Abstract
In the alloy semiconductor CdS1-x Sex the statistical fluctuations of the band gap energy, due to the substituion of Sulphur by Selenium, localises electrons and holes and consequently the excitons. Measuring the ambipolar diffusion coefficient D in a degenerate four-wave mixing experiment directly proves the drastic reduction of mobility in comparison with the binary constituents.
© 1992 IQEC
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