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Ultra-bright thin-film LEDs and lasers

02.04.2019

Super-bright LEDs and lasers have firmly entered our lives and are used both for conventional lighting and in various kinds of measuring electronics. Manufacturing technologies using thin-film structures could take these semiconductor devices to a new level. For example, thin-film transistors have made liquid crystal panel technology ubiquitous and accessible in a way that would not have been possible with discrete transistors alone.

In Europe, the task of developing a technology for the production of thin-film light-emitting diodes and semiconductor lasers was assigned to the well-known Belgian microelectronics scientist Paul Hermans (Paul Heremans). The pan-European Council European Research Council (ERC), which distributes funds for promising developments in Europe, has allocated a five-year grant to Paul Hermans in the amount of 2,5 million euros. This is not the first ERC grant Hermans has received. During his career at the Belgian research center Imec, he led many successful projects in the field of semiconductor development, in particular, in 2012, Hermans received a grant for a project for the production of crystalline organic semiconductors.

Thin-film LEDs and lasers are also expected to be developed using organic materials. Today, thin-film LEDs have a brightness that is 300 times weaker than that of discrete super-bright LEDs based on materials from groups III-V of the periodic table. Hermans' task will be to bring the brightness of thin-film structures closer to the capabilities of their discrete counterparts. At the same time, it will be possible to produce thin-film structures on thin and flexible substrates from a wide range of materials, including plastic, glass, and metal foil.

Progress on this front will make it possible to make a breakthrough in the mass of promising areas. These are silicon photonics, and displays for augmented reality headsets, and lidars for self-driving cars, and spectrometers for individual diagnostic systems, and much, much more.

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