A new stretchable quantum-dot light-emitting diode (QLED) delivers incredibly high resolution while producing record brightness that can be clearly viewed even outside in direct sunlight.

In a recent paper published in Nature Nanotechnology, Korean researchers unveiled a new QLED material with applications far beyond televisions, stretching into many future daily-use technologies.

This new QLED can stretch in every direction, just like organic skin, making it extremely useful in future wearable applications and as a covering for soft robots. Unlike earlier attempts to make a stretchable QLED, this one doesn’t lose picture quality when it stretches, delivering high resolution and extreme brightness under tension.

QLED Explained

For most of us, QLEDs are familiar as one of the technologies available in modern televisions. Conventional QLED TVs use quantum dots—nanoscale semiconductor crystals—to help produce exceptionally bright and vivid colors. OLED displays, by comparison, use self-emissive pixels that can switch off individually, allowing them to produce deeper blacks. While OLEDs perform particularly well in dark viewing environments, the high brightness achievable with quantum-dot displays can make them especially well-suited for brightly lit environments.

Despite the technology’s suitability for the bright world around us rather than just darkened environments, major challenges remained in producing a stretchable version. Early attempts addressed the problem by allowing the wiring to stretch while the light-emitting pixels remained unchanged in size. This meant that as the material expanded, its effective resolution dropped because the same number of pixels became spread across a wider area, much like enlarging a low-resolution digital image.

Building on these efforts, some researchers attempted to replace conventional materials with more stretchable alternatives, but these tended to make achieving high resolutions and efficiently moving electrical charge through the material difficult. As a result, these systems produced dimmer, lower-resolution images, limiting their utility.

A New Process

The researchers developed a new fabrication approach to address some of the major problems facing stretchable QLED technology. Central to their innovation is the use of an elastic polymer incorporating MPA as a ligand, or bonding molecule. This approach improves charge injection efficiency while helping eliminate the image stretching and smearing that have affected previous stretchable displays.

Using this new process, the researchers produced a display with a resolution of about 16,000 pixels per inch, with features spaced at roughly 700 nanometers. Red, green, and blue emissive layers can also be precisely arranged, allowing the stretchable material to produce full-color images.

Testing a New QLED

In tests, the team’s new QLED proved to be a major advance. They successfully stretched the material to 1.65 times its original size with no damage to its light-emitting performance. Additionally, their stretchable QLEDs were the brightest ever tested at 53,300 nits, more than triple the brilliance of prior attempts.

Based on these tests, the researchers see numerous future applications for their material in extended reality devices, soft robots, electronic skin, wearable technologies, health care, and automotive displays. 

“We resolved both the drop in resolution and the limits on light-emitting performance, which had been the biggest challenges for stretchable displays, and secured core technology for commercialization,” concluded co-author Professor Moon Kee Choi of Ulsan National Institute of Science and Technology in Korea. “It will be used widely as a manufacturing platform for various next-generation soft devices, including wearables and electronic skin.”

The paper, “High-Resolution Intrinsically Stretchable Quantum-Dot Displays Through Thermally Assisted Intaglio Transfer Printing,” appeared in Nature Nanotechnology on September 14, 2026.

Ryan Whalen covers science and technology for The Debrief. He holds an MA in History and a Master of Library and Information Science with a certificate in Data Science. He can be contacted at ryan@thedebrief.org, and follow him on Twitter @mdntwvlf.

Researchers at the TechMed Centre of the University of Twente have built a swallowable soft robot that samples stomach fluid

The elephant’s trunk is one of the animal world’s most formidable facial appendages; it is capable of tearing a tree limb from its base and, moments later, carefully lifting a single blade of grass.

Now, this combination of strength and precision is also helping to drive robotics research.

A boneless appendage that can both move heavy logs and peel fruit like a banana, the elephant’s trunk has long been studied by engineers seeking to understand how it can perform both powerful and delicate tasks effectively. Now, in a new study published in PNAS Nexus, researchers have identified the skin, rather than the underlying muscle, as a key factor in the versatility of this pachyderm appendage. 

Lucia Beccai and colleagues at the Istituto Italiano di Tecnologia studied the trunk of an adult Asian elephant that died of natural causes at Zurich Zoo in 2020. They collected 35 samples from different regions of the trunk and analyzed them using biomechanical testing, histology, various imaging techniques, and computational modeling. The team’s analysis revealed a trunk that combines two very different mechanical strategies within a single structure.

One Trunk, Two Skins

The elephant trunk acts as a muscular hydrostat, similar to an octopus tentacle or the human tongue. With no bones and over 100,000 muscles, the trunk can stretch, compress, twist, and bend in any direction. The trunk achieves this flexibility through a combination of muscle power and specialized skin architecture. The study found that the trunk’s outer surface varies in structure depending on location and the types of forces it encounters.

The researchers identified clear differences between the upper and lower surfaces of the trunk, reflecting what scientists call functional anisotropy. The trunk’s upper surface serves as a tough, protective layer, which is over three times stiffer than the underside. In contrast, the trunk’s lower surface remains soft and flexible, allowing the elephant to grip objects with delicacy and precision.

The way elephants use their trunks reflects this structural difference. The upper surface faces the environment and absorbs impacts and abrasions. The underside is used for gripping objects. Its lower stiffness allows it to adapt to the shape of objects and hold them securely. The design of the elephant trunk may offer a solution to a persistent challenge that has stumped soft-robotics engineers in balancing protection and precision by assigning each function to a different layer of skin.

A Lens Made of Tissue

Another significant finding was made beneath the gripping surface. The researchers identified dome-shaped structures known as dermal papillae. Finite element modeling suggested that these structures act as subsurface mechanical lenses, concentrating mechanical stress in regions where sensory nerves are located.

This design could solve an additional problem in robotics: touch sensors are often fragile and require protective coatings that can reduce their sensitivity. The tissue in the elephant trunk appears to protect sensory structures while still allowing mechanical signals to reach them.

The Biomimetic Blueprint

For Beccai’s group, which specializes in soft robotics, the possible design template represents a huge opportunity for their field. A robotic gripping device built on this idea would feature a stiff outer shell over a flexible inner layer, with structures underneath to direct pressure to protected sensors. This setup would keep sensitive electronics shielded while still allowing for mechanical feedback from touch.

This research adds to the growing scientific interest in the elephant trunk as a model for engineering. Another 2024 study in Communications Biology found that the trunk’s dermis is reinforced by tangled collagen fibers, creating skin armor thicker than an armadillo’s shell. Together, these studies show a structure optimized at every level, from the protein fibers in the dermis to the clear split between the upper and lower surfaces.

Today’s robotic hands still struggle to balance durability with sensitivity. The elephant trunk offers biological inspiration for this challenge, providing a model for future engineering designs.

Austin Burgess is a writer and researcher with a background in sales, marketing, and data analytics. He holds an MBA, a Bachelor of Science in Business Administration, and a data analytics certification. His work focuses on breaking scientific developments, with an emphasis on emerging biology, cognitive neuroscience, and archaeological discoveries.