Analysis of Size-Dependent Quantum Efficiency in AlGaInP Micro-Light-Emitting Diodes with Consideration for Current Leakage
Journal
IEEE Photonics Journal
Journal Volume
14
Journal Issue
1
Date Issued
2022
Author(s)
Abstract
This study fabricated and analyzed AlGaInP-based red micro-light-emitting diodes (LEDs) ranging from 2 to 15 μm in size. To collect photons from a single micro-LED at this scale, a solar cell chip near the micro-LEDs was used. Quantum efficiency decreased at a faster rate than that predicted by the standard ABC model under high currents, and a leakage current component was added to fully describe this phenomenon. The modified model can be used to extract valuable information regarding the micro-LEDs, such as the Shockley-Read-Hall coefficient. A size dependency analysis revealed that the bulk Shockley-Read-Hall coefficient and surface recombination velocity of the micro-LEDs were 6.81 × 107 1/sec and 5.99 × 104 cm/sec, respectively. Further analysis of the size-dependent recombination effect can help us solve the side wall problem and maximize the light output of AlGaInP-based micro-LEDs for ultrahigh-resolution displays. ? 2009-2012 IEEE.
Subjects
Display
leakage current
light-emitting diode
quantum well device
radiative recombination
Aluminum alloys
Efficiency
Gallium alloys
III-V semiconductors
Indium alloys
Leakage currents
Light
Light emitting diodes
Passivation
Photovoltaic cells
Quantum efficiency
Semiconductor alloys
Semiconductor quantum wells
Solar cells
Cell chips
Current leakage
Faster rates
Lightemitting diode
Quantum well device
Radiative recombination
Semiconductor device measurements
Size dependent
Photoelectrochemical cells
SDGs
Type
journal article