Green InGaN-based resonant-cavity light-emitting diodes (RC-LEDs) with integrated nanoporous (NP) GaN distributed Bragg reflectors (DBRs) were fabricated by using a selective electrochemical (EC) etching technique. The epitaxial structure comprised 25 alternating Si-doped GaN layers, forming a periodic high- and low-refractive-index stack after the EC etching process. The resulting porous-GaN DBR exhibited an effective refractive index of 2.02 and a stopband centered at 566 nm, achieving 98% reflectivity. By integrating a top-3-pairs dielectric mirror, the electroluminescence (EL) spectra showed a narrower full width at half-maximum (fwhm) from 41 nm (nontreated LED) to 12.8 nm (RC-LED). Polarization analysis revealed two spectral peaks at 536.7 and 544.7 nm, with one suppressed by a polarizer. The fwhm varied with the polarization direction, being 5.2 nm at 0° and 6.4 nm at 90°. These results demonstrate that integrating bottom porous GaN and top dielectric DBRs yields a high-reflectivity, low-loss RC structure suitable for high light coupling in fiber interconnection and high-color-purity micro-LED display applications. This publication is licensed under You are free to share (copy and redistribute) this article in any medium or format and to adapt (remix, transform, and build upon) the material for any purpose, even commercially within the parameters below: Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. *Disclaimer This summary highlights only some of the key features and terms of the actual license. It is not a license and has no legal value. Carefully review the actual license before using these materials. You are free to share (copy and redistribute) this article in any medium or format and to adapt (remix, transform, and build upon) the material for any purpose, even commercially within the parameters below: Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. *Disclaimer This summary highlights only some of the key features and terms of the actual license. It is not a license and has no legal value. Carefully review the actual license before using these materials. You are free to share (copy and redistribute) this article in any medium or format and to adapt (remix, transform, and build upon) the material for any purpose, even commercially within the parameters below: Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. *Disclaimer This summary highlights only some of the key features and terms of the actual license. It is not a license and has no legal value. Carefully review the actual license before using these materials.
Cheng et al. (Thu,) studied this question.