Influence of Pre-trimethylindium flow treatment on blue light emitting diode

• Pre-trimethylindium treatment can lead to longer wavelength.
• External quantum efficiency can be improved effectively.
• Electrical properties are not decreased using Pre-trimethylindium treatment.

The effects of Pre-trimethylindium (TMIn) flow treatment prior to quantum well growth on blue light emitting diode properties were investigated. High-resolution X-ray diffraction indicated that Pre-TMIn flow treatment did not change the composition of indium in quantum wells, but influenced electrical and optical properties of blue light emitting diode. Electroluminescence exhibited redshift with increasing TMIn treatment time. Though, the forward voltage became a little larger with longer Pre-TMIn treatment time due to the slight phase separation and indium aggregation, the efficiency droop of the device was improved effectively.