May 15, 2018 in the framework of the week "Kultegin" at the Faculty of Physics and Technology ENU them. L.N. Gumilev held a PhD seminar, Senior Lecturer of the Department of Technical Physics Daurenbekov D.Kh. on the topic "Fluorescent Converters Based on Quantum Dots of Semiconductors to Increase the Effectiveness of Active Silicon Solar Cells".
 The topic considered in the course of a scientific seminar is very relevant today. Increasing the efficiency of solar cells is an important task of modern science and technology. It is known that the “working” spectral range for solar cells based on polycrystalline silicon lies in the red and near infrared regions. Most (about 70%) of ultraviolet and visible solar radiation goes to heat solar cells, so only 30% of solar radiation is used to generate electricity. To increase the efficiency of solar cells, it is necessary to convert high-energy solar radiation into radiation of the red range.
 
In this regard, fluorescent converters are being investigated, for down-conversion of the high-energy solar spectrum into the long-wavelength region, where solar cells have the best response.
 
At present, semiconductor nanostructures, such as quantum dots (QDs), quantum wells, filaments, etc., exhibit physical properties different from the bulk material, due to quantum-size effects. Of great practical interest are nanoparticles stabilized by organic molecules, the so-called colloidal quantum dots (QCT).
 
The development of new photosensitive materials for solar cells is of great interest in connection with the development of alternative energy sources, in which CCPs act as sensitizers. Prospects for the use of CCT in solar cells (SC) due to the high extinction coefficient, radiation resistance, resistance to photodegradation and high stability of luminescence. At present, the use of nanostructures makes it possible to obtain solar cells that work effectively in the entire region of the spectrum of solar radiation.