We develop light-emitting devices (pero-LEC or light electrochemical cells) based on perovskite-based composite materials. The resulting thin-film organic-inorganic optoelectronic devices combine the advantages of solid state semiconductor materials, the ability to control the photophysical properties of the hybrid media by countless synthetic modifications of their organic components and simple commercially available manufacturing techniques. Our goal is to create and study high-efficiency (> 30 lm/W) light-emitting devices of a new generation.
1. The creation of stable light emitting electrochemical cells
Liashenko, T. G., Pushkarev, A. P., Naujokaitis, A., Pakštas, V., Franckevicius, M., Zakhidov, A. A., & Makarov, S. V. (2020). Suppression of Electric Field-Induced Segregation in Sky-Blue Perovskite Light-Emitting Electrochemical Cells. Nanomaterials, 10(10), 1937.
2. Research and development of perovskite translucent light-emitting electrochemical cells
The main goal of the project is to create unique flexible high-brightness LEDs based on CsPbBr3:PEO perovskite and carbon nanotubes as electrodes. The use of CNTs over a thin perovskite film is innovative and has a number of advantages. Firstly, carbon materials are chemically resistant, so that such an electrode does not show any chemical decomposition as a result of reaction with halogens from perovskite. Secondly, due to the properties of CNTs, it is possible to obtain a flexible and transparent device.
To achieve this goal, we work on the architecture of the device and on the optimization of the perovskite layer, which will help increase the brightness and life time of the device. At the moment, the brightness of the devices is at the level of 500cd/m2, the life time is 6 minutes. The result of the work will be a prototype of a new translucent flexible light-emitting device, that will be used for displays, televisions, industrial display systems, etc.
3. Scaling of perovskite light-emitting diodes
In the laboratory of hybrid nanophotonics and optoelectronics the researches are working on scaling LEDs based on halide perovskites to centimeter sizes. For this purpose, it is proposed to use a slot-die coaster that can apply thin films to the substrate with an area of more than 10 cm2. The development of such methods is necessary for the transition from scientific research to industrial production of unique scientific developments.