January 9, 2006—Considering the growing importance of energy savings and environment friendliness, solid-state lighting is emerging a highly competent and viable alternative to existing lighting technologies, according to Frost & Sullivan, a global growth consulting company.
While light emitting diodes (LEDs) promise numerous advantages such as higher energy efficiency, longer life and reliability, as well as low temperature performance, customer requirements for innovative solutions that provide better control over the color, shape, and intensity of light is driving the demand for organic light emitting diodes (OLEDs) as light sources.
In respect to OLEDs, industry participants need to overcome key challenges such as outcoupling and sensitivity issues in order to increase the light output. Since increasing light output is dependent on the device technology and the chemistry of materials involved, the challenge lies in making the lifetime of the generated photon’s last nano or microseconds.
Nevertheless, research institutions across the globe are working towards addressing these shortcomings and the US-based PhosphorTech Corporation is developing low-cost high-extraction luminescent structures (HELMs) to increase the light extraction efficiency of standard LED devices, says the study. These HELMs perform dual roles as they convert the light from blue/ultraviolet (UV) LEDs to white and increase the extraction efficiency of blue/UV light from LEDs through refractive index matching.
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