Quantum Dot Photodetector Arrays 2026 — PatSnap Eureka
Quantum Dot Photodetector Array Technology: 2026 Patent & IP Landscape
From CQD-on-CMOS LIDAR integration to plasmonic focal plane arrays, quantum dot photodetector arrays are redefining infrared sensing. Explore the full IP landscape — assignees, clusters, and emerging whitespace — with PatSnap Eureka.
Quantum Confinement Meets CMOS: How QD Photodetector Arrays Work
Quantum dot photodetector arrays (QD-PDAs) exploit quantum confinement to engineer the bandgap of semiconductor nanocrystals, enabling spectral absorption tuning across a wide range simply by varying particle size. This makes them a compelling alternative to expensive epitaxial infrared detector materials such as HgCdTe and InGaAs, offering lower-cost, solution-processable, CMOS-compatible fabrication paths.
Three broad material classes dominate the innovation landscape: lead chalcogenide colloidal quantum dots (PbS, PbSe, PbTe) spanning visible to mid-infrared; self-assembled epitaxial quantum dots (InAs/GaAs, InAs/InP, Ge/SiGe) grown by molecular beam epitaxy for intersubband IR detection; and emerging hybrid systems combining colloidal QDs with 2D materials such as graphene and MoS₂ for enhanced charge transport. The patent analytics landscape reflects all three branches in active IP competition.
Array architectures range from focal plane arrays (FPAs) for imaging to nanoscale junction devices for single-photon detection. Integration with silicon CMOS readout integrated circuits (ROICs) is a persistent design theme, reflecting the commercial imperative to reduce the cost and complexity associated with traditional flip-chip bump-bonding hybridization. Plasmonic enhancement structures — particularly metallic nanohole arrays placed at the detector backside — appear across multiple filings as a method to boost optical absorption in quantum-confined active layers.
Ligand engineering — replacing long insulating ligands with short-chain or halide ligands — is critical for enabling carrier mobility sufficient for practical devices. The advanced materials IP landscape tracked by PatSnap reflects rapid evolution in this sub-domain.
From Laboratory Physics to Commercial LIDAR: 2009–2026
The patent and literature dataset spans approximately 2009 to 2026, revealing a field in active transition from foundational research toward product-grade system integration.
QD Photodetector Innovation Phases (2009–2026)
Three distinct innovation periods mark the field's progression from QDIP physics characterization to CQD-on-CMOS LIDAR product development.
Patent Activity by Application Domain
IR imaging and focal plane arrays represent the largest patent concentration; LIDAR/depth sensing shows the most recent filing momentum (2021–2026).
Four Core IP Clusters in Quantum Dot Photodetector Arrays
Patent and literature analysis via PatSnap Eureka identifies four distinct technology clusters driving QD photodetector innovation in 2026.
Colloidal QD Thin-Film Photodiodes & Phototransistors
The dominant approach involves solution-deposited CQD films sandwiched between charge-selective transport layers or integrated with a field-effect transistor channel. PbS and PbSe CQDs provide spectral coverage from 400 nm to 2,600 nm through size tuning. Key assignees include Emberion Oy (EP, 2019–2023) and University of Florida Research Foundation. Emberion's zero-bias architecture uses work-function-engineered built-in electric fields at both interfaces, eliminating the need for applied bias.
400 nm – 2,600 nm spectral rangeEpitaxial QDIPs with Plasmonic Enhancement
Self-assembled InAs or InGaAs QDs grown by molecular beam epitaxy exploit intersubband transitions for mid- and long-wave IR detection. The University of Massachusetts holds a five-patent US family covering backside surface plasmonic nanohole arrays that couple and concentrate incident IR radiation, addressing the low absorption efficiency inherent in thin QD layers. Filing history spans 2013–2020 with AFOSR-funded development. Any product team developing intersubband QD FPAs with optical enhancement structures should conduct a thorough FTO analysis against this family.
5 active US patents (U Mass)CQD-on-CMOS Arrays for LIDAR & Time-of-Flight
A commercially significant cluster involves depositing CQD photodetector layers directly onto CMOS ROICs at wafer scale, bypassing costly bump-bonding hybridization. Allegro MicroSystems filed US patents in 2023 and 2026 for CQD pn-junction photodetector arrays optimized for nanosecond-scale laser pulse response in LIDAR ToF applications. SWIR Vision Systems filed both WO and US applications for high-speed CQD systems achieving sub-5 ns rise times and sub-10 ns fall times. This is the single most commercially mature emerging direction in the dataset. Learn more about IP analytics for sensing technologies.
<5 ns rise time (SWIR Vision)Hybrid QD–2D Material & QD–Organic Heterostructures
Combining CQDs with 2D materials (graphene, MoS₂, WS₂) or organic semiconductors exploits the high carrier mobility of the channel material while the QD layer provides optical absorption and spectral tunability. Published results report responsivities up to approximately 1,400 A/W and detectivities reaching 10¹² Jones at room temperature at 1.8 µm. Research Triangle Institute patented QD-fullerene heterojunction photodiodes operable across UV/visible/IR bands. Emberion's 2023 EP filing integrates long-wave infrared pyroelectric detection with shorter-wavelength QD sensing on a single substrate. The advanced materials IP landscape is evolving rapidly in this area.
~1,400 A/W · 10¹² Jones detectivityWho Holds the Key QD Photodetector Array Patents?
Five distinct assignee organizations account for the majority of active patents directly on QD photodetector array technology in this dataset. US jurisdiction dominates, followed by EP filings.
Geographic concentration: US leads, EP follows, CN academic activity rising
US jurisdiction dominates active patents; Chinese institutions (Beijing Institute of Aerospace Systems Engineering, Peking University, Yunnan University) are represented heavily in literature but not yet in the patent record captured here.
Key Performance Metrics Across QD Photodetector Architectures
Performance benchmarks from patent filings and literature in the PatSnap Eureka dataset — all values traceable to primary sources.
Speed Performance: Rise Time by Architecture
CQD depth-sensing systems (SWIR Vision Systems) achieve <5 ns rise time; III-V CQD photodiodes (University of Toronto) demonstrate sub-nanosecond response.
Responsivity by QD Detector Architecture (A/W)
Hybrid PbS CQD–TMDC photodetectors lead with ~1,400 A/W at 1.8 µm; conventional CQD thin-film photodiodes operate at lower responsivity but offer simpler fabrication.
Five Strategic Implications for R&D and IP Teams
Derived directly from the 2026 patent and literature dataset. These signals should inform R&D investment priorities and IP strategy for any organization active in infrared sensing, LIDAR, or quantum photonics.
CMOS Integration Is the Critical Value Inflection Point
The shift from bump-bonded hybrids to wafer-scale CQD deposition on CMOS — as represented by Allegro MicroSystems (2026) and SWIR Vision Systems (2023–2025) — will be the primary determinant of commercial volume adoption in LIDAR, security, and industrial sensing. R&D investment and IP strategy should prioritize deposition process control, uniformity, and ROIC interface architecture.
University of Massachusetts FTO Constraint for Epitaxial QDIP FPA Developers
The five-patent US family covering backside plasmonic nanohole arrays for focal plane arrays remains active. Any product team developing intersubband QD FPAs with optical enhancement structures should conduct a thorough FTO analysis against this family before committing to product architecture. Consult PatSnap IP analytics for FTO workflows.
Five Directional Signals from the Most Recent Filings
Based on the most recent filings and publications (2022–2026) in this dataset, the following directional signals are evident for quantum dot photodetector array technology.
CQD-on-CMOS Wafer-Scale Integration for LIDAR
Both Allegro MicroSystems (2026) and SWIR Vision Systems (2023–2025) are pursuing CQD deposition directly onto CMOS ROICs, removing the hybridization bottleneck that has historically blocked cost-competitive IR detector manufacturing. This is the single most commercially mature emerging direction in the dataset. Track related IP activity via PatSnap customer case studies.
Allegro 2026 US · SWIR Vision 2023–2025III-V Colloidal QD Photodiodes as Pb/Hg-Free Alternatives
Imec (Belgium) published on In(As,P) CQD photodiodes reaching 1,400 nm — targeting EU RoHS-compliant SWIR image sensors without restricted elements. University of Toronto demonstrated sub-nanosecond response in InAs CQD photodiodes through amphoteric ligand coordination, addressing the historically slow response of CQD IR devices. Monitor regulatory developments at European Environment Agency.
Imec In(As,P) · 1,400 nm · RoHS-compliantMultispectral and Dual-Band QD Array Architectures
Emberion's 2023 EP filing integrates long-wave infrared pyroelectric detection with shorter-wavelength QD sensing on a single substrate. Italian literature described an optically controlled dual-band QDIP switchable between 5.85 µm and 8.98 µm bands via external pump laser — a reconfigurable detector concept with surveillance and spectroscopy implications.
5.85 µm / 8.98 µm switchable dual-bandSelf-Powered and Wireless QD Radiation Detectors
Philips' 2023 EP patent combines a QD radiation sensor with an on-board photovoltaic power supply and wireless communication layer — a battery-free dosimetry module targeting medical and industrial radiation monitoring. A porous silicon QD layer converts radiation into electrical signals; the photovoltaic layer powers the acquisition electronics. Learn about IP in the life sciences sector.
Philips EP 2023 · battery-free dosimetryPerovskite QD Hybrid Photodetectors
Literature from 2022 reports ZnO QD/(PEA)₂PbI₄ nanosheet hybrid detectors fabricated under atmospheric conditions, and perovskite QD embedded phototransistors with wavelength-tunable response. These represent lower-maturity but rapidly evolving alternatives to lead chalcogenide CQDs. Academic research activity from institutions including Hisense Visual Technology Co., Ltd. signals commercial interest. Monitor global patent filings via EPO patent search and WIPO PATENTSCOPE.
ZnO QD/(PEA)₂PbI₄ · atmospheric fabrication · 2022Quantum Dot Photodetector Arrays — key questions answered
Quantum dot photodetector arrays exploit quantum confinement to engineer the bandgap of semiconductor nanocrystals, enabling spectral absorption tuning across a wide range simply by varying particle size. Three broad material classes are prominent: lead chalcogenide colloidal quantum dots (PbS, PbSe, PbTe) spanning visible to mid-infrared; self-assembled epitaxial quantum dots (InAs/GaAs, InAs/InP, Ge/SiGe) grown by molecular beam epitaxy for intersubband IR detection; and emerging hybrid systems combining colloidal QDs with 2D materials (graphene, MoS₂, WS₂) or fullerenes for enhanced charge transport.
CQD-on-CMOS integration involves depositing colloidal quantum dot photodetector layers directly onto CMOS readout integrated circuits at wafer scale, bypassing the costly bump-bonding hybridization used for InGaAs and HgCdTe focal plane arrays. This approach is explicitly targeted at nanosecond-scale pulsed laser detection for LIDAR and time-of-flight depth sensing, and is the single most commercially mature emerging direction in the dataset.
Among the patent records retrieved, 5 distinct assignee organizations account for the majority of active patents: University of Massachusetts (5 active, plasmonic QDIP FPA enhancement), Emberion Oy (3 active, CQD phototransistor arrays), Allegro MicroSystems LLC (2 active, CQD-on-CMOS LIDAR/ToF), SWIR Vision Systems Inc. (2 active, high-speed CQD depth sensing), and Koninklijke Philips N.V. (1 active, radiation detection).
Published results in this dataset report responsivities up to approximately 1,400 A/W and detectivities reaching 10¹² Jones at room temperature at 1.8 µm for hybrid PbS CQD combined with transition metal dichalcogenide (TMDC) photodetectors.
Based on the most recent filings and publications (2022–2026), five directional signals are evident: CQD-on-CMOS wafer-scale integration for LIDAR; III-V colloidal QD photodiodes as Pb/Hg-free alternatives (Imec's In(As,P) work reaching 1,400 nm); multispectral and dual-band QD array architectures; self-powered and wireless QD radiation detectors (Philips 2023 EP); and perovskite QD hybrid photodetectors fabricated under atmospheric conditions.
The University of Massachusetts plasmonic QDIP portfolio creates a freedom-to-operate constraint for epitaxial QDIP FPA developers. The five-patent US family covering backside plasmonic nanohole arrays for focal plane arrays remains active; any product team developing intersubband QD FPAs with optical enhancement structures should conduct a thorough FTO analysis against this family.
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References
- A quantum dot photodetector apparatus and associated methods — Nokia Technologies Oy, 2019, EP
- Multispectral photodetector array — Emberion Oy, 2023, EP
- A quantum dot photodetector apparatus and associated methods — Emberion Oy, 2021, EP
- A quantum dot photodetector apparatus and associated methods — Emberion Oy, 2019, EP
- Backside Configured Surface Plasmonic Structure for Infrared Photodetector and Imaging Focal Plane Array Enhancement — University of Massachusetts, 2014, US
- Backside Configured Surface Plasmonic Structure for Infrared Photodetector and Imaging Focal Plane Array Enhancement — University of Massachusetts, 2018, US
- Backside configured surface plasmonic structure for infrared photodetector and imaging focal plane array enhancement — University of Massachusetts, 2020, US
- IR photodetectors with high detectivity at low drive voltage — University of Florida Research Foundation, Inc., 2019, EP
- Quantum dot-fullerene junction based photodetectors — Research Triangle Institute, International, 2018, EP
- Detector having quantum dot pn junction photodiode — Allegro MicroSystems, LLC, 2023, US
- Detector having quantum dot pn junction photodiode — Allegro MicroSystems, LLC, 2026, US
- Optical depth sensing systems using high speed colloidal quantum dot photodetectors — SWIR Vision Systems Inc., 2025, US
- Optical depth sensing systems using high speed colloidal quantum dot photodetectors — SWIR Vision Systems Inc., 2023, WO
- Quantum dot radiation detector module with self-sustaining power — Koninklijke Philips N.V., 2023, EP
- Colloidal III–V Quantum Dot Photodiodes for Short-Wave Infrared Photodetection — Imec vzw, 2022
- Sub-nanosecond Infrared Photodetection using III-V Colloidal Quantum Dots — University of Toronto, 2020
- High Sensitivity Hybrid PbS CQD-TMDC Photodetectors up to 2 µm — ICFO, Barcelona, 2019
- Fast and Efficient Photodetection in Nanoscale Quantum-Dot Junctions — Delft University of Technology, 2012
- Uncooled Mid-wave Infrared Focal Plane Array Using Band Gap Engineered Mercury Cadmium Telluride Quantum Dot Coated Silicon ROIC — Indian Institute of Science, 2019
- Optically controlled dual-band quantum dot infrared photodetector — University of Milano-Bicocca, 2022
- High Performance 0D ZnO Quantum Dot/2D (PEA)2PbI4 Nanosheet Hybrid Photodetectors — Hisense Visual Technology Co., Ltd., 2022
- WIPO PATENTSCOPE — World Intellectual Property Organization
- European Patent Office (EPO) — Patent Search and Analytics
- European Environment Agency — RoHS and Restricted Substances Regulation
All data and statistics on this page are sourced from the references above and from PatSnap's proprietary innovation intelligence platform. This landscape is derived from a limited set of patent and literature records retrieved across targeted searches and represents a snapshot of innovation signals within this dataset only.
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