1. Results and discussion 34.6

2. Results and discussion

3. Turn-on ： PSS 2.93V UPSS 2.97V Vf ： PSS 3.08V UPSS 3.19V

4. Results and discussion 2.53 倍

5. Conclusion The disloca- tion density would be reduced greatly and higher extraction efficiency could be achieved from lens-shaped PSS. Our work brings out GaN-based LED structure with better performance for the next generation of high-brightness blue LEDs using the PSS method.

6. References Seong-Muk Jeong, SuthanKissinger, Dong-WookKim, SeungJaeLee, Jin-SooKim, Haeng-Keun Ahn, Cheul-RoLee “Characteristic enhancement of the blue LED chip by the growth and fabrication on patterned sapphire (0 0 0 1) substrate,” Journal of Crystal Growth 312 (2010) 258–262.

7. Thanks for your attention !