created by the electric field and the electron trapping states in the photoconductor. |
| File Size | 4436140 |
| Page Count | 65 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19830009065 |
| Archival Resource Key | ark:/13960/t8qc4vb2m |
| Language | English |
| Publisher Date | 1982-12-01 |
| Access Restriction | Open |
| Subject Keyword | Solid-state Physics Temperature Dependence Cadmium Sulfides Space Charge Thin Films Luminous Intensity Semiconducting Films Band Structure of Solids Trapped Particles Impurities Lithium Niobates Mathematical Models Photoconductivity Electric Fields Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
