PhD defence: Transition metal doped phosphors for LEDs A study of temperature dependent luminescence of manganese and chromium

Phosphors are a group of materials that convert light of one colour to the other. These materials are essential for modern LED lighting and screens. It is known that at elevated temperatures phosphors are no longer capable of this transition. This results in an overall drop of efficiency of the LED. In this thesis, we studied the physical origin of this drop in luminescence for phosphor, that contain either the element chromium or manganese.