Pulse

Plessey's High Brightness LEDs

Solid-state lighting, powered by LED's, is the key technology for reducing the many TWh of electrical energy consumed and the many tons of greenhouse gases produced in generating light around the world. One of the main barriers for the migration to LED powered solutions is the initial investment cost as the LED's are manufactured using exotic material substrates. Plessey are the market leader in bringing LED's into the lower cost, mainstream world of semiconductors with their pioneering MaGIC process.

LED's are made using Gallium Nitride (GaN), a semiconductor material that has the best light emitting properties. Plessey's MaGIC (Manufactured on GaN IC) process is an innovative approach to LED production that will enable a leading and sustainable position for many years to come. The basis of this approach is to exploit the cost benefit of using standard Si substrates on which the GaN layer is grown. Plessey achieve this with patented technology that solves the physical mismatch issues that result from growing GaN on Si. In addition Plessey's MaGIC process utilises a thinner GaN layer that means a greater throughput and lower cost in the critical GaN layer growth process.


 

Plessey is bringing to market a range of LEDs for solid-state lighting applications

  • Solid-state lighting forms a significant part of the global effort to reduce energy consumption and greenhouse gas emissions.
  • LEDs are being designed into replacement products as well as architectural lighting, street lighting, commercial lighting and medical applications/li>

Plessey's innovative products combine a strong R&D and operational expertise with disruptive GaN-on-Si technology

  • Plessey acquired the University of Cambridge spinout CamGaN in December 2011 (includes LED knowhow, IP and patents).

Plessey's proprietary GaN-on-Si technology

  • Enables the growth of high performance GaN LED structures on standard silicon substrates
  • Unique synergies with Plessey's 6-inch processing facility in Plymouth
  • Plessey is now positioned among the first commercial players to successfully manufacture LEDs on 6-inch silicon substrates
  • This technology delivers industry-standard performance at a dramatically reduced cost of manufacture with estimated savings of up to 80%
Plessey's goal: To become the commercial leader in GaN-on-Si LEDs
The price and performance of Plessey's MaGIC LEDs will drive an affordable switch from 60W bulbs to LED lamps.

The LED market is said to

  • Almost double its penetration into the global lighting market by 2020.
  • Save trillions of kWh of electricity, equivalent to the output of hundreds of power plants.
  • Reduce emissions of CO2 by billions of tonnes.
  • Provide hundreds of billions of dollars in energy savings.

As a consequence of these benefits the market for white LEDs is said to grow exponentially over the next decade.

The use of standard silicon (Si) substrates is the foundation of Plessey's competitive advantage. Si substrates are widely available in larger sizes, higher volumes and lower prices than the sapphire and silicon carbide (SiC) substrates that are used for most of today's LED production. The race to industrialise GaN-on-Si has been an industry quest for the past few years, and Plessey are pleased to claim a leadership position today that can be maintained for many years to come. Independent market research predicts that GaN-on-Si will claim a significant share of the total LED market and Plessey will be at the forefront of this emerging trend.




Supply Chain Advantages

Plessey are the first LED supplier with a European wafer manufacturing base. This aspect is a real benefit for the many European based customers and design houses as it provides access to a local competence centre for all things related to the design and production of LEDís. As the LED market is still evolving this will allow for a high level of contact between Plessey and the European market shapers in the solid-state lighting market. Although product design and wafer production are European-based Plessey have a global presence for sales and technical support and will always adapt to any location changes of our customers and partners.


LED Futures

The first application of LED's is in existing form factors that allow for replacement of incandescent and fluorescent light sources. These products are usually a lot more expensive to buy but the higher efficiency leads to clear cost-of-ownership benefits and a greatly increased working life. Other benefits include the ease that LED's can be dimmed and that there are no end-of-life hazardous substance issues to be dealt with. Existing form factors often do not exploit the real strengths of LED technology but they are the most common application of LED products today.



LED Market Impact

LED's are a real game changer for the lighting market as they enable a completely fresh approach to lighting product and system design. A single LED die is practically a point source of light that means in terms of miniaturisation there are few boundaries to size and weight, this is vital for the rapidly evolving market in wearable electronics. But the application of LED's is not limited to smaller light sources, arrays of LED's can be configured in a virtually infinite number of form factors for large area lighting. And with the extremely long life of LED's there is often no need to provide for easy replacement in the system design.

Solid State Explained

The most common, traditional form of lighting - the incandescent bulb - produces light through thermal radiation: a metallic element in the bulb heats up and produces light. The second most common form 'the fluorescent tube' makes use of a high electric field applied to a mercury vapour that then generates light. Solid-state lighting also uses an electric field to generate light but it is applied across a solid structure rather than a gaseous vapour, hence the name solid-state lighting. The solid structure referred to is a semiconductor diode that emits light when an electric field is applied, this leads to the name Light Emitting Diode (LED). There are various types of LED that produce different colours (wavelengths) of light but the most common LED technologies produce blue light. By applying phosphor coatings the blue is converted to white light, the same principle as used in fluorescent tubes.



LED Reliability

The working life of LED powered lighting is many times greater than that of conventional light sources. This working life can extend to many decades, often longer than the expected life of the host application itself. For example, LED lighting can be embedded into a car dashboard, safe in the knowledge that the LED working life of 40-50 years clearly exceeds the expected working life of the car. To achieve such longevity some basic considerations need to be taken into account in the design and construction of the lighting system. The most critical element is the temperature: there is a direct correlation between the LED working life and the temperature they are subjected to. As with all electronic equipment exposure to moisture will also limit the working life. The practical control of these aspects is well understood and many LED products are now in use that we can confidently predict will last for decades to come.

Product Package Image Colour Nominal Flux (lm) CCT (K) Nominal Radiant Power (mW) Typical VF (V) IF (mA) Status Sample/Buy
PEM119020 3528 PEM119020 RGB - - - 3.3 20 Development Request Information
PLB010003 DIE PLB010003 Blue - - 3 2.9 5 Development Request Information
PLB010020 DIE PLB010020 Blue - - 20 3.3 20 Production Request Information
PLB010050 DIE PLB010050 Blue - - 55 3.1 60 Qualification Request Information
PLB010090 DIE PLB010090 Blue - - 84 3.3 100 Development Request Information
PLB010330 DIE PLB010330 Blue - - 300 3.0 350 Development Request Information
PLB111020 3528 PLB111020 Blue - - 20 3.2 20 Development Request Information
PLB113020 T1 ¼ (3mm) PLB113020 Blue - - 20 3.3 20 Development Request Information
PLB114050 3020 PLB114050 Blue - - 45 3.2 60 Qualification Request Information
PLB11A090 5630 PLB11A090 Blue - - 83 3.2 100 Development Request Information
PLB138003 1005 PLB138003 Blue - - 3 3.3 5 Development Request Information
PLW111020 3528 PLW111020 White 2.0 2870-6020 - 3.2 20 Development Request Information
PLW114050 3020 PLW114050 White 10.0 2870-6020 - 3.2 60 Qualification Buy
PLW117020 T1 ¾ (5mm) PLW117020 White 2.0 4600-15000 - 3.3 20 Development Request Information
PLW11A090 5630 PLW11A090 White 20.0 2870-6020 - 3.2 100 Development Request Information
PLW138003 1005 PLW138003 White 0.7 - - 3.3 5 Development Buy