Pure White Light Emitting Nanomaterial “NanoLite”

Background

Consumers and industry are seeking safe, durable, energy efficient
alternatives to traditional incandescent light bulbs as this traditional form of lighting continues to be phased out (Europe started 2009, Canada in
2012). CFLs are energy efficient however they contain mercury, a toxic
substance that requires special handling for disposal and in the case of
bulb breakage. LEDs are a safer, longer lasting alternative to CFLs,
however manufacturing White LEDs is a rather complicated and expensive
procedure.

Pure materials (molecules or semiconductors) generally emit light in a
narrow range of the visible spectrum making the design of white light
emitters very challenging and costly. Currently, “white” LEDs are created
by first creating a blue LED and then applying an additional coating
containing a mixture of different phosphors to create an approximate white
appearance. These LED’s use costly substrate material (i.e. sapphire).
Another method of creating a white LED is more complicated and involves
combining red, green, and blue LEDs to approximate a white light.

Description of the invention

Researchers at the University of Waterloo have created a low-cost hybrid
nanomaterial which illuminates pure white light and can be processed into
light emitting structures and devices from liquid (i.e. solution) or solid (i.e.
powder) forms. A white-light emitting system has been developed that can
operate with high efficiency as a single entity, be prepared easily,
reproducibly, and at low cost by the electronic structure design. The hybrid material acts as a single illumination entity (chromophore), rather than a mixture, and provides a homogeneous and uniform white light emission. Because of its versatility and chemical compatibility this material can be used in various configurations and devices and can also be used to
produce other colours of light.

Advantages

  • 10x-100x cheaper material costs and higher efficiency (more lumens per watt)
  • Can be integrated with existing solid state mfg. equipment or used in liquid solution applications (e.g. printing, spraying, casting which enables creating unusual LED shapes)

Potential applications

  • Pure white LEDs for general lighting, display panel backlighting (TV, computer monitor, smartphone, etc.)
  • Unique architectural applications
  • Potential solar panel applications
  • Potential to substantially increase the efficiency of florescent lights by increasing their UV efficiency
  • Potential to eliminate the use of toxic materials in florescent lights

Printable PDF

Pure white light emitting nanomaterial “NanoLite”

Reference

8810-7327/7393

Inventors

Pavle Radovanovic et al.

Patent status

Issued U.S. patent and applications in Europe and Canada

Stage of development

Working prototype

Contact

Scott Inwood
Director of Commercialization
Waterloo Commercialization Office
519-888-4567, ext. 33728
sinwood@uwaterloo.ca
uwaterloo.ca/research