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The paper introduces an EHCz (9-2-ethylhexylcarbazole) liquid host molecule doped with 5,6,11,12-tetraphenylnapthacene, also known as rubrene, a luminescent OLED.
So far, OLED displays are solid-state and have the advantage of surpassing liquid crystal displays (LCDs) without backlighting. Due to the self-illuminating properties of OLEDs, in addition to power saving, they can be very safe, but the current display manufacturers Most support a wide range of low-cost LCD production, and OLEDs are based on small size applications.
"Now OLEDs are mainly made of all-solid organic thin films and some liquid crystals. No manufacturer has tried to produce pure liquid organic semiconductors; only a small part of them use polymer solutions and liquid-phase electroluminescence (solution-phaseel ectroluminescent). The technical exposure of the components," the author of the paper said.
In addition to helping to make flexible self-luminous displays, liquid semiconductor components can enhance the reliability and longevity of organic semiconductor systems such as FETs and solar cells. The authors of the report also proposed a "circulating OLED" in which the liquid organic semiconductor material inside the assembly is circulated or refilled into the active emitting layer. 
Japanese scientists invent liquid OLED technology to make flexible displays
An academic paper published by Denghui Xu and Chihaya Adachi from the Center for Future Chemistry of Kyushu University in Fukuoka, Japan, introduces a liquid-OLED display technology, which is known as a combination of OLEDs. Wide color gamut and enhanced bendability.