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Browsing 13.Materials of Forums, Conferences and Projects by Author "Ullrich, B."
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Bhowmick, M.; Ullrich, B.; X i, H.; Flores, D.A.
(Nazarbayev University, 2014)
Comprehensive knowledge of the optical properties, particularly of the room
temperature (RT) photoluminescence (PL), of ZnO is essential for the future employment of this wideband
gap (~3.3 eV at 300 K) II-VI compound ...
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Bhowmick, M.; Ullrich, B.; X i, H.; Flores, D. A.
(Nazarbayev University, 2014)
Exciting a semiconductor through light absorption produces photoluminescence (PL).
In general, the emitted energy is lower than the energy absorbed. The phenomenon, first discovered
in the nineteenth century, is known ...
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Bhowmick, M.; Ullrich, B.
(Nazarbayev University, 2013)
We employed ZnO single crystals obtained commercially. The crystals are 99.99% pure, and fit for measurements of optical properties. Among the equipments, UV-VIS Spectrometer from PerkinElmer for TR% and RE% were used, and ...