Can still work after bending or stretching freely Professor Toshio Takashi from the University of Tokyo has made a breakthrough in flexible electronics by developing a thin-film organic EL (Electroluminescent) light source that can operate normally even when bent or stretched. This innovative material features a minimum radius of curvature of just 10 micrometers and can produce a luminance of 100 cd/m². The researchers believe this technology could revolutionize medical and health monitoring systems, offering a new kind of flexible light source for sensors. Sugani et al. recently introduced a pressure sensor on July 25 that is incredibly soft—so gentle it feels like a feather. In creating this sensor, the team successfully fabricated an electronic TFT-array using organic transistors on a flexible film substrate. Additionally, in 2011, Sericulture et al. developed a similar ultra-thin and lightweight organic solar cell, showing the growing potential of organic materials in flexible electronics. The development of this thin-film organic EL light source brings together all the essential components needed for advanced medical and health sensors, including organic TFTs, optical sensors, and light-emitting devices. These elements are expected to be integrated into ultra-thin films, enabling the creation of compact, wearable devices. For instance, in measuring vital signs like blood oxygen levels, a device combining a light source and a photodetector is commonly used. With this new organic EL light source, researchers hope to develop wearable medical devices that use light as a probe for real-time body monitoring. This new organic EL light source is extremely lightweight, weighing only 3 grams per square meter—comparable to the weight of the flexible sensor released earlier in July. Its thickness is just 2 micrometers, making it highly flexible and suitable for integration into wearable technology. The University of Tokyo developed a unique technique to directly stack organic EL elements onto a plastic film substrate as thin as 1.4 micrometers, resulting in a soft and lightweight light source. A key factor behind this breakthrough was the improvement in manufacturing techniques and the materials used in organic EL devices. Traditional substrates, such as glass, are often fragile, but here, the researchers opted for a flexible plastic film. To avoid damaging the delicate substrate during production, they replaced the conventional ITO (indium tin oxide) electrode, which requires high-energy processes like plasma deposition, with a low-temperature, spin-coated conductive polymer called PEDOT:PSS. While PEDOT:PSS had previously been used as a hole injection layer, the team discovered its potential as a functional anode in organic EL devices. This research was conducted in collaboration between scientists at the University of Tokyo and the Johannes Kepler University of Linz in Austria, led by Siegfried Bauer and Niyaze Serdar Sariciftci. The findings were published online in the journal *Nature Photonics* on July 28, 2013 (UK time). The study represents a significant step forward in the field of flexible optoelectronics and opens up new possibilities for next-generation wearable medical devices. Commercial Kitchen Equipment Hotel kitchen Equipment,Commercial Kitchen Appliance,Cooking Equipment,Refrigeration Equipment,kitchen food processor,stainless steel kitchen table Guangzhou Hotop Hotel Supplies Co.,Ltd , https://www.hotopsupply.com
Structure and main performance parameters of organic EL light source film
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Organic EL light source that is free to bend and will not be damaged
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