OPTICAL AND ELECTRICAL PROPERTIES OF DIAMOND.
Annual summary rept. no. 2, 1 Nov 64-31 Oct 65,
SOREQ RESEARCH ESTABLISHMENT ISRAEL ATOMIC ENERGY COMMISSION YAVNEH
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THERMOLUMINESCENCE OF SEMICONDUCTING AND INSULATING DIAMONDS Glow curves showed peaks near 150 and 250 degrees K. Blue thermoluminescence could be excited by wavelengths up to 0.4 micron. Red -emitting glow peaks were found at 175 and 290 K that could be excited up to about 0.6 micron. DARK CURRENT AND PHOTOCONDUCTIVITY IN SEMICONDUCTING DIAMOND Direction of rectification between 80 and 373 K indicated p-type conductivity. ELECTROLUMINESCENCE EL OF SEMICONDUCTING DIAMONDS At low temperature the emission spectrum was mainly blue, the red becoming comparatively stronger at higher temperature. Plots of the log of the EL brightness vs 1square root of V gave 2 straight lines differing in slope, with higher slope at higher voltages. EL was observed with voltages smaller than the 5.5-ev band gap. THEORETICAL INVESTIGATIONS see also AD-621 037, AD-621 038 Kinetics of luminescence were investigated when electrons are excited to the conduction band before falling to a center and when transition is through a discrete excited state.
- Solid State Physics