Radiation Effects in Semiconducting Laser Materials.
Abstract
Luminescence of pure CdSe, CdS and CdSSe has been investigated in the temperature range from about 6K to 80K. At low temperature, the stimulated luminescence of a CdSe platelet consists of several laser peaks depending upon the platelet under study and the level of its excitation. Some of the laser peaks appear to be correlated to the spontaneous lines seen in our measurements, and reported as well as interpreted by other investigators. Irradiation of CdSe platelets with fast neutrons introduces new laser lines which are shifted towards longer wavelengths. These results are interpreted in terms of the decay of excitons bound to defects. Some effects of chemical doping have also been investigated. Broad band edge emission, which is absent in the pure crystals, appears very strong on doping CdS and CdSe with NaCl. This suggests that Na and Cl are the impurities responsible for the pair emission, which is consistent with the suggestion of Henry and Thomas that Na acts as an acceptor and Cl as a donor in these materials. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1971
- Accession Number
- AD0727061
Entities
People
- B. M. Arora
Organizations
- University of Illinois Urbana–Champaign