Summary of the technology
The most innovative aspect of this innovation is that provides new optospintronic devices with low emission threshold voltages.
Also, the new devices have the following advantages:
Efficiency: light emission threshold voltages from 2 V.
Stability: use of air-stable electrodes, with high work function.
Spin valve properties (magnetoresistance): control of electrical properties by means of magnetic fields, for example light intensity and colour.
Low cost: manufacture with commercial and readily available materials, using soluble deposition methods, much cheaper, and viable on a large scale, that evaporative deposition methods.
Description of the tech for sale
A spin valve is a device, consisting of two or more conducting magnetic materials, whose electrical resistance can change between two values depending on the relative alignment of the magnetisation in the two layers. The resistance change is a result of the Giant Magnetoresistive effect. Currently, there are no commercial electroluminescent devices presenting spin valve behaviour. There have been various attempts that result in devices capable of emitting light only at very high threshold voltage, generally based on conventional OLED structures. The scientific goal for years has been to increase the spintronic polarization of these devices. Researchers from Universitat de València have developed a new opto-spintronic device with low emission threshold voltages (from 2V) in coexistence with magnetoresistance properties. These properties allow the control of the light emitted by means of external magnetic fields.
The new devices have been design using a HyLED configuration (Hybrid Organic-Inorganic Light Emitting Diode) instead of the conventional OLED configuration. This new configuration is based on the use of metal oxides as the electron injection layer, and is inverted with respect to OLEDs, hence making possible to develop simple, air-stable and cheap devices. All these known advantages of HyLEDs versus conventional OLEDs have had a surprising effect when applied to a new field as spintronics. Thus the researchers have achieved for the first time to manufacture a light emitting device controlled by external magnetic fields, with low emission threshold voltages and presenting high stability to air, with a greater interest for technological applications.
Main advantages of its use
- Its HyLED configuration enables the manufacturing of a simpler, cheaper and more air-stable apparatus than those based on OLED, with low emission threshold voltages. The invention is mainly engaging for optoelectronics and optospintronics applications (lighting, displays, etc).
- Opto-spintronic devices have many applications in molecular electronics and molecular spintronics. The ability to control by magnetic fields the light emission and the colour of the emission is especially interesting for optoelectronic applications: lighting, displays, optospintronics, etc.
About Universitat de València
Public Agency from SpainUniversitat 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.