TOMSK, Jul 31 – RIA Tomsk. Scientists of Tomsk State University (TSU) developed a technology
for the production of blue diodes based on organic molecules, which are
necessary for creating displays for phones, televisions and tablets, the press
service of the university said on Wednesday.
It is specified that TSU physicists were the first in
Russia to solve the problem of creating blue organic light-emitting diodes
(OLED – organic light-emitting diode). OLED technology is much cheaper and more
economical than LCD (liquid crystal) technology. In addition, these LEDs are
easy to dispose of. The project was implemented with the support of a grant of
the Russian Science Foundation (RSF).
"They are necessary to create displays for
phones, televisions, tablets and other devices based on cheap materials – heterocirculenes.
Blue diodes on organics remain the last technically complex "link"
for the RGB structure (red, green, blue)", – is said in the statement.
According to TSU scientists, the technology of
creating red and green OLEDs is almost perfected, and the creation of blue
OLEDs for RGB layers is still an urgent task. Here it is necessary to search
for stable substances that shine effectively in the blue range at low voltages.
TSU physicists proposed to use organic molecules of circulenes, which are
highly stable and have good luminescent characteristics.
"In 2016 we predicted the luminescent properties
of circulenes using quantum chemistry methods. Later, our colleagues from
University of Copenhagen were able to synthesize them. This year we were able
to create OLEDs in Tomsk. First, white OLEDs were made on them, because it was
difficult to create blue ones. But we solved the technical problem by removing
the excimer radiation", – the associate professor of TSU Rashid Valiyev is
quoted in the message.
White OLEDs are used in the manufacture of luminaires:
with low power supply, they are highly efficient. In the future, scientists are
planning to improve the technology of production of blue OLED on circulenes for
flexible displays. According to the university, OLED technology has recently
captured the consumer electronics market, including phones, televisions and
has been engaged in the OLED technology since 2013.