Plextronics' Plexcore printable ink improves performance in P-OLED devices

Dec. 23, 2008
Date Announced: 23 Dec 2008 PITTSBURGH, Dec 18, 2008 -- Plextronics, Inc. - an international technology company that specializes in printed solar, lighting and other organic electronics - announced today that its conductive ink has been shown to improve the performance of certain P-OLED devices. Polymer OLEDs (P-OLEDs) are a fast growing, new generation of display technology, which promise to replace liquid crystal displays (LCDs) in many existing applications in the coming years, as well as create exciting possibilities for new product forms such as flexible or even wearable displays. Plextronics requested an independent validation of test data obtained from its Plexcore(R) Organic Conductive (OC) ink by Cambridge Display Technology, Inc. (CDT) -- a subsidiary of Sumitomo Chemical Co. Ltd. Data produced by CDT on Plextronics' behalf show improved P-OLED operating voltages and voltage stability compared to other solution processed HIL alternatives that have been previously reported. For blue P-OLED test devices, a two volt reduction in initial operating voltage was achieved with improved voltage stability over the lifetime of the devices (less than 0.5V increase), a significant improvement over other solution processed HIL alternatives that have been previously reported. Improving voltage characteristics in P-OLEDs is critical to reducing the power consumption of these devices, while maintaining or improving device lifetimes. David Fyfe, CEO of CDT, commented, "Lower power consumption is critical for mobile display applications, such as cell phones and mp3 players. We are pleased to see Plextronics making significant progress on HILs and developing materials that bring such voltage improvements to P-OLED devices." "With its Plexcore(R) OC ink, Plextronics brings a technology platform that can be tuned to meet the needs of CDT's specific device architecture, with the potential to enable improved energy efficiency and lifetime in its P-OLED devices," said Andy Hannah, Plextronics' CEO. About Plextronics, Inc. Plextronics, Inc. is an international technology company that specializes in printed solar, lighting and other organic electronics. Headquartered in Pittsburgh, PA, the company's focus is on organic solar cell and organic light emitting diodes (OLED), specifically the conductive inks and process technologies that enable those and other similar applications. With a company vision of enabling 15 billion printed electronic devices by 2015, Plextronics is creating technology capable of commercial-scale manufacturability and performance. The company's device design, process technology and Plexcore(R) branded inks enable the formation of active electrical layers -- the key drivers of printed electronics. The privately held company was founded in 2002 as a spinout from Carnegie Mellon University, based upon conductive polymer technology developed by Dr. Richard McCullough. Over the past six years, Plextronics scientists have refined and further developed this technology to deliver exceptional performance for printed electronics. Specific to the Plexcore(R) OC ink, it is a multi-functional conductive material compatible with a number of printing techniques including spin-coating, ink jet printing, and contact printing. The inks are customizable to possess a wide variety of film properties, dependent upon its desired function and performance requirement. The inks are ideal for integration into various printed electronic applications. They can be tailored to the specific needs of a given application and meet the stability needs required for high volume manufacturing. About CDT Cambridge Display Technology (CDT), headquartered at Cambourne near Cambridge in the UK, was spun out of Cambridge University in 1992 and acquired by Sumitomo Chemical, Japan in September 2007. Together CDT and Sumitomo lead the research and commercialization of light emitting polymer technology used in displays and lighting applications. Devices incorporating this technology are often referred to as P-OLED, or polymer organic light emitting diode, devices. CDT holds an extensive patent and know-how portfolio relating to P-OLED materials and devices and actively licenses this portfolio to display and lighting companies around the world. CDT and Sumitomo engage in a wide range of Organic Electronics activities such as organic thin film transistor (OTFT).

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