Efficient tunable luminescence of SiGe alloy sheet polymers

Vogg, G.; Meyer, A. J.-P.; Miesner, C.; Brandt, M. S.; Stutzmann, M.
June 2001
Applied Physics Letters;6/18/2001, Vol. 78 Issue 25, p3956
Academic Journal
Crystalline SiGe alloy sheet polymers were topotactically prepared from epitaxially grown calcium germanosilicide Ca(Si[sub 1-x]Ge[sub x])[sub 2] precursor films in the whole composition range. These polygermanosilynes are found to be a well-defined mixture of the known siloxene and polygermyne sheet polymers with the OH groups exclusively bonded to silicon. The optical properties determined by photoluminescence and optical reflection measurements identify the mixed SiGe sheet polymers as direct semiconductors with efficient luminescence tunable in the energy range between 2.4 and 1.3 eV. © 2001 American Institute of Physics.


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