| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXI
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| Presentation Title |
Morphological Effect of Patterned Sapphire Substrate on Efficiency of White-light Phosphor LED Package |
| Author(s) |
Chia-Yueh Chou, Cheng-Yi Liu |
| On-Site Speaker (Planned) |
Chia-Yueh Chou |
| Abstract Scope |
Six-facets patterned sapphire substrates (A-PSS) are manufactured by wet-etching regular semispherical patterned sapphire substrates (r-PSS). MOCVD GaN epitaxial LED structure was grown on the c-plane sapphire wafer, r-PSS, and A-PSS. Remarkably, the output power of the white-light packaged LED on the A-PSS is larger than the white-light packaged LED on the r-PSS. The Monte Carlo ray tracing simulation shows that, before and after silicone-lens encapsulating, the sidewall emission power ratio of LED on r-PSS decreases by 3.44% after encapsulating. On the other hand, the sidewall emission power ratio of the LED on A-PSS increases by 1.06% after encapsulating. The reason for LED on A-PSS having a less package loss and the white-light package efficiency than LED on r-PSS will be discussed. In conclusion, the light radiation distribution pattern defined by A-PSS is the key for the better white-light package efficiency of the LED on A-PSS. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Electronic Materials, Ceramics, Surface Modification and Coatings |