High-excitation photoluminescence studies of CdS1−x
Se
x
quantum dots |
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| Authors: | A Uhrig L Banyai Y Z Hu S W Koch C Klingshirn N Neuroth |
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| Institution: | (1) Universität Kaiserslautern, Postfach 3049, D-6750 Kaiserslautern, Federal Republic of Germany;(2) Optical Sciences Center, University of Arizona, 85721 Tucson, AZ, USA;(3) Physics Department, University of Arizona, 85721 Tucson, AZ, USA;(4) Schott Glaswerke, Hattenbergstrasse 10, D-6500 Mainz, Federal Republic of Germany;(5) Present address: Institut für Theoretische Physik, Universität Frankfurt, D-6000 Frankfurt/Main, Federal Republic of Germany |
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| Abstract: | Linear absorption and excitation dependent luminescence measurements on CdSSe quantum dots in glass are reported. The new aspects of the spectra are: (i) Stokes shift of linear emission versus absorption and (ii) appearance of new structures in the high energy wing of the luminescence peak under high excitation, which are interpreted as consequences of Coloumb effects, important for dot radii around the exciton Bohr radius. |
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