Red GaN LED external quantum efficiency at 20.8% - Semiconductor Today

A 20.8% EQE for red GaN LEDs is not an incremental step—it marks the paradigm shift from AlInGaP to InGaN/GaN at the long-wavelength end. Technical ripple: suppressing optical loss in InGaN quantum wells at 620-650 nm directly removes the single largest mass-production bottleneck in full-color micro-LED—red-pixel brightness uniformity during mass transfer. Upstream, MOCVD epitaxy windows (In/Ga, V/III ratios) require recalibration, pushing Aixtron and Veeco into another process-iteration cycle. Compliance exposure: core GaN epi-wafer capacity sits in Japan (Sumitomo Electric) and Taiwan, China (IHI), with Cree/Wolfspeed holding foundational IP. If Washington extends export controls to GaN epi tools—following the 2023 8-inch SiC equipment precedent—BOE and Visionox face a 15-25% epi cost uplift. Competitive dynamics: Samsung Display's all-GaN pixel roadmap accelerates, creating a generational gap over AlInGaP-dependent mid-tier panel makers. San'an Optoelectronics and HC SemiTek must close their InGaN red epitaxy yield gap within 18 months or forfeit micro-LED supply-chain relevance. Outlook: within 24 months, AR/VR near-eye displays (>4K per eye) become the dominant incremental demand driver. Legacy AlInGaP red lines enter capacity-clearance by 2026; industry CR5 concentration accelerates decisively.