Abstract
The most significant revolution in artificial lighting is prompted by the work of 2014 Nobel laureates who developed efficient blue light-emitting diodes enabling bright and energy saving phosphor-converted white light-emitting diodes (pc-WLEDs). However, the most critical property is the thermal stability of phosphors, since, in general, emission losses occur during LED operation due to heat generation (~200˚C), which is detrimental to pc-WLEDs and this process is known as thermal quenching (TQ). In this talk, different techniques have been employed to enhance the thermal stability of phosphor, such as making solid-solution of phosphors, applying ceramic coatings onto phosphor surfaces, and glass ceramic phosphor. Also we report the first of the self-healing blue phosphor that does not exhibit TQ, and sustains its emission intensity up to 200°C.
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