Abstract
The effects of p- and n-electrode patterning on the current spreading and driving voltage of a side-view GaNsapphire light-emitting diode (LED) chip are investigated via a numerical simulation. The numerical results (current distributions) for the striped pattern p-electrode are well consistent with the optical emission patterns taken from emission images. A desirable uniformity of the current distribution in the active layer can be obtained by the appropriate arrangement of p- and n-electrode patterns. At the same time, a lower voltage drop in the LED chip is also obtained due to a more uniform current distribution in the p-GaN layer and a smaller overall distance for current movement in the n-GaN layer. With an injection current of 30 mA, a decrease in driving voltage of 13% for well-designed electrode patterns can achieve compared to the control devices considered in this study.
Original language | English |
---|---|
Journal | Journal of the Electrochemical Society |
Volume | 155 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2008 Sept 22 |
All Science Journal Classification (ASJC) codes
- Electrochemistry
- Surfaces, Coatings and Films
- Surfaces and Interfaces