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High quantum efficiency under blue LED excitation (450–470 nm), enabling superior luminous efficacy in white LED packages.
Excellent thermal and chemical stability, maintaining consistent photometric performance up to 150 °C in encapsulated LED modules.
Controlled particle size distribution (D50: 8–12 µm) for uniform dispersion in silicone and epoxy resins without sedimentation or agglomeration.
Low moisture absorption (<0.3 wt% at 60% RH), minimizing hydrolytic degradation during long-term operation and storage.
RoHS-compliant formulation with no intentional addition of lead, cadmium, mercury, or regulated heavy metals.
High-CRI general lighting LEDs (e.g., downlights, panel lights, and streetlights requiring Ra > 90).
Backlight units (BLUs) for premium LCD displays, including monitors and professional-grade TVs.
Automotive interior and exterior lighting, including instrument clusters and adaptive headlamps.
Horticultural lighting systems where broad-spectrum emission supports photosynthetic efficiency.
UV-pumped visible-light converters in specialty medical and sensing applications.
| Chemical Type | Silicate-based rare-earth doped phosphor (e.g., (Sr,Ba)₂SiO₄:Eu²⁺) |
| Product Form | Free-flowing fine powder |
| Appearance | Off-white to pale yellow crystalline powder |
| Primary Applications | Blue-pumped white LED conversion layer |
| Key Features | Broad yellow-green emission (peak ~540–560 nm), high color rendering index support |
| Benefits | Improved lumen maintenance (>95% after 6,000 hrs at 85 °C/85% RH in qualified packages) |
| Regulatory Compliance | RoHS 2015/863/EU, REACH SVHC-free (as declared), non-REACH Annex XIV listed |
| Storage Conditions | Sealed container, dry environment (<30% RH), 15–25 °C; use within 12 months of opening |
| Common Compatible Systems | Suitability |
| High-refractive-index phenyl-modified silicone (e.g., Dow SYLGARD™ 184 variants) | Highly Recommended – Excellent dispersion stability and minimal quenching |
| Epoxy resin encapsulants (e.g., Sumitomo EME-6000 series) | Recommended – Requires pre-drying and controlled mixing to prevent bubble formation |
| Acrylic-based LED gels (e.g., Shin-Etsu X-40-9203) | Suitable – Moderate viscosity compatibility; recommended for low-power indicator applications |
| Polymer-dispersed liquid crystal (PDLC) hybrid films | Suitable – Demonstrated compatibility in R&D-grade smart lighting laminates |
Q1: What is the CAS Registry Number for this silicate phosphor?
A: This product is a proprietary multi-component ceramic phosphor; it does not have a single CAS number. Batch-specific composition certificates and IUPAC-annotated material declarations are provided upon request for regulatory submissions.
Q2: What is the typical loading concentration when dispersing in silicone for LED packaging?
A: Standard loading ranges from 8–15 wt% relative to the total encapsulant mass, optimized per target CCT (2700K–6500K) and CRI requirement. Dispersion must be performed under vacuum degassing to avoid voids.
Q3: How does this silicate phosphor compare to YAG:Ce in terms of efficiency and color quality?
A: Compared to standard YAG:Ce, this silicate phosphor offers broader emission bandwidth, enabling higher CRI (Ra > 90) and improved R9 values at equivalent CCT, with slightly lower absolute quantum efficiency (~88–92% vs. YAG’s ~94%) but superior thermal resilience above 120 °C.
Q4: Is migration or leaching of rare-earth ions observed under humid operating conditions?
A: No measurable ion migration occurs under IEC 60068-2-78 humidity testing (85 °C/85% RH, 1,000 hrs) due to the dense, chemically inert silicate lattice structure and proprietary surface passivation.
Q5: Does this material require special handling for occupational safety?
A: It is classified as non-hazardous per GHS. Standard industrial hygiene practices apply: avoid inhalation of dust (use N95 respirator during manual handling), wear nitrile gloves, and ensure local exhaust ventilation during weighing and dispersion.
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E-mail: wangxingqiang@ericwchem.com
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