Articles tagged with Heterojunctions
Researchers create ML heterojunctions with lanthanide codoping, achieving 2-fold increased ML intensities and exploring down-conversion mechanisms. The study paves the way for advanced ML materials with broader pressure ranges, enhanced sensitivity, and faster response times.
A team led by Junichi Shiogai successfully observes the superconducting diode effect in an Fe(Se,Te)/FeTe heterostructure, exhibiting rectification under various temperature and magnetic fields. This breakthrough paves the way for ultra-low energy electronics built from superconductors.
Researchers from Lehigh University have developed a material that promises over 190% quantum efficiency in solar cells, exceeding the theoretical limit for silicon-based materials. The material's 'intermediate band states' enable efficient absorption of sunlight and production of charge carriers.
Researchers at City University of Hong Kong developed mixed-dimensional anti-ambipolar transistors for multifunctional electronics, enabling higher information density and lower power consumption. The new technology paves the way for simplified chip circuit design and versatile applications in digital and analog signal processing.
A team of researchers from Tokyo University of Science employed a new 'transmetallation' technique to synthesize lateral heterojunctions of 2D coordination nanosheets. The method enables the creation of ultrathin electronic devices with unique properties, paving the way for innovative devices.
Scientists have demonstrated techniques to fabricate layered semiconductors with suitable bandgap and band structure, offering a new class of materials in photoelectronic applications. Heterogeneous integration of TMDs and traditional semiconductors enables the exploration of next-generation electronic and optoelectronic devices.
Researchers at Kyoto University have successfully created silicon-based photovoltaics at room temperature using a hybrid PEDOT:PSS/silicon heterojunction. This breakthrough technology offers improved production speed and cost, with power generation efficiency above 10%. The new process has the potential to facilitate large-scale diffus...
Researchers from City University of Hong Kong developed a novel device-engineering strategy to suppress energy conversion loss in organic photovoltaics, achieving PCE over 19%. The discovery enables OPVs to maximize photocurrent and overcome the limit of maximum achievable efficiency.
Researchers created a protective coating of glass, gallium-oxide to reduce vibrations in graphene devices. The oxide improves device performance and provides a new method of protection.
Researchers created a new type of solar cell using phase heterojunctions, which significantly improves efficiency compared to traditional single-phase perovskites. The top layer influences performance by passivating defects and creating an advantageous energetic alignment.
The study observes electric gate-controlled exchange-bias effect in van der Waals heterostructures, enabling scalable energy-efficient spin-orbit logic. The team successfully tunes the blocking temperature of the EB effect via an electric gate, allowing for the EB field to be turned 'ON' and 'OFF'.
A recent study found that perovskite-on-silicon solar PV modules have 6-18% less environmental impact than traditional silicon modules over their 25-year lifetime. The tandem technology's higher power conversion efficiency compensates for its additional material and production costs.
A KAUST-led team developed organic semiconductor-based photocatalysts to store solar energy as clean hydrogen fuel. These catalysts can absorb visible light and generate long-lived charges, improving efficiency for hydrogen evolution.
Researchers at KAUST developed a multilayered perovskite-based film that shields high-performance solar cells from extreme heat and moisture while boosting their long-term stability. The 2D perovskite capping layer improves the resistance of unsealed devices against thermal stress and moisture.
Researchers have successfully combined perovskite with silicon in a tandem cell, achieving an efficiency of 21.3%. The team estimates the PCE to be 29.5%, with potential for further improvement through surface optimization.
A novel engineered tunneling layer with enhanced impact ionization improves detection capabilities in graphene/insulator/silicon heterostructure photodetectors. The technique achieves a champion responsivity of ~1.03 AW-1 at a reverse bias of -10 V, showing great potential applications in sensing and communications.
Researchers used conductive atomic force microscopy to detect tiny channels for dark currents in solar cell surfaces, revealing the loss mechanism at the interface of silicon heterojunction solar cells. The study showed that these channels are caused by disorder in the a-Si:H layer and lead to trap-assisted quantum mechanical tunnelling.
Scientists have developed a method to balance the charge in optoelectronic devices using selective electrostatic doping of 2D materials. The technique, which involves controlling the voltage in a precise manner, enables the creation of powerful energy devices with improved characteristics.
Researchers have developed a graphene-organic heterojunction transistor that can modulate photocurrent speed, magnitude, and direction using light. The device utilizes the effective exciton thickness limitation of an intermediate organic transport layer to achieve logic reversal under optical modulation.
Researchers developed a black phosphorus transistor with 10-times lower switching power consumption and 10,000-times lower standby power consumption than conventional CMOS transistors. The transistor achieves record-low subthreshold swing values and high on-state current, paving the way to extend Moore's Law.
A new black phosphorus transistor has been developed that shows 10-times lower switching power consumption and 10,000-times lower standby power consumption than conventional transistors. The transistor can replace CMOS transistors with fast and low-power operations.
Scientists at Nagoya Institute of Technology create new test method using UV light to evaluate interface properties of metal and semiconductors. They found that photo-excited electrons can get trapped at the interface, causing behavioral shifts in device performance.
The article discusses the importance of designing heterojunctions using 2D-materials, which have super clean surfaces and van der Waals coupling. The review highlights various factors influencing CVD fabrication, including temperature, substrate, precursor, lattice mismatch, carrier gas flow rate, and carrier gas composition.
KAUST researchers have created a new method for producing solar cells using lateral p-n heterojunctions, which achieve greater power conversion efficiency than traditional methods. This breakthrough simplifies the production process and enables cheaper solar tracking systems to become redundant.
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.
Karlsruhe researchers created a new piggyback structure for metal-organic frameworks that enables photon upconversion, transforming low-energy photons into high-energy photons. This process has potential applications in solar cells and LEDs, increasing efficiency and reducing limitations.
A new monolithic tandem solar cell has been developed, combining perovskite and silicon materials to achieve an efficiency of 18%, nearly 20% higher than individual cells. The device's design includes a protective layer and a textured wafer, which could further increase efficiency up to 30%.
A recent study at Purdue University contradicts a fundamental assumption about organic solar cells, pointing towards a potential path to create inexpensive solar technology that can compete with standard silicon cells. The findings suggest that a design change could improve charge separation and increase efficiency.
Researchers at NC State University found that organic solar cell efficiency improves when donor and acceptor molecules are aligned face-on, rather than edge-on. This alignment enables favorable charge transfer interactions, reducing recombination and increasing power generation.
Researchers at Northwestern University have created a p-n heterojunction diode using molybdenum disulfide and carbon nanotubes, allowing for electronically tunable device characteristics. The device has also shown ultrafast photodetection capabilities with a sensitive response to light.
The EPFL team has achieved a record efficiency of 22.4% for photovoltaic cells by combining amorphous and monocristalline silicon in a 'heterojunction' structure. This breakthrough could lead to cheaper and more efficient solar power, with costs estimated at $100 per square meter.
Researchers at NIST developed a surface-directed method for growing nanowires horizontally, producing nano-LEDs with improved properties. The technique enables easy localization of individual heterojunctions on the surface, making it suitable for various applications.
Researchers at University of Illinois have successfully demonstrated room-temperature operation of a light-emitting transistor laser, paving the way for high-speed applications. The breakthrough could lead to faster signal processing, large capacity seamless communications, and improved electrical and optical integrated circuits.