研究目的
Investigating the sulfur corrosion in LEDs that leads to reduced luminous flux, color temperature drift, and in severe cases, LED damage, to improve LED reliability.
研究成果
The study concludes that sulfur corrosion significantly affects LED reliability by causing blackening of the silver layer, leading to reduced luminous flux and color temperature drift. The corrosion path was identified, and recommendations for avoiding sulfur corrosion were provided.
研究不足
The study focuses on sulfur corrosion in LEDs but may not cover all potential corrosion sources or environmental conditions affecting LED reliability.
1：Experimental Design and Method Selection:
The study employed SEM&EDS, TOF-SIMS, and AES to analyze sulfur corrosion in LEDs.
2：Sample Selection and Data Sources:
Failure samples of 2835 SMD LED were analyzed.
3：List of Experimental Equipment and Materials:
SEM&EDS, TOF-SIMS, AES, and C-SAM were used.
4：Experimental Procedures and Operational Workflow:
Samples were tested for delamination, decapsulated mechanically, and analyzed for sulfur presence and corrosion morphology.
5：Data Analysis Methods:
The presence of sulfur and its impact on LED components were analyzed using the mentioned techniques.
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