Quantum Dot Patents

Quantum dot patents span colloidal nanocrystal synthesis; core-shell passivation chemistry; quantum dot film and display integration; quantum dot LED electroluminescence device; and quantum dot bioimaging conjugation — with IP concentrated in display companies; materials companies; and early quantum dot chemistry pioneers: MAJOR QUANTUM DOT PATENT HOLDERS: SAMSUNG ELECTRONICS: 5,000+; specific quantum dot display (specific specific QLED quantum dot enhancement film QDEF: specific specific CdSe/ZnS core/shell red+green quantum dot in specific specific polymer matrix film between specific specific LED backlight and specific specific color filter for specific specific color conversion from specific specific 450nm blue LED pump to specific specific 530nm green + specific specific 630nm red with specific specific FWHM 20-30nm narrowband emission for specific specific NTSC 100%+ Rec.2020 wide color gamut vs. specific specific phosphor broad FWHM 80-100nm; specific specific QD-OLED: specific specific Samsung Display quantum dot color filter QDCF from specific specific InP QD patterned layer on specific specific blue OLED emitter for specific specific self-emissive QD-OLED for specific specific DCI-P3 99%+ gamut at specific specific 1000 nit peak for specific specific Samsung S90C QD-OLED TV); NANOSYS (SAMSUNG ACQUIRED 2022): 1,000+; specific quantum dot core-shell (specific specific CdSe/CdS/ZnS multi-shell QD: specific specific hot-injection synthesis in specific specific octadecene+oleic acid at specific specific 300°C for specific specific 3nm CdSe core + specific specific CdS shell + specific specific ZnS outermost shell for specific specific PLQY photoluminescence quantum yield >95% + specific specific FWHM 22-25nm for specific specific high-purity red+green display QD; specific specific InP/ZnS/ZnSe cadmium-free QD: specific specific indium phosphide core 3-5nm from specific specific In(MA)3+P(TMS)3 at specific specific 180°C + specific specific ZnSe/ZnS shell for specific specific 530nm FWHM 35nm for specific specific EU RoHS cadmium-free compliance at specific specific Rec.2020 green point); NANOCO TECHNOLOGIES: 200+; specific cadmium-free QD (specific specific InP/ZnS/ZnSe core-multishell: specific specific Nanoco CFQD cadmium-free FWHM <30nm InP for specific specific Samsung licensing agreement 2013 for specific specific RoHS-compliant QLED TV; specific specific molecular cluster route: specific specific pre-formed In-P molecular cluster as specific specific sacrificial template for specific specific uniform 3-5nm InP nucleation for specific specific narrow size distribution vs. specific specific conventional hot-injection for specific specific improved PLQY 80%+); QD VISION (SAMSUNG ACQUIRED 2016): 500+; specific quantum dot optics; QUANTUM SOLUTIONS / 1-MATERIAL; NAJING TECHNOLOGY; TCL CSOT: 1,000+ combined; THERMO FISHER SCIENTIFIC: 500+ bioimaging QD.

Quantum dot LED devices with electroluminescent colloidal QD as the active emitter layer; perovskite quantum dot synthesis and stabilization for LED and display applications; and QD-OLED hybrid integration combining organic blue OLED emitter with patterned quantum dot color filter represent three technically differentiated high-value quantum dot innovation domains: QLED ELECTROLUMINESCENCE PATENTS: SAMSUNG; TCL CSOT; NAJING; QD VISION; NANOPHOTONICA; LGIC; AVANTAMA: specific QLED EL device (specific specific inverted QD-LED: specific specific ITO anode + specific specific ZnO ETL electron transport layer + specific specific QD emitter layer from specific specific spin coat or specific specific inkjet print at specific specific 20-40nm thickness + specific specific TFB/PVK HTL hole transport layer + specific specific MoOx/Ag cathode for specific specific 100,000 nit peak luminance at specific specific 12% EQE external quantum efficiency for specific specific red QD-LED from specific specific CdSe/CdS/ZnS core-shell vs. specific specific OLED 6-8% EQE red; specific specific QD-LED lifetime: specific specific T50 at specific specific 1000 nit 100,000 hour operational lifetime for specific specific red at specific specific constant current drive in specific specific encapsulated device for specific specific display application competitive lifetime; specific specific inkjet QD printing: specific specific QD ink in specific specific hexane+octane solvent at specific specific 5-10 mg/mL for specific specific inkjet deposition at specific specific 100×100μm pixel from specific specific Epson industrial piezo head for specific specific self-emissive QLED display vs. specific specific photolithography QDCF); PEROVSKITE QD PATENTS: MIT BAWENDI GROUP; CAMBRIDGE; NANOPHOTONICA; QUANTUM SOLUTIONS; LGIC; SHARP: specific perovskite QD (specific specific CsPbX3 all-inorganic perovskite QD: specific specific cesium lead halide from specific specific CsCO3+PbBr2+oleylamine+oleic acid hot injection in specific specific octadecene at specific specific 150-200°C for specific specific cube-shape nanocrystal 8-12nm for specific specific PLQY 90%+ FWHM <20nm at specific specific 512nm green for specific specific best-in-class color purity + specific specific EL external quantum efficiency 23%+ for specific specific LED application; specific specific perovskite QD stability: specific specific silica/polymer shell encapsulation for specific specific moisture+oxygen+heat stability for specific specific T50 >10,000h at specific specific ambient storage for specific specific practical display material vs. specific specific bare CsPbX3 hours-level instability; specific specific lead-free perovskite: specific specific Cs3Bi2Br9+Cs3Cu2I5 for specific specific non-toxic alternative at specific specific reduced PLQY 60-70% vs. specific specific Pb-based); QD-OLED PATENTS: SAMSUNG DISPLAY; SONY; LG DISPLAY; AU OPTRONICS: specific QD-OLED (specific specific blue OLED+QDCF hybrid: specific specific Samsung Display InP QD photoresist layer patterned by specific specific photolithography at specific specific 3×3μm sub-pixel for specific specific quantum dot color filter QDCF on specific specific blue OLED emitter for specific specific self-emissive QD-OLED at specific specific RGB from specific specific single blue emission source for specific specific DCI-P3 99%+ at specific specific 1000 nit; specific specific Sony Bravia QD-OLED: specific specific licensed Samsung QD-OLED panel for specific specific A95L Bravia XR QD-OLED with specific specific Sony Cognitive Processor XR scene analysis for specific specific contrast+color optimization from specific specific perfect black OLED + specific specific QD color purity).

Quantum dot bioconjugation for bioimaging and diagnostics; colloidal quantum dot solar cells exploiting multiple exciton generation; and quantum dot infrared photodetector arrays for sensing beyond silicon bandgap represent three additional quantum dot application domains with active patent development: QUANTUM DOT BIOIMAGING PATENTS: THERMO FISHER SCIENTIFIC (QDOT); LIFE TECHNOLOGIES (THERMO FISHER); UNIVERSITY OF CALIFORNIA GUYOT-SIONNEST; QUANTUM DOT CORPORATION (THERMO FISHER): specific bioimaging QD (specific specific streptavidin-QD bioconjugate: specific specific Thermo Fisher Qdot 655 from specific specific CdSe/ZnS core/shell + specific specific polymer amphiphile encapsulation water solubilization + specific specific streptavidin surface conjugation for specific specific biotin target labeling for specific specific single-molecule fluorescence imaging + specific specific flow cytometry at specific specific 655nm narrow emission peak vs. specific specific organic dye broad+fast photobleaching; specific specific QD multiplexing: specific specific 5-10 QD color panel from specific specific 400nm single excitation for specific specific FWHM 20-30nm each color for specific specific simultaneous multicolor cell labeling+imaging for specific specific flow cytometry multiplexed cell phenotyping; specific specific in vivo QD: specific specific PEGylated CdSe/ZnS QD for specific specific blood circulation half-life >8h for specific specific tumor passive accumulation EPR enhanced permeability retention effect for specific specific fluorescence image-guided surgery + specific specific sentinel lymph node mapping); QUANTUM DOT SOLAR CELL PATENTS: MIT BULOVIC; NREL; SOLAR FRONTIER; ZHIQUN LIN IOWA STATE; LOS ALAMOS: specific QD solar cell (specific specific MEG multiple exciton generation: specific specific PbSe+PbS colloidal QD from specific specific bulk-forbidden MEG from specific specific single high-energy photon for specific specific 2-3 exciton generation for specific specific >100% IQE theoretical Shockley-Queisser breakthrough for specific specific multi-exciton extraction QD solar cell; specific specific QD sensitized solar cell: specific specific CdS/CdSe QD adsorbed on specific specific TiO2 nanoparticle film for specific specific quantum-confined absorption onset tuning for specific specific broad spectrum harvest); QUANTUM DOT IR SENSOR PATENTS: SWIR VISION SYSTEMS; INVISAGE; QUANTUM SOLUTIONS; PLANCK; IGNIS: specific QD IR sensor (specific specific PbS QD photodetector: specific specific ligand-exchanged PbS colloidal QD film from specific specific 1700nm infrared absorption at specific specific 5nm QD diameter for specific specific CMOS-compatible solution-processed deposition for specific specific SWIR 900-1700nm InGaAs-alternative detector at specific specific EQE 60%+ at specific specific 1300nm for specific specific LiDAR+facial recognition+machine vision; specific specific MWIR HgTe QD: specific specific mercury telluride QD 3-5μm MWIR absorption for specific specific CMOS-integrated thermal imaging at specific specific 300K without specific specific cryogenic cooling for specific specific compact MWIR camera alternative to specific specific cooled MCT HgCdTe).

Quantum dot startup IP strategy must navigate one of the densest material-science patent landscapes in display technology, with Samsung&apos;s acquisition of both QD Vision and Nanosys having consolidated key early quantum dot display IP: QUANTUM DOT STARTUP IP STRATEGY: UNDERSTAND THE QUANTUM DOT PATENT LANDSCAPE: SAMSUNG DOMINANCE IN QD DISPLAY: Samsung acquired QD Vision (2016) and Nanosys (2022) — consolidating the two most important independent quantum dot display IP portfolios alongside Samsung&apos;s own 5,000+ QD patents; any quantum dot display company must FTO against this combined portfolio; NANOCO&apos;S CADMIUM-FREE QD IP: Nanoco (UK) has focused on InP/ZnSe/ZnS cadmium-free QD IP for EU RoHS compliance — had Samsung licensing agreement 2013; ongoing enforcement; relevant for any InP-based QD display; MIT BAWENDI GROUP = QD CHEMISTRY FOUNDATION: Bawendi (MIT) developed hot-injection QD synthesis in 1993 — foundational synthesis IP largely expired; perovskite QD more recent and less patent-dense; THERMO FISHER QDOT BIOIMAGING: Thermo Fisher holds Qdot/Life Technologies bioimaging QD IP from early 2000s with streptavidin/polymer encapsulation claims — relevant to QD diagnostic and bioimaging startups; WHEN TO PATENT IN QUANTUM DOT: NOVEL QD SYNTHESIS WITH MEASURED PROPERTY IMPROVEMENT: specific novel synthesis method (specific specific hot injection parameter set or specific specific continuous flow reactor configuration or specific specific ligand exchange protocol) with specific measured PLQY % + specific specific FWHM nm + specific specific shell thickness Å + specific specific size distribution PDI coefficient of variation % vs. specific specific prior art synthesis — essential to show specific property improvement to overcome prior art breadth from Samsung/Nanosys/Nanoco; NOVEL QD-LED DEVICE ARCHITECTURE WITH MEASURED EFFICIENCY+LIFETIME: specific novel QD-LED stack architecture (specific specific ETL composition + specific specific interface treatment + specific specific HTL material) with specific measured EQE % at specific specific luminance nit + specific specific T50 lifetime hours at specific specific luminance nit + specific specific pixel pitch μm for specific specific inkjet printed QLED vs. specific specific prior art inverted QD-LED device architecture; NOVEL PEROVSKITE QD WITH MEASURED STABILITY IMPROVEMENT: specific novel stabilization approach (specific specific shell composition + specific specific ligand + specific specific encapsulation matrix polymer) with specific measured T50 hours at specific specific temperature/humidity condition + specific specific PLQY retention % after specific specific stability protocol vs. specific specific unencapsulated CsPbX3 or specific specific prior art encapsulation; NOVEL QD-SENSOR ARCHITECTURE WITH MEASURED DETECTIVITY: specific novel QD photodetector (specific specific QD material + specific specific ligand exchange + specific specific device architecture) with specific measured specific detectivity D* cm·Hz^0.5/W at specific specific wavelength nm + specific specific response speed μs + specific specific EQE % at specific specific wavelength vs. specific specific InGaAs baseline for SWIR or specific specific MCT for MWIR — compelling alternative detector value proposition; CADMIUM-FREE = REGULATORY MOAT: EU RoHS Directive restricts >100ppm Cd in electronics — any CdSe/ZnS QD display product faces EU market access restriction → InP/ZnSe cadmium-free QD provides regulatory moat in EU; TRADE SECRETS: specific QD synthesis reactor temperature-time profile; specific ligand exchange batch parameters; specific core-to-shell ratio for optimal PLQY; KEY FTO: Samsung 5,000+ QLED QDEF CdSe/ZnS hot injection PLQY 95%+; Nanosys (Samsung acquired) CdSe/CdS/ZnS multi-shell + InP/ZnS/ZnSe cadmium-free 530nm FWHM 35nm; Nanoco CFQD InP molecular cluster route PLQY 80%+ FWHM <30nm; MIT Bawendi CsPbX3 perovskite QD PLQY 90%+ FWHM <20nm; Samsung Display QDCF InP photoresist photolithography 3μm sub-pixel QD-OLED; Thermo Fisher Qdot streptavidin polymer encapsulation water-soluble bioconjugate; Swir Vision Systems PbS ligand-exchanged CMOS SWIR QD detector; QD Vision (Samsung) QD optics.