4 January 2008 Research and fabrication of high power LEDs with transparent electrodes
Author Affiliations +
In this paper we studied the influence of N electrode on the extraction efficiency of high power light-emitting diodes (LEDs). Simulation and experimental results show that comparing with traditional metal N electrodes the extraction efficiency of LEDs with transparent N electrode is increased by 15%, and it is easier in process than the other techniques. So we proposed a new kind of strip LEDs with transparent electrodes on both P-GaN and N-GaN. The design of transparent electrodes was trade-off between transmittance and resistance. At the same time, the strip structure has some advantages over the traditional square LEDs, which can increase the extraction efficiency and reduce the thermal resistance. Antireflective and high reflective optical coatings were also used in this design. The fabrication of LEDs with transparent electrodes on both P-GaN and N-GaN has been demonstrated. The output power of blue LEDs is 240mW at 350mA, forward voltage is below 3.5V. The luminous flux of white LEDs reached 65lm at 350mA.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xiaoyan Yi, Xiaoyan Yi, Libin Wang, Libin Wang, Jingmei Fan, Jingmei Fan, Xiaodong Wang, Xiaodong Wang, Hua Yang, Hua Yang, Yan Li, Yan Li, Liangchen Wang, Liangchen Wang, Guohong Wang, Guohong Wang, Fuhua Yang, Fuhua Yang, } "Research and fabrication of high power LEDs with transparent electrodes", Proc. SPIE 6841, Solid State Lighting and Solar Energy Technologies, 68410B (4 January 2008); doi: 10.1117/12.765244; https://doi.org/10.1117/12.765244

Back to Top