Three-dimensional Self-assembled Columnar Arrays of AlInP Quantum Wires for Polarized Micron-sized Amber Light Emitting Diodes

TL;DR

This paper reports the development of three-dimensional self-assembled AlInP quantum wire arrays that produce highly polarized yellow-orange light, with potential applications in efficient polarized LEDs.

Contribution

It introduces a novel 3D self-assembled quantum wire system with high polarization and efficiency, surpassing traditional quantum wells in performance.

Findings

Achieved over 200 wires per column without defects.

Demonstrated room-temperature internal quantum efficiency higher than quantum wells.

Proved high polarization and reduced parasitic currents in prototype LEDs.

Abstract

A three-dimensional ordered and self-organized semiconductor system emitting highly-polarized light in the yellow-orange visible range (580-650 nm) is presented, comprising self-assembled in-plane AlInP wires vertically stacked in regularly-spaced columns. More than 200 wires per column without detectable defect formation could be stacked. Theoretical simulations and temperature-dependent photoluminescence provided a benchmark to engineer multilayered structures showing internal quantum efficiency at room temperature larger than comparable quantum wells emitting at similar wavelengths. Finally, proof-of-concept light emitting diodes (LED) showed a high degree of light polarization and lower surface parasitic currents than comparable quantum well LEDs, providing an interesting perspective for high-efficiency polarized yellow-orange light emitting devices.