Senior student Elina Battalova aspiring to create perovskite-based LEDs

She is one of the winners of the Student Startup grant competition.

Battalova’s research consultant is Head of the Laboratory of Quantum Photonics and Metamaterials Sergey Kharintsev.

“Inorganic halide perovskites are a family of materials with unique optoelectronic properties, one of which is the high quantum yield of photoluminescence. Our idea is to generate a new state of perovskites, which makes it possible to tune the photoluminescence wavelength in a wide range. To solve this problem, we proposed an original method of local photoheating using a thermoplasmonic metasurface,” explains the awardee.

A plasmonic metasurface is a two-dimensional mass of nanosized TiN:Si structures which are heated by light and serve as local heat emitters. Their temperature is regulated by a silicon waveguide and can fluctuate from single-digit to thousands of degrees Celsius.

“By placing perovskite nano- and microcrystals on such localized heat sources, one can create subwavelength temperature profiles. This will allow us to control the dispersion of the perovskite band gap. When illuminated with laser light, each heat source can emit light with a different wavelength,” adds Elina.

This work paves way to new types of light emitters and is important for display technology and holography.