Theoretical and experimental analysis of AlGaInP micro-LED array with square-circle anode Conference Paper uri icon

abstract

  • An array of 320 240 micro-light-emitting diodes (micro-LEDs) based on an AlGaInP epitaxial wafer and with a unit size of 100 m100 m was designed and fabricated. The optimum width of the isolation groove between adjacent light-emitting units was determined based on a compromise between full isolation of each LED and maximization of the light emitting area, and was found to be 20 m. The grooves were filled with a mixed Si granule-polyurethane composite medium, because this type of insulating material can reflect part of the emitted light from the sidewall to the window layer in each light-emitting unit, and could thus improve lighting output efficiency. The 10-m-wide square-circle anode was designed to increase the light emitting area while simultaneously being simple to fabricate. The device current used was in the 0.421.06 mA range to guarantee internal quantum efficiency of more than 85%, with a corresponding voltage range of 22.3 V. The layered temperature distribution in a single unit was simulated under a drive voltage of 2.2 V, and the maximum device temperature was 341 K. The micro-opto-electro-mechanical systems (MOEMS) technology-based fabrication process, experimental images of the device and device test results are presented here.

published proceedings

  • AIP ADVANCES

author list (cited authors)

  • Tian, C., Wang, W., Liang, J., Liang, Z., Qin, Y., & Lv, J.

citation count

  • 9

complete list of authors

  • Tian, Chao||Wang, Weibiao||Liang, Jingqiu||Liang, Zhongzhu||Qin, Yuxin||Lv, Jinguang

publication date

  • April 2015