Light-Emitting Electrochemical Cells based on ionic dyes

  • Universitat de València
  • From Spain
  • Responsive
  • Patents for licensing

Summary of the technology

The use of ionic dyes leads to materials that do not suffer from compatibility issues and allows for a much more economic production of LECs. These dyes are known for many years and used in applications such as photographic films and recordable DVD discs, and are produced in large quantities at low cost. Some examples of suitable ionic organic dyes are cyanine, hemicyanine and squarilene dyes.

Description of the tech for sale

Generally, organic light-emitting diodes (OLEDs) have considerable advantages compared to other solid-state lighting technologies. Today, best OLEDs use a multi-layer architecture that is very sensitive to ambient atmosphere. Light-emitting electrochemical cells (LECs) are much simpler, can be solution processed and are less sensitive to the ambient atmosphere. The main problem of these devices is that they use transition metal complexes, these are very rare metals and as a consequence very expensive. Researchers from Universitat de València have developed a new type of LEC that use ionic organic dyes as the electroluminescent material.


Researchers have found that these small ionic molecules are able to perform all necessary actions in LEC’s electroluminescent materials: transport of electrons, transport of holes and emission of photons. Therefore, it is not necessary to combine the dye with other charge transport material, simplifying and reducing the cost of the device.

Main advantages of its use

  • The new types of LECs have the following advantages: Low cost: manufacture with commercial and readily available materials Performance: satisfactory radiance, efficiency and lifetime levels of the device, suitable for future technological applications. Solution processable from benign solvents.


  • LECs are interesting candidates for use in thin-film lighting applications, as they operate at very low voltages (yielding high power efficient devices) and are easy to produce.

Related Keywords

  • Industrial manufacturing, Material and Transport Technologies
  • Industrial Technologies
  • Physical Sciences and Exact Sciences
  • Electronics, IT and Telecomms
  • Semiconductors Technology
  • Chemistry
  • Ionic Liquids
  • Industrial Products
  • Electronics Related Market
  • Semiconductors Market
  • Other semiconductors
  • Light emission
  • Ionic dyes
  • Ionic organic dyes
  • Ionic organic semiconductors
  • Light emitting electrochemical cell
  • Molecular chemistry
  • optoelectronics

About Universitat de València

The University of Valencia, founded over five centuries ago by the Juries of Valencia, is a modern European public University, open to almost all branches of knowledge: social, economic and legal sciences, Basic experimental sciences, engineering and Tehcniques, health sciences, educational sciences and the humanities.
More than 41,000 undergraduate students, 4,000 postgraduate students, 2,000 students from other universities all over the world, take classes taught by more than 4,000 professors, lectures and researchers at our campuses (more than 440.000 square meters) with the support of over 1,700 administration and service staff.
Our university community is committed to being a university of reference: we are ranked 4º in Europe in receiving Erasmus students and 5ª in sending of students (Ranking Erasmus Mobility); It is fourth spanish university in research at the international level, ranking between 201 and 300, according to Shanghai Jiao Tong University Rankings.
The University of Valencia is working in a wide range of investigative fields. The results of this activity are applied in a variety of productive sectors and social areas. Information of interest for businesses and public bodies about the Scientific and Technological Capacity of the University of Valencia is made available and offered for socioeconomic transfer through its Research Results Transfer Office (OTRI).
The OTRI is a service that manages and assesses in the generation and transfer of University knowledge towards the industry, encouraging the University role as an active agent in the economic and social development; makes easier the access to the University of Valencia research facilities; manage the intellectual property of the research results produced in the University and carry out its valorisation for efficient transfer, and offers orientation of university research groups towards the needs of Business, promoting and guiding effective relationships for exchange of knowledge applied to the needs of social and industrial environment, making easier its information dissemination and transfer.

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