Efficient very-high color rendering index organic light-emitting diode

Enabling a bright orange–red emission with a high EQE with a seven-member-ring based fluorescent emitter with a matching host

“…Organic light-emitting diodes (OLEDs) are of tremendous interests because of their great potential in high-quality flat-panel displays and solid-state lighting applications [1][2][3][4][5]. To reach more energy-saving and hence have a long lasting device lifetime, devising OLEDs with a higher power efficiency is always demanded before reaching their theoretical efficiency limits.…”

Non-interlayer and color stable WOLEDs with mixed host and incorporating a new orange phosphorescent iridium complex

“…However, depending on the employed functional materials, device structure needs to be carefully designed. Another general strategy to achieve color stable WOLEDs is to insert an interlayer between different emitting layers [20,21]. Unfortunately, the power efficiency generally decreases because of the carrier-hurdle by the additional interlayer(s).…”

Color stable phosphorescent white organic light-emitting diodes with double emissive layer structure

“…This structure is quite good for two color WOLEDs, but not for three color WOLEDs because three color emitters do not have large energy difference. The second method is to insert the interlayer(s) between different emitting layers [22][23][24][25]. This interlayer could control balanced hole and electron movement regardless of voltage increase.…”