Product category:
Light Emitting Diodes (LEDs)
News Release from: Cambridge Display Technology
Edited by the Electronicstalk Editorial
Team on 20 May 2002
Experimental organic LED efficiency
rises
Scientists sponsored by display technology developer Opsys have developed high-efficiency bilayered green organic light emitting diode (OLED) devices.
Scientists sponsored by display technology developer Opsys have developed high-efficiency bilayered green organic light emitting diode (OLED) devices A maximum efficiency of 40 lm/W at 400cd/m2 was recorded for the OLEDs, which contain a solution processed light emitting dendrimer layer
This article was originally published on Electronicstalk on 15 Nov 2001 at 8.00am (UK)
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Research sheds new light on LEPs
The nature of one of the fundamental processes for light generation in light emitting polymer (LEP), materials has now been experimentally demonstrated by scientists from Cambridge and Oman.
Longer operating life for LEP displays
Cambridge Display Technology is claiming a dramatic improvement in the life performance of display devices based on light emitting polymer technology.
These results are the most efficient ever reported for such devices.
The work is a collaboration by Opsys sponsored teams led by Dr Paul Burn and Dr Oleg Salata at the University of Oxford, and by Professor Ifor Samuel, Royal Society Research Fellow at the University of St Andrews.
This latest result builds upon Opsys' recent groundbreaking announcement of 6.9 lm/W at 1500cd/m2 for a single-layered dendrimer device and brings dendrimer technology closer to commercial viability for efficient, low cost manufacturing of flat panel displays.
Currently, displays based on small molecule fluorescent materials are regarded as the most mature in the field of OLEDs.
However, small molecule materials can only be deposited by evaporation techniques and it is believed that in the future solution processing will provide a lower cost approach to large area full colour displays.
Michael Holmes Opsys CEO commented, "The production of high efficiency bilayered OLEDs builds on Opsys' recent dendrimer developments and consolidates our position as a leading display technology developer.
Dendrimers have the potential to make long-term improvements in colour quality, power efficiency, lifetime and processing costs of displays.
These are vital for OLEDs to fulfil their potential for growth within the displays sector and to meet their transformational expectations in lighting, decor and signage applications".
Opsys is the exclusive licensee of patent applications involved in this work and the publication of these results further strengthens the company's position as the key intellectual property holder of light emitting dendrimer technology for OLEDs.
The results will be announced by Professor Ifor Samuel at the forthcoming Society for Information Display 2002 conference in Boston, MA, on Wednesday 22nd May.
They will also be published in a paper entitled "A green phosphorescent dendrimer for light-emitting diodes", in Advanced Materials, on 4th July 2002.
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