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الوسم: laser

  • Innovative Paste-and-Laser Technique Boosts Solar Cell Efficiency to 26.31%

    Innovative Paste-and-Laser Technique Boosts Solar Cell Efficiency to 26.31%

    Scientists have developed a novel manufacturing process that enables the production of high-efficiency solar panels with increased power output without significantly raising manufacturing complexity or costs.

    This innovative approach combines a specially formulated silver paste with laser treatment to enhance a type of solar cell called a tunnel oxide passivated contact (TOPCon) cell. The improved device achieved a certified power conversion efficiency of 26.31%, ranking it among the top-performing TOPCon solar cells to date.

    The project was led by Professor Ye Jichun’s team at the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences. Collaborating with researchers and industry partners from Soochow University, Zhejiang Gonda Electronic Technology, and JA Solar Technology, the team published their findings in the journal Matter.

    Crystalline silicon solar cells are currently the leading technology in the solar industry, with TOPCon technology gaining popularity because it is compatible with existing manufacturing equipment and processes used for traditional silicon cells. However, creating metal electrical contacts on TOPCon cells presents a significant challenge.

    Typically, manufacturers print a silver-aluminum paste onto the cell and then heat it to ensure a good electrical connection for current flow. This process, however, can harm the cell’s sensitive surface layers, which are crucial for minimizing energy loss. Additionally, the heat causes the metal lines to widen, casting more shadow and reducing the sunlight reaching the active area.

    The researchers addressed these issues by developing a new approach. They first created an aluminum-free silver paste that maintains its shape after printing, allowing for taller and narrower metal lines. These gridlines have an aspect ratio of 55%, balancing electrical conductivity with minimal shading to maximize sunlight absorption.

    Next, they integrated the paste with a technique called laser-enhanced contact optimization (LECO). This involves scanning a laser along the metal gridlines while applying an electrical voltage, producing highly localized heating. This process establishes solid electrical contacts at specific points while minimizing heat exposure elsewhere.

    By concentrating heat only where needed, the method reduces damage to the solar cell’s protective surface layers compared to traditional high-temperature techniques. The combined process yielded impressive results: the completed TOPCon cells achieved a certified efficiency of 26.31% and a high short-circuit current density of 41.98 mA/cm², the highest recorded for large-area TOPCon cells.

    This advancement holds significant promise for the solar industry. It offers a way to obtain reliable electrical contacts without compromising the cell’s protective features. Furthermore, the method is designed to be scalable, providing a practical pathway for manufacturing more efficient commercial solar panels and increasing electricity production from the same amount of sunlight.

  • Laser Chips Promise Faster Greener Indoor Wireless

    Laser Chips Promise Faster Greener Indoor Wireless

    Indoor wireless connectivity is reaching its physical limits as more devices congest the same frequency band. Streaming, video conferencing, and smart home devices are placing greater demands on networks, while power consumption continues to increase. A new type of laser chip offers an alternative by transmitting data via light.

    Researchers have developed a compact optical link capable of providing ultra-fast indoor connections with reduced energy consumption. Instead of broadcasting signals in all directions, it directs data through controlled infrared beams, increasing available capacity and minimizing interference in densely populated environments.

    At the heart of this system is a chip featuring 25 tiny lasers, each transmitting its own data stream. Operating simultaneously, these lasers significantly boost data throughput compared to a single source. Experimental tests over a two-meter distance showed individual lasers delivering between 13 and 19 gigabits per second, with the combined system reaching an impressive 362.7 gigabits per second—among the quickest results for chip-scale optical links so far.

    The performance improvement isn’t solely about speed; power efficiency also sees a notable boost, providing a more sustainable way to manage growing data needs.

    Performance is driven by a 5-by-5 array of vertical-cavity surface-emitting lasers, each functioning as a high-speed communication channel.

    Each laser’s beam is shaped into a specific square pattern, which limits overlap and allows multiple links to operate side by side without interference. The system’s receiver hardware restricts the speed limits, suggesting that future enhancements in hardware could push these speeds even higher.

    Light offers advantages over radio signals in crowded indoor spaces where interference and bandwidth limitations are common. Instead of scattering signals everywhere, the system creates a grid of precisely targeted beams with minimal spillover, ensuring stable coverage across the area—even when multiple devices are connected simultaneously.

    This approach operates at a power level of about 1.4 nanojoules per bit—roughly half the energy used by comparable Wi-Fi setups. However, it is currently optimized for short-range use with a clear line of sight, which limits its distance capabilities.

    Looking ahead, this technology aims to work alongside existing wireless networks by handling high-traffic situations indoors. The hardware is fabricated on a tiny chip using standard manufacturing techniques, making integration into existing fixtures or access points feasible, though commercial availability remains in the future.

    As network demands continue to grow, combining traditional radio links with laser-based systems could become a standard solution, with light-based technology managing the most data-intensive tasks.

  • How to Get the Marni Laser Helm in Crimson Desert by Completing & Solving

    How to Get the Marni Laser Helm in Crimson Desert by Completing & Solving

    There are many interesting and unusual weapons and armor in Crimson Desert. From a sword that sends out tracking energy orbs to a fan that creates large tornadoes to attack enemies, there’s plenty to discover while exploring the expansive open world of the game.

    One of the coolest armor pieces is the Marni Laser Helm, which does exactly what its name suggests. However, obtaining this helm isn’t as simple as grabbing some regular items. Here’s where to find the Marni Laser Helm and how to get it if you’re not yet strong enough for this part of the game.

    Marni Laser Helm Location

    To find this piece of armor, head to the far eastern part of Delesyia and then move to the southeastern area. Specifically, look for Marni’s Masterium, a large fortress located on the coast on a cliff, completely surrounded by flying dragons.

    Reaching this spot is challenging. You’ll need to travel across the map, starting from Hernand, making your way through Demeniss, and reaching Delesyia. It’s best to attempt this only after finishing Chapter 5 to ensure you have enough health, defense, and attack power to survive the dangers.

    Demeniss isn’t too tough if you stay on the main roads, but Delesyia is much trickier. The island is full of mechanized dragonflies that shoot laser beams. These enemies can do a lot of damage if your defenses are low, and they will chase you relentlessly.

    When you arrive at Marni’s Masterium, it’s wise to climb up the cliff along the coast to avoid detection by the golem enemies patrolling the area. The fortress is hostile at first, so you’ll want to sneak in quietly to avoid combat and grab the helm. The main threat here is the swarm of fast-moving, mechanized dragonflies, so fight only if necessary and try to stay out of sight of the rest of the base.

    Getting the Helm

    You will find the helm inside a small workshop room, shown in the image above. It’s on a table inside. If you arrive and can’t pick it up, that means enemies are still alert and looking for you. In that case, hide and wait or eliminate the enemies quietly.

    There’s a large golem in the courtyard that can deal massive damage, so try to enter the workshop through the missing roof to avoid detection.

    Once you successfully grab the helm, pick it up and either continue your mission or leave the base. To use the helm, equip it like any other helmet first. Then, press right on your D-Pad to select it in the radial menu. You can activate its powers by pressing both the Left and Right triggers. When activated, you’ll briefly lock onto multiple enemies, and boxes will appear around them. After targeting, fire a barrage of explosive lasers at all locked enemies to deal damage. Remember, the helm has a cooldown—you’re only able to use this laser attack once every minute.

  • Is inkjet or laser better for color printing?

    Is inkjet or laser better for color printing?

    When it comes to color printing, choosing the right type of printer can greatly affect the quality and cost of your prints. Inkjet and laser printers each have distinct advantages and disadvantages, making them suitable for different needs and environments. Let’s delve into the characteristics of both to help you make an informed decision.

    Understanding Inkjet Printers

    Inkjet printers utilize liquid ink sprayed through tiny nozzles onto paper. They are well-known for producing vibrant colors and detailed images, making them a popular choice for photographers and artists.

    Advantages of Inkjet Printers

    • Superior Color Quality: Inkjet printers excel in color richness and can reproduce a wider color spectrum, offering smoother gradients.

    • Versatility: They can print on a variety of media, including glossy photo paper, textured art paper, and even fabric.

    • Lower Initial Cost: Inkjet printers tend to have a lower purchase price compared to laser printers, making them accessible for home users.

    Disadvantages of Inkjet Printers

    • Slow Printing Speed: Compared to laser printers, inkjets generally have slower printing speeds, especially when printing high-quality color documents.

    • Ink Costs: While the initial investment is lower, ink cartridges can be expensive, especially if you print frequently or in large volumes.

    • Potential for Smudging: Prints may smudge if not handled properly right after printing, especially when using certain types of paper.

    Exploring Laser Printers

    Laser printers use toner and electrostatic charges to transfer images and text onto paper. They are known for their efficiency and speed, making them widely used in offices.

    Advantages of Laser Printers

    • Fast Printing Speed: Laser printers are typically faster in producing large volumes of prints, making them ideal for office environments.

    • Cost-Effectiveness per Page: While the initial cost of a laser printer can be higher, the toner cartridges tend to last longer, resulting in a lower cost per page for high-volume printing.

    • Durability of Prints: Laser prints are less prone to smudging and water damage, making them suitable for documents that are often handled.

    Disadvantages of Laser Printers

    • Limited Color Quality: While color laser printers can produce acceptable color documents, they may not achieve the same level of vibrancy and detail as inkjet printers.

    • Higher Initial Cost: The upfront cost of laser printers is generally higher, which might not be practical for casual users or those with limited budgets.

    • Less Versatility: Most laser printers are optimized for standard printer paper, and fewer can handle specialty media like photo paper.

    Choosing the Right Printer for Color Printing

    Selecting between inkjet and laser printers largely depends on your specific printing needs. Here are some factors to consider:

    Print Volume

    • High Volume: If you print large volumes regularly, a laser printer would be more efficient.

    • Low to Moderate Volume: For occasional or moderate printing, an inkjet printer may suffice.

    Print Quality

    • Photography and Art: Opt for an inkjet printer if you prioritize exceptional color accuracy and detailed imagery.

    • Text and Graphics: If your focus is primarily on documents with some color graphics, a laser printer could meet your needs.

    Budget Considerations

    • Initial Investment: Inkjet printers are usually cheaper initially, while laser printers offer savings over time with lower operating costs.

    • Long-Term Costs: Evaluate the long-term costs of ink versus toner, especially if you plan to print frequently.

    Media Variety

    • Diverse Printing Needs: Choose an inkjet printer if you need to print on various media types.

    • Standard Paper Printing: A laser printer is the best choice for standard paper print jobs.

    By weighing the characteristics, advantages, and disadvantages of inkjet versus laser printers, you can make an informed decision that aligns with your specific printing needs and preferences.

  • What is a good laser color printer?

    What is a good laser color printer?

    Understanding Good Laser Color Printers

    In today’s digital age, the demand for high-quality printed materials remains strong. Whether for home use, office tasks, or creative projects, a good laser color printer can make all the difference. With numerous options available, selecting the right one can seem daunting. This article will help you navigate the essentials of what makes a reliable laser color printer.

    Key Features of a Good Laser Color Printer

    When evaluating a laser color printer, consider the following features that can significantly impact performance:

    Print Quality

    • Resolution: Look for printers with a higher DPI (dots per inch) for clearer and sharper images.

    • Color Accuracy: Choose models known for producing vivid colors and precise shades.

    Speed and Efficiency

    • Pages Per Minute (PPM): A higher PPM means quicker print jobs, which is essential for busy environments.

    • Warm-Up Time: Some printers can start printing more rapidly than others; this is vital for minimizing wait time.

    Cost of Ownership

    • Initial Price: Evaluate your budget. Some printers may be more affordable upfront but may have higher operating costs.

    • Toner Costs: Research the price of replacement cartridges. Some printers offer higher yield options, providing better value in the long run.

    Connectivity Options

    • Wireless Printing: Ensure the printer supports Wi-Fi or Bluetooth for effortless printing from smartphones and tablets.

    • Mobile Apps: Look for models that provide user-friendly apps for managing print jobs remotely.

    Popular Models to Consider

    Here are some reputable laser color printers that excel in various aspects:

    Brother HL-L3270CDW

    • Print Speed: Up to 25 PPM

    • Duplex Printing: Automatic two-sided printing

    • Connectivity: Wi-Fi, USB, NFC printing

    • Ideal For: Small offices or home environments needing versatile and fast printing.

    HP Color LaserJet Pro MFP M281fdw

    • Functionality: 4-in-1 (print, copy, scan, fax)

    • Print Speed: Up to 28 PPM

    • Security Features: Built-in security features to protect sensitive documents

    • Best For: Businesses focusing on multifunction capabilities and speedy output.

    Canon Color imageCLASS MF644Cdw

    • User-Friendly: Intuitive touchscreen interface

    • Print Quality: Excellent color reproduction

    • Automatic Document Feeder (ADF): For scanning multiple pages at once

    • Great For: Users needing quality printouts and advanced features for varied tasks.

    Maintenance and Support

    Staying ahead of potential issues with your laser printer involves considering maintenance and support:

    • Ease of Maintenance: Check if the printer has easily accessible parts for simple maintenance tasks, such as replacing toner.

    • Warranty and Support: Evaluate the manufacturer’s warranty and customer service reputation for assistance on troubleshooting and repairs.

    • Community Feedback: Look for online reviews and user experiences to gauge reliability and performance over time.

    Additional Tips for Choosing the Right Printer

    When selecting a laser color printer, keep the following tips in mind:

    • Assess Your Needs: Determine your printing volume and types of documents you’ll print to ensure you select an appropriate model.

    • Consider Space: Make sure the printer fits your workspace; some models are compact, while others require more room.

    • Read Reviews: Consumer feedback provides insight into the real-world performance of a printer.

    By focusing on these features and considerations, you can ensure that your choice of laser color printer aligns perfectly with your specific needs, enhancing your printing experience.