| Summary: | 碩士 === 國立中央大學 === 光電科學研究所 === 100 === In this thesis, we build the optical model by TracePro based on Monte Carlo ray tracing method. Under different substrate in GaN LED, we analyze the light extraction efficiency (LEE) with different chip shaping angles. In the case of the SiC-based GaN LEDs, the slanted angle in 60°, with lens encapsulation, the LEE reaches 52.24%. Furthermore, we analyze the enhancement of the directionality and the LEE when the slanted angles of the cone array are different by changing surface texture of Thin GaN LED. In the case of Thin-GaN LEDs with diffuse reflector, the slanted angle of 65°with lens encapsulation, where the LEE reaches 81.16%.
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