Researchers from Seoul National University developed a flexible green OLED device
that uses 2D titanium carbide MXene as a flexible and transparent electrode.
The display achieved an efficiency of 100 cd/A, comparable to ITO-based devices,
while showing good bending stability.
The researchers say that the MXene electrodes are much more flexible than ITO
electrodes and this material could hold the key towards highly flexible transparent
conductive display electrodes. MXenes, a new class of twodimensional materials
discovered at Drexel University in 2011, consist of few-atoms thick layers of transition metal carbides or nitrides. They have shown impressive
properties such as metal-like electrical conductivity and tunable surface and electronic properties.
Conventional MXene films do not meet the requirements of work function and
conductivity required in displays and PV applications and degrade when exposed
to acidic waterbased hole injection layer (HIL). This new research tuned the MXene
film to achieve a high work function using low-temperature vacuum annealing.
The also design the HIL to be pH-neutral and be diluted with alcohol.