{"product_id":"nayf-yb-er-nd-nayf-core-shell-rare-earth-down-conversion-nanoparticles","title":"NaYF₄:Yb,Er, Nd@NaYF Core shell rare earth down conversion nanoparticles","description":"\u003cp\u003eProduct Name NaYF₄:Yb,Er,Nd@NaYF₄ core-shell lanthanide down-conversion nanoparticles Product Overview Matrix: NaYF₄ with a core-shell structure, core: NaYF₄:Yb³⁺\/Er³⁺\/Nd³⁺, inert shell: pure NaYF₄. Excitation wavelength: 808 nm near-infrared pumping, characteristic emission: 1550 nm near-infrared fluorescence, belonging to near-infrared to near-infrared downconversion (NIR→NIR downconversion); the inert NaYF₄ shell isolates surface defect quenching, significantly improving quantum efficiency and dispersion stability, with precise rare-earth doping ratios and stable batch luminescence consistency. Product Features Excitation at 1.808 nm, characteristic emission at 1550 nm, precise matching of communication infrared window Nd ³ ⁺ absorption of 808 nm photons, achieving Er ³ ⁺ 1550 nm near-infrared down conversion luminescence through Nd → Yb → Er stepwise energy transfer, avoiding interference from common excitation heat sources at 980 nm, and suitable for 808 commercial lasers. 2. Inert NaYF ₄ core-shell coating significantly improves luminescence efficiency. The passivation of the outer shell eliminates the fluorescence quenching caused by surface hydroxyl groups and defects of nanoparticles, resulting in a 2-4 times increase in luminescence intensity compared to shell free bare powder. It is resistant to water oxidation and solvent quenching. 3. Narrow half width fluorescence, pure spectrum without impurity peaks, sharp emission peak at 1550 nm, no visible light stray light interference, high signal-to-noise ratio, suitable for optical calibration and infrared sensing scenarios. 4. The nano particles are small in size and have excellent dispersivity. The monodisperse nanocrystals can be compounded with PMMA, hydrogel, PDMS and other polymers, and can easily be made into films, coatings, and doped composites. 5. Excellent physical and chemical stability. Fluoride matrix has strong chemical inertness, acid and alkali resistance, high temperature resistance, and far superior ability to inhibit photobleaching compared to oxide rare earth powder. It can be stored in the dark for a long time. Application Fields 1. Infrared optical sensing and biological imaging 1550 nm is located in the second near-infrared window of biological tissue (NIR-IIb), with deep tissue penetration and extremely low interference from autofluorescence. 808 nm excites near-infrared in vivo deep fluorescence imaging and cell labeling. 2. Materials related to fiber optic communication 1550 nm is the standard wavelength band for fiber optic communication, used for fiber doped gain powders, infrared waveguides, and precursor materials for optical amplification substrates. 3. Optical anti-counterfeiting and labeling 808 infrared laser excitation shows 1550 nm invisible infrared luminescence, with no bright light to the naked eye. High end bills and electronic components have invisible anti-counterfeiting ink\/coatings. 4. Infrared quantum cutting and photovoltaic efficiency enhancement Silicon based solar cells have a conversion enhancement coating that converts 808 high-energy infrared photons into 1550 nm matched silicon absorption spectra, improving photoelectric conversion efficiency. 5. Optical standard calibration and infrared light source calibration As a 1550 nm standard fluorescent reference powder, used for calibration of spectrometers and infrared detectors. 6. Flexible optoelectronic thin film  Preparation of near-infrared light-emitting flexible films and flexible photoelectric sensors by doping hydrogels\/polymers.\u003c\/p\u003e","brand":"xfnano","offers":[{"title":"50mg NaYF₄:Yb,Er,Nd@NaYF₄ 110483 \/ Store at 4°C refrigerated \/ 90days","offer_id":57280536576378,"sku":"110483","price":250.0,"currency_code":"USD","in_stock":true},{"title":"100mg NaYF₄:Yb,Er,Nd@NaYF₄ 110484 \/ Store at 4°C refrigerated \/ 90days","offer_id":57280536609146,"sku":"110484","price":390.63,"currency_code":"USD","in_stock":true},{"title":"200mg NaYF₄:Yb,Er,Nd@NaYF₄ 110485 \/ Store at 4°C refrigerated \/ 90days","offer_id":57280536641914,"sku":"110485","price":562.5,"currency_code":"USD","in_stock":true},{"title":"300mg NaYF₄:Yb,Er,Nd@NaYF₄ 110486 \/ Store at 4°C refrigerated \/ 90days","offer_id":57280536674682,"sku":"110486","price":742.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/3606\/6938\/files\/1_27871cef-ce01-415a-9a0e-d29d5e516d17.png?v=1780024497","url":"https:\/\/chinanano.com\/es\/products\/nayf-yb-er-nd-nayf-core-shell-rare-earth-down-conversion-nanoparticles","provider":"xfnano","version":"1.0","type":"link"}