Quantum-Tuned Cascade Multijunction Infrared Photodetector

Article Chemistry, Multidisciplinary

Passivating {100} Facets of PbS Colloidal Quantum Dots via Perovskite Bridges for Sensitive and Stable Infrared Photodiodes

Duo Chen et al.

Summary: This study reports a novel strategy of using perovskite-bridged PbS CQDs to achieve improved passivation and enhanced stability in large-size PbS CQDs, leading to enhanced performance of infrared CQDs photodiodes.

ADVANCED FUNCTIONAL MATERIALS (2023)

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Article Nanoscience & Nanotechnology

Limiting Factors of Detectivity in Near-Infrared Colloidal Quantum Dot Photodetectors

Wei Gong et al.

Summary: This study elucidates that noise current is the predominant factor limiting specific detectivity (D*) in lead sulfide colloidal quantum dot photodetectors. The noise is highly dependent on the trap densities in halide-passivated PbS films and the carriers injected from the Schottky contact. The research findings provide guidance to improve the design of high-performance colloidal quantum dot photodetectors.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Nanoscience & Nanotechnology

Large Photomultiplication by Charge-Self-Trapping for High-Response Quantum Dot Infrared Photodetectors

Kaimin Xu et al.

Summary: PbS colloidal quantum dots (CQDs) show promise as low-cost and high-performance infrared photodetectors. By creating a self-trapped ZnO layer on the surface, significant photomultiplication can be achieved at extremely low bias.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Chemistry, Multidisciplinary

Ligand-Engineered HgTe Colloidal Quantum Dot Solids for Infrared Photodetectors

Ji Yang et al.

Summary: This study reports a ligand-engineered approach to synthesize well-separated HgTe CQDs. By using specific ligands, highly monodisperse HgTe CQDs with a wide size range covering the infrared regions were successfully synthesized, achieving excellent electron mobility and detectivity.

NANO LETTERS (2022)

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Article Multidisciplinary Sciences

Evidence for a single-layer van der Waals multiferroic

Qian Song et al.

Summary: This article reports the discovery of type-II multiferroic order in a single atomic layer of the transition-metal-based van der Waals material NiI2. The multiferroic state of NiI2 is characterized by a proper-screw spin helix that induces chirality-controlled electrical polarization. Through various optical measurements and theoretical simulations, it is found that NiI2 has a highly anisotropic electronic state that breaks both rotational and inversion symmetry, supporting polar order. Interestingly, the ordered magnetic polar state persists down to the monolayer level of NiI2. These findings introduce a new platform for studying emergent multiferroic phenomena, chiral magnetic textures, and ferroelectricity in the realm of two-dimensional van der Waals materials.

NATURE (2022)

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Article Chemistry, Multidisciplinary

Fast Near-Infrared Photodetection Using III-V Colloidal Quantum Dots

Bin Sun et al.

Summary: Colloidal quantum dots (CQDs) have tunable bandgap and solution processing, making them promising materials for infrared (IR) light detection. However, the time response of CQD IR photodiodes is currently inferior to that of Si and InGaAs. The high permittivity of II-VI CQDs leads to slow charge extraction, while III-Vs offer low permittivity and potential for high-speed operation. By managing the surface using amphoteric ligand coordination, the performance of InAs CQD solids is improved, achieving fast response time and high external quantum efficiency.

ADVANCED MATERIALS (2022)

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Article Energy & Fuels

Suppressed recombination loss in organic photovoltaics adopting a planar-mixed heterojunction architecture

Kui Jiang et al.

Summary: Researchers have discovered that using donor and acceptor materials with intrinsically weaker exciton binding strengths in sequentially processed planar-mixed heterojunction devices can alleviate photocurrent loss caused by triplet states and achieve higher power conversion efficiencies.

NATURE ENERGY (2022)

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Article Engineering, Electrical & Electronic

A near-infrared colloidal quantum dot imager with monolithically integrated readout circuitry

Jing Liu et al.

Summary: This study reports high-resolution imagers that integrate near-infrared colloidal quantum dot photodiodes with complementary metal-oxide-semiconductor readout integrated circuits. These imagers have the advantages of high resolution and low cost, and can be used for vein imaging and matter identification.

NATURE ELECTRONICS (2022)

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Article Chemistry, Multidisciplinary

Silicon Surface Passivation for Silicon-Colloidal Quantum Dot Heterojunction Photodetectors

Qiwei Xu et al.

Summary: The study demonstrates the importance of Si surface passivation for the construction of high-performance Si:CQD photodetectors. The two-step passivated Si:CQD interface shows fewer trap states and decreased recombination rates, leading to a higher external quantum efficiency in infrared photodiodes.

ACS NANO (2021)

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Review Materials Science, Multidisciplinary

Solution-processable infrared photodetectors: Materials, device physics and applications

Ning Li et al.

Summary: This paper introduces infrared photon detectors based on solution-processable semiconductors, highlighting their sensitivity and advantages compared to vacuum-processed counterparts. It also discusses the challenges and recent research directions in the development of solution-processable infrared detectors.

MATERIALS SCIENCE & ENGINEERING R-REPORTS (2021)

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Article Multidisciplinary Sciences

Silicon: quantum dot photovoltage triodes

Wen Zhou et al.

Summary: While Silicon is widely used for electronic devices, its band-gap limits its use for infrared detection. Researchers have integrated quantum dots to overcome this limitation, resulting in a photovoltage triode with high sensitivity to infrared radiation.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Ultra-Narrow-Band NIR Photomultiplication Organic Photodetectors Based on Charge Injection Narrowing

Ming Liu et al.

Summary: Ultra-narrow-band NIR organic photodetectors with photomultiplication capabilities were developed by narrowing charge injection using interfacial traps. By incorporating BEH and F(6)TCNNQ into the active layers, high EQE values at 850 nm were achieved with improved rejection ratios.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2021)

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Article Engineering, Electrical & Electronic

Unipolar barrier photodetectors based on van der Waals heterostructures

Yunfeng Chen et al.

Summary: Band-engineered van der Waals heterostructures are able to construct high room-temperature detectivity detectors for visible light and blackbody infrared light by blocking dark current without suppressing photocurrent. Utilizing two-dimensional materials with self-passivated surfaces and tunable band structures, unipolar barriers can be designed to avoid lattice mismatch and interface defects, achieving low dark current and high detectivity in photodetectors.

NATURE ELECTRONICS (2021)

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Article Materials Science, Multidisciplinary

Colloidal quantum dot photodetectors with 10-ns response time and 80% quantum efficiency at 1,550 nm

Maral Vafaie et al.

Summary: Efficient ligand exchange route enables large-diameter CQDs to achieve high-efficiency passivation and charge transport, leading to CQD solids with external quantum efficiency greater than 80% at 1,550 nm. This technology has the potential to replace conventional III-V semiconductors and make significant advancements in the field of infrared photodetection.

MATTER (2021)

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Article Chemistry, Physical

Sulfur-Infused Hole Transport Materials to Overcome Performance-Limiting Transport in Colloidal Quantum Dot Solar Cells

Arlene Chiu et al.

ACS ENERGY LETTERS (2020)

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Review Chemistry, Multidisciplinary

Integrated Structure and Device Engineering for High Performance and Scalable Quantum Dot Infrared Photodetectors

Kaimin Xu et al.

SMALL (2020)

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Article Engineering, Electrical & Electronic

Solution-processed upconversion photodetectors based on quantum dots

Wenjia Zhou et al.

NATURE ELECTRONICS (2020)

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Article Optics

Dual-band infrared imaging using stacked colloidal quantum dot photodiodes

Xin Tang et al.

NATURE PHOTONICS (2019)

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Review Chemistry, Multidisciplinary

2D Metal Chalcogenides for IR Photodetection

Fakun Wang et al.

SMALL (2019)

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Review Optics

Recent Progress on Photomultiplication Type Organic Photodetectors

Jianli Miao et al.

LASER & PHOTONICS REVIEWS (2019)

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Article Nanoscience & Nanotechnology

High-efficiency colloidal quantum dot infrared light-emitting diodes via engineering at the supra-nanocrystalline level

Santanu Pradhan et al.

NATURE NANOTECHNOLOGY (2019)

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Article Chemistry, Multidisciplinary

A Facet-Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics

Younghoon Kim et al.

ADVANCED MATERIALS (2019)

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Article Chemistry, Multidisciplinary

Hybrid Organic/PbS Quantum Dot Bilayer Photodetector with Low Dark Current and High Detectivity

Yuanzhi Wei et al.

ADVANCED FUNCTIONAL MATERIALS (2018)

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Article Chemistry, Multidisciplinary

Highly Efficient Inverted Structural Quantum Dot Solar Cells

Ruili Wang et al.

ADVANCED MATERIALS (2018)

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Article Materials Science, Multidisciplinary

Ambipolar Graphene-Quantum Dot Phototransistors with CMOS Compatibility

Li Zheng et al.

ADVANCED OPTICAL MATERIALS (2018)

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Article Multidisciplinary Sciences

Photovoltage field-effect transistors

Valerio Adinolfi et al.

NATURE (2017)

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Review Nanoscience & Nanotechnology

Solution-processed semiconductors for next-generation photodetectors

F. Pelayo Garcia de Arquer et al.

NATURE REVIEWS MATERIALS (2017)

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Article Physics, Applied

Noise performance of PbS colloidal quantum dot photodetectors

A. De Iacovo et al.

APPLIED PHYSICS LETTERS (2017)

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Article Chemistry, Multidisciplinary

Plasmonic Silicon Quantum Dots Enabled High-Sensitivity Ultrabroadband Photodetection of Graphene-Based Hybrid Phototransistors

Zhenyi Ni et al.

ACS NANO (2017)

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Article Chemistry, Physical

Tunable, Bright, and Narrow-Band Luminescence from Colloidal Indium Phosphide Quantum Dots

Parthiban Ramasamy et al.

CHEMISTRY OF MATERIALS (2017)

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Article Optics

High-gain infrared-to-visible upconversion light-emitting phototransistors

Hyeonggeun Yu et al.

NATURE PHOTONICS (2016)

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Article Multidisciplinary Sciences

Integrating an electrically active colloidal quantum dot photodiode with a graphene phototransistor

Ivan Nikitskiy et al.

NATURE COMMUNICATIONS (2016)

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Article Chemistry, Multidisciplinary

Unraveling the Gain Mechanism in High Performance Solution-Processed PbS Infrared PIN Photodiodes

Jae Woong Lee et al.

ADVANCED FUNCTIONAL MATERIALS (2015)

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Article Chemistry, Multidisciplinary

Resolving Weak Light of Sub-picowatt per Square Centimeter by Hybrid Perovskite Photodetectors Enabled by Noise Reduction

Yanjun Fang et al.

ADVANCED MATERIALS (2015)

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Article Chemistry, Multidisciplinary

Energy Level Modification in Lead Sulfide Quantum Dot Thin Films through Ligand Exchange

Patrick R. Brown et al.

ACS NANO (2014)

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Article Nanoscience & Nanotechnology

Surface Patterning of Mesoporous Niobium Oxide Films for Solar Energy Conversion

Myoung-Ryul Ok et al.

ACS APPLIED MATERIALS & INTERFACES (2013)

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Article Optics

CMOS-compatible graphene photodetector covering all optical communication bands

Andreas Pospischil et al.

NATURE PHOTONICS (2013)

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Article Chemistry, Multidisciplinary

Hybrid Organic/Inorganic Optical Up-Converter for Pixel-Less Near-Infrared Imaging

Jun Chen et al.

ADVANCED MATERIALS (2012)

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Article Nanoscience & Nanotechnology

A nanocomposite ultraviolet photodetector based on interfacial trap-controlled charge injection

Fawen Guo et al.

NATURE NANOTECHNOLOGY (2012)

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Article Nanoscience & Nanotechnology

Hybrid graphene-quantum dot phototransistors with ultrahigh gain

Gerasimos Konstantatos et al.

NATURE NANOTECHNOLOGY (2012)

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Article Chemistry, Multidisciplinary

Near-Infrared Inorganic/Organic Optical Upconverter with an External Power Efficiency of >100%

Jun Chen et al.

ADVANCED MATERIALS (2010)

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Review Nanoscience & Nanotechnology

Nanostructured materials for photon detection

Gerasimos Konstantatos et al.

NATURE NANOTECHNOLOGY (2010)

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Review Physics, Applied

Third-generation infrared photodetector arrays

A. Rogalski et al.

JOURNAL OF APPLIED PHYSICS (2009)

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Article Multidisciplinary Sciences

Ultrasensitive solution-cast quantum dot photodetectors

Gerasimos Konstantatos et al.

NATURE (2006)

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Article Chemistry, Multidisciplinary

Colloidal PbS nanocrystals with size-tunable near-infrared emission: Observation of post-synthesis self-narrowing of the particle size distribution

MA Hines et al.

ADVANCED MATERIALS (2003)

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Article Materials Science, Multidisciplinary

Modelling polycrystalline semiconductor solar cells

M Burgelman et al.

THIN SOLID FILMS (2000)

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Quantum-Tuned Cascade Multijunction Infrared Photodetector

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