Lighting device with adjustable white light based on zirconia nanostructures

  • uacoopera
  • From Portugal
  • Responsive
  • Patents for licensing

Summary of the technology

A group of researchers from a Portuguese university has developed the concept of a lighting device with adjustable white light based on zirconia nanostructures. The invention aims to control the color temperature of white light emission that is different depending on the morphology/dimension of the particles, on the surrounding environment and on excitation power. The advantage of this type of device is based on the high color quality index and the possibility of color temperature control that is relevant to the lighting technologies market. The university is looking for companies that develop this type of solution on an industrial scale.
The university is looking for companies that develop this type of solution on an industrial scale for the further joint development of specific applications or technology licensing.

New and innovative aspects

Comparing to the existing technologies, the present invention provides the following innovative aspects: a) observation of white emission of zirconia nanoparticles under excitation in the infrared; b) color temperature of the emitted radiation depends on the optical excitation power, of the surrounding medium to the material, and of the characteristics of zirconia nanostructures; c) the radiation type is similar to that seen in incandescent lamp; d) compared to incandescent lamps this invention allows to produce a much more compact and robust and energy efficient device.


The search for alternatives to incandescent lamps is growing, emerging LED lamps as one of the most common alternatives. Such lamps, however, have low light quality. Thus, a Portuguese university has developed a solution that allows to obtain lighting devices with zirconia that emit white light when stimulated with infrared light. The tone (temperature) of the emitted color is adjusted to the change of infrared radiation.

This technology stands out from the current state of various lighting technologies due to the high color quality index and the possibility of color temperature control with better efficiencies than traditional incandescent bulbs. The interest of this technology is focus on the lighting market, filling an important niche that the current LED technology cannot cover.


  • Application in Lighting technologies, such as automotive, agriculture and indoors and outdoors lighting.

Intellectual property status

Pending patente application.

Current development status

Tested in the laboratory as proof of concept.

Desired business relationship

The university aims to license this technology to companies with development or production and marketing capacity of sensors for the development of business solutions based on the technology. The university is also available to participate in this development through a joint venture project or its subcontracting.

Related Keywords

  • Optics
  • Micro- and Nanotechnology
  • Inorganic Chemistry
  • Agriculture, Forestry, Fishing, Animal Husbandry and Related Products
  • Other speciality materials
  • Speciality/performance chemicals
  • Home furnishing and housewares

About uacoopera

The University of Aveiro is a young and innovative university, which fosters entrepreneurship and technology and knowledge transfer, with expertise in a wide range of knowledge areas namely IT, Life Sciences (Biology, Chemistry, Biochemistry, Health, Environmental Sciences), Nanotechnology and Materials Science, Mechanics, Physics, Mathematics, Building, Design and Management. uacoopera is the Technology Transfer Office of University of Aveiro. This office engages in value adding activities such as start-up and spin-off creation, support to university-industry cooperation (sponsored research and consultancy services), IP protection and prosecution, licensing, marketing, among others. It covers four main interrelated functional areas – Intellectual Property Management, Licensing, Entrepreneurship, and Industry Liaison.


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