Articles tagged with Photodetectors
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A new surface tension-controlled crystallization method has been developed to prepare large 2D perovskite single crystals, achieving exceptional device performance. The crystals exhibit anisotropy-dependent optoelectronic properties, with high responsivity and external quantum efficiency.
Researchers create high-performance organic phototransistors using a novel hybrid-layered architecture that combines charge-trapping effect and efficient carrier transport, enabling enhanced photodetection performance. The devices show excellent flexibility and reliability in photosensitive imaging systems.
Scientists have developed a new material for ultraviolet photodetectors that can detect UV radiation at speeds 100 times faster than existing devices. The new stretchable film uses a unique interlaced-nanowire structure to achieve high response speed and electrical stability.
A new method for measuring semiconductor material quality has been developed, enabling the characterization of materials at scales much smaller than current technologies. This will accelerate the discovery and investigation of 2D, micro- and nanoscale materials.
Researchers at ICFO have developed an infrared detector using Bismuth Sulphide flakes with sulphur vacancies, creating extended in-gap states for sub-bandgap absorption. The resulting device has high gain, low noise, and sensitivity, enabling fast response times and broad spectral coverage.
A new method developed by Northwestern Engineering's Manijeh Razeghi has greatly reduced image distortion caused by spectral cross-talk in dual-band photodetectors. This work enables high spectral-contrast infrared imaging devices for various applications, including medicine and security.
Researchers have developed inorganic perovskite-based photodetectors that transfer both text and music, offering a promising material for future rapid optical communication. The new materials have rapid response times, are simple to manufacture, and are extremely stable.
Researchers at Argonne National Laboratory developed nanoparticle coatings that increase the sensitivity of photodetectors to UV radiation, enabling the detection of rare events and potential insights into neutrino oscillations. These enhanced detectors could also be used to enhance visible light in dim environments.
Researchers have developed a CdS-CdSxTe1-x-CdTe core-shell nanobelt photodetector with high sensitivity and fast speed, outperforming traditional nanostructures. The detector has a responsivity of 1520 A/W and a detection spectrum covering the entire visible range.
Researchers develop solar-blind UV photodetector with high responsivity and low dark current, enabling detection of deep ultraviolet emission. The joint work showcases the possibility of manufacturing new-generation photodetectors using existing silicon technologies.
The Compact Thermal Imager (CTI) will measure fires, ice sheets, glaciers, and snow surface temperatures while also tracking water transfer from soil and plants into the atmosphere. The CTI's enabling technology, Strained-Layer Superlattice Technology, is 10 times more sensitive than its predecessor and operates at warmer temperatures.
Researchers from Russia and India have developed a narrow-band UV photodetector based on indium oxide nanocrystals embedded in aluminum oxide. The device shows record values of responsivity and external quantum efficiency, making it suitable for applications such as fluorescence detection and UV phototherapy.
The new photodetector designed by UCLA has major improvements in speed, sensitivity and spectrum range, making it suitable for a wider range of applications including thermal imaging, environmental sensing and medical diagnosis.
KAUST researchers create triboelectric nanogenerators that capture mechanical energy from human movements and convert it into electricity. They also engineer a wearable self-powered bracelet that can store converted energy for operating electronic devices.
A team of engineers from the University of Wisconsin-Madison and the University at Buffalo has developed a powerful new photodetector that combines unique fabrication methods and light-trapping structures. The device increases light absorption in thin materials, enabling smaller optoelectronic devices with improved performance.
Researchers at UC Davis and W&WSens Devices, Inc. developed a new type of photodetector that uses tapered holes to divert photons sideways, preserving the speed of thin-layer silicon and efficiency of thicker layers. The device can convert data from optical to electronics at 20 gigabytes per second, outperforming existing technology.
Researchers from Northwestern University developed a new approach to improve night-vision cameras using strained-layer indium arsenide/indium arsenide antimonide type-II superlattices. The new design enables infrared cameras to perform imaging at higher temperatures, reducing the need for cryogenic cooling power.
A novel, sensitive and stable photodetector has been created based on a semiconducting junction called GdNiO3/Nb-doped SrTiO3. The device eliminates the need for an external power source, allowing for efficient separation of photo-generated carriers.
Researchers at DGIST have successfully developed a graphene microwave photodetector that can detect 100,000 times smaller light energy than existing detectors. The device achieved this by creating a clean electronic system, allowing electrons to move far distances without residues or dispersion.
Scientists at MIPT have found that treating photodetectors with UV light can turn them into high-bandwidth devices, making them suitable for a wide range of applications. The process is quick, cheap, and efficient, and the acquired properties remain unchanged after manufacturing.
Researchers at KIT have created a novel type of photodetector that can transmit information at speeds of up to 40 gigabits per second, using surface plasmon polaritons to combine optics and electronics on a tiny space. The smallest photodetectors worldwide for optical data transmission can be used for integrated optical circuits.
Researchers at ICFO developed a hybrid photodetector that surpasses existing performance features, operating in visible, NIR, and SWIR ranges. The device integrates an active colloidal quantum dot photodiode with a graphene phototransistor, enabling high quantum efficiency and fast photoresponse.
A team at Northwestern University has created a device that can detect different infrared wavebands by varying the applied bias voltage. The breakthrough could enable applications such as three-color infrared imaging and infrared color televisions.
A new approach to modifying 2D materials has led to an enhancement in the light absorption and stretchability of atomically thin materials. By engineering the two-dimensional material into three-dimensional crumpled structures, researchers achieved more than an order-of-magnitude enhancement in photoresponsivity.
Scientists at the University of California, Riverside have created a way to observe electrons cooling off in just 30 quadrillionths of a second. This breakthrough could lead to more efficient devices for visual displays, solar cells, and optical communications.
A team of Cornell engineers developed an atomically thin photodetector that responds to light in near-instantaneous electrical current. The device achieved intrinsic response times as short as 3 picoseconds, surpassing current technology.
Researchers have successfully created a new class of uncooled photodetectors that can operate at room temperature, overcoming limitations of existing inorganic detectors. These breakthrough devices will enable various industrial and scientific applications such as optical communications and chemical sensing.
Researchers at Toyohashi University of Technology developed back-gated field-effect phototransistors made of MoSe2 crystals. The devices exhibited excellent performance, with a measured photoresponsivity of 97.1 AW-1 and a theoretical external quantum efficiency 280-fold higher than commercial Si and InGaAs photodiodes.
Rice University researchers have created a CMOS-compatible, biomimetic color photodetector that directly responds to red, green and blue light. The device uses an aluminum grating that can be added to silicon photodetectors with the mainstay technology, "complementary metal-oxide semiconductor," or CMOS.
A new type of infrared photodetector has been proposed, featuring a nanoporous ZnO/n-Si structure that exhibits a double peak in transient photovoltage decay under near-infrared pulsed light irradiation. The device's photoresponse is highly sensitive to slight changes in laser pulse energy.
The development of UV photodetectors has been driven by numerous applications in the defense, commercial, and scientific arenas. The researchers have brought this AlxGa1-xN-based device closer to reality by developing a compact photodetector with the world's highest quantum efficiency.
Researchers have developed large area picosecond photodetectors that can measure particle speed with sub-picosecond resolution and spatial precision measured in micrometers. The detectors use Atomic Layer Deposition technique and have potential applications in high-energy physics, medical imaging, and homeland security.
Gold nanoparticles have been applied to MoS2 photodetectors, increasing their efficiency by a factor of three. The researchers attribute the improvement to plasmon oscillations in individual nanoparticles, which enhance the local optical field.
Researchers at Rice University have developed a nanotube-based photodetector that can detect light across the visible and infrared spectrum. The device, made from extra-long carbon nanotubes, promises to make possible new optoelectronic devices, solar cells, and specialized cameras.
Arizona State University researchers have made a significant advance in infrared photodetector technology by discovering how to effectively use certain materials arranged in specific patterns in atomic-scale structures. The development of superlattices with tailored detection wavelengths has improved the sensitivity and efficiency of i...
Scientists have created a graphene-based ultra-fast photodetector that can detect pulses as short as a few picoseconds. The device also generates terahertz radiation, which has properties of both particle and electromagnetic waves. This breakthrough could lead to advancements in material testing and medical treatments.
Physicist Mayly Sanchez is working on developing photodetectors for a proposed neutrino water Cherenkov detector, aiming to improve physics capabilities and detect neutrinos more efficiently. The goal is to contribute to the $900 million Long Baseline Neutrino Experiment.
Researchers at TUM developed a new method to measure photocurrent in nanoscale photodetectors with picosecond precision, enabling faster detection of electrons. This breakthrough has significant implications for the development of optoelectronic components such as nanoscale photodetectors and solar cells.
A team of Arizona State University researchers will collaborate with colleagues from top universities to develop next-generation lasers and infrared photodetectors. They aim to improve the physical and structural properties of antimonide-based compound semiconductor materials, enabling high-performance sensing and imaging devices.
Researchers at Rensselaer Polytechnic Institute have developed a nanotechnology-based 'microlens' that enhances infrared imaging signal without increasing noise. The gold-covered lens-less structure doubles the detectivity of a quantum dot-based infrared detector and has the potential to boost it by up to 20 times.
Researchers control light at nanoscale by adopting tuning concepts from radio-frequency technology, enabling targeted design of biosensors and photodetectors. The discovery bridges the gap between optical and radio frequencies, opening doors for compact and integrated nanophotonic devices.
Researchers have developed a flexible light-sensitive material that can revolutionize photography and other imaging technologies by eliminating image distortion. Inspired by the human eye, the curved photodetector can correct distortion and produce sharper images.
Researchers at UC-San Diego have discovered that nanowire photodetectors can achieve single-photon sensitivity, making them highly sensitive to light detection. The unique geometry of nanowires traps holes, increasing the time electrons travel down the wire and triggering an increase in current.
A new radiation detector based on optical fibers has been developed to detect illicit plutonium. The device is light, flexible, and can be used in various applications, including airport security and medical treatments for brain tumors.
A team of scientists has developed a superconducting device capable of detecting infrared light at previously off-limits wavelengths, offering remarkable speed and sensitivity. The device, known as a hot-electron photodetector, can recognize changes in light signals as fast as 25 billion times each second.
Physicists at Stanford University developed a new optical detector capable of measuring individual photons' energy, arrival time, and location throughout the spectrum. This breakthrough has potential applications in dark matter detection and improved astronomical observations.
Sandia Labs is working on chemical sensing technology to quickly detect and classify explosive molecules, which can identify land mines. The project aims to provide a more accurate and efficient method for demining, reducing the risk of casualties and environmental damage.