Abstract:
The cathodeluminescence emission spectrum of Er3+ in cadmium Telluride at 10 K has been studied before and after irradiation with electrons capable of producing atomic displacements. Cadmium Telluride had been previously implanted by 50 KeV Er3+ ions and given suitable post-unplantation annealing treatment. It has been observed that the Er3+ emission intensity at 7907 Å was found to increase with electron damage above a certain threshold energy. In case of monitoring the production of cation displacement yields, a threshold incident electron energy of 255 keV for enhancement ( ~~ 5.66 eV cadmium displacement threshold energy). Warming the electron-damaged samples to temperature greater than 260 oC allows complete removal of the defects produced by the electron damage. Study of the intensity decreases as a function of electron fluence for those Er3+ emission peaks which are reduced by damage show the rare earth excitation process to be indirect.
Page(s):
123-126
DOI:
DOI not available
Published:
Journal: Science International, Volume: 15, Issue: 2, Year: 2003