Time evolution of packaged LED lamp degradation in outdoor applications
Source abstract
Abstract
Abstract Degradation of Silicone used in high power white LEDs as molding material has significant impact on the LED's lifetime and efficacy. This work provides a detail study on the impact of moisture, temperature and thermal aging on the packaging materials by tracing its progression of degradation under high temperature and humidity conditions. Silicone degradation via discoloration and cracks formation is identified and its cracks depth is found to decrease as the time progressesdue to diffusion mechanism and this led to highly distorted surface. It is found that Silicone undergo hydrolysis, condensation, thermal oxidation and thermal aging over its lifespan, and discoloration is mainly due to hydrolysis while cracks formation is mainly due to thermal oxidation. The decrease in the crack depth is due to thermal aging where diffusion of silicon oligomer occurs.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Thin-Film Transistor Technologies · GaN-based semiconductor devices and materials · High voltage insulation and dielectric phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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