Show laboratory "Advanced nanomaterials and optoelectronic devices" ITMO University

Show laboratory "Advanced nanomaterials and optoelectronic devices" ITMO University


At Habré we already had a whole series of small photo tours. We showed our quantum materials lab , looked at mechanized arms and manipulators in the robotics laboratory and looked into our thematic DIY-coworking (FabLab) .

Today we tell what (and what) one of our laboratories of the International Scientific Center of Functional Materials and Optoelectronics Devices works on.


In the photo: DRON-8 X-ray diffractometer

What are they doing


Laboratory "Advanced nanomaterials and optoelectronic devices" is open on the basis of the International Science Center, which is engaged in research of the latest materials , including semiconductors, metals, oxides in a nanostructured state, with a view to their use in devices and devices of optoelectronics.

Students, graduate students and employees of the Laboratory study the properties of nanostructures and create new semiconductor devices for micro- and optoelectronics. The developments are used in the field of energy-efficient LED lighting and will be in demand in the near future in high-voltage electronics of smart power grids ( smart grid ).

In the student community, the site for conducting research on Lomonosov Street, Building 9 is called the “ Romanov Laboratory ”, since both the Laboratory and the Center are managed by A. E. Romanov , Doctor of Physics and Mathematics, Leading Professor and Dean of the Faculty of Laser Photonics and Optoelectronics of the ITMO University, author of over three hundred scientific publications and winner of numerous international scientific grants and awards.

Equipment


The laboratory has installed an X-ray diffractometer DRON-8 from the Russian company Burevestnik (higher on KDPV). It is one of the main instruments for analyzing materials.

It helps to characterize the quality of the crystals and heterostructures obtained by measuring the X-ray diffraction spectra. For heat treatment of the developed thin-film semiconductor structures, we use this domestic installation.



We use modern semi-industrial systems for characterization, modification and sorting of LEDs. Let us tell you about the first one (pictured below on the left side).



This is a precision dispenser Asymtek S-820 . It is an automated system for dispensing viscous liquids. Such a dispenser is indispensable for accurate deposition of phosphor material on the LED chip in order to achieve the desired color of light.

Initially (by default) the white LEDs we are used to are based on chips emitting in the blue range of the visible spectrum of electromagnetic radiation.



This device (on the general photo in the center) measures the current-voltage and spectral characteristics of LED chips and stores the measured data for a large number of chips in the computer's memory. It is necessary to verify the electrical and optical parameters of the manufactured samples. This is how the installation looks like if you open the blue doors:



The third device in the general photo - the system of sorting and preparation of LEDs for subsequent installation. Based on the measured characteristics, it is a passport to the LED. After that, the sorter defines it in one of 256 categories, depending on the quality of the semiconductor device (category 1 are LEDs that do not glow, category 256 are those that glow most brightly in a given spectral range).



Even in our International Science Center, we are engaged in the growth of semiconductor materials and heterostructures. Heterostructures are grown by molecular beam epitaxy at the RIBER MBE 49 installation at the partner company Connector-Optics.

To obtain oxide single crystals (which are wide-gap semiconductors) from the melt, we use the NIKA-3 multifunctional growth facility of domestic production. Wide-gap semiconductors may have applications in future power relays, high-performance vertical VCSEL lasers, ultraviolet detectors, etc.

Projects


At the sites of the International Science Center in our laboratory a variety of fundamental and applied research is being carried out.

For example, in collaboration with researchers from the Ufa State Aviation Technical University, we develop new metallic conductors with high conductivity and high durability. For their creation methods of intensive plastic deformation are used. The fine-grained structure of the alloy is subjected to heat treatment, redistributing the concentration of impurity atoms in the material. As a result, the conductivity parameters and the strength characteristics of the material are improved.

Also, the laboratory staff are engaged in the development of manufacturing technologies for optoelectronic transceivers on photonic integrated circuits. Such transceivers will find application in the field of creating high-performance information transmission/reception systems. To date, a set of instructions for the manufacture of models of radiation sources and photodetectors is ready. Design documentation has also been prepared for testing.

An important laboratory project is dedicated to the creation of wide-gap semiconductor materials and nanostructures with low defect density. In the future, with the help of the materials being developed, we will be able to produce energy-saving semiconductor devices that have no analogues on the market yet.

Our experts have already developed LEDs that can replace unsafe ultraviolet based on mercury . The value of manufactured devices consists in the fact that the power of our ultraviolet LED assemblies is several times higher than the power of individual LEDs - 25 W against 3 W. In the future, the technology will find application in health care, water treatment and other areas where ultraviolet is used.

A group of scientists of our International Science Center believes that future optoelectronic devices will use the remarkable properties of nanoscale objects - quantum dots with special optical parameters. Among them are luminescence or non-thermal glow of an object, which is used in TVs, smartphones and other gadgets with displays.

We already are engaged in the creation of similar optoelectronic devices of the new generation. But, before the gadgets get on the market, we have to work out the production technology of materials and confirm the safety of the materials obtained for users.



Other photo tours of our laboratories:

Source text: Show laboratory "Advanced nanomaterials and optoelectronic devices" ITMO University