Enhanced performance of InGaN light-emitting diodes with InGaN and composition-graded InGaN interlayers
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The effects of InGaN light-emitting diodes (LEDs) with InGaN and composition-graded InGaN interlayers in the space of multiple quantum wells and electron blocking layer are studied numerically. The electrostatic field, energy band diagrams, carrier concentrations, light–current–voltage performances, and internal quantum efficiency (IQE) are investigated. Simulation results show that the light output power and IQE are both largely improved over the conventional LED structure due to the improvement in hole injection efficiency and electron blocking capability, especially for the LED with composition-graded InGaN interlayer.
KeywordsBarrier Height Internal Quantum Efficiency Energy Band Diagram Potential Barrier Height Electron Blocking Layer
This work was supported by 973 Program (No. 2011CB301901-5).
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