Efficient quantum dot light-emitting diodes with solution-processable molybdenum oxide as the anode buffer layer

Abstract

Quantum dot light-emitting diodes (QD-LEDs) are characterized by pure and saturated emission colors with narrow bandwidth. Optimization of the device interface is an effective way to achieve stable and high-performance QD-LEDs. Here we utilized solution-processed molybdenum oxide (MoOx) as the anode buffer layer on ITO to build efficient QD-LEDs. Using MoOx as the anode buffer layer provides the QD-LED with good Ohmic contact and a small charge transfer resistance. The device luminance is nearly independent of the thickness of the MoOx anode buffer layer. The QD-LEDs with a MoOx anode buffer layer exhibit a maximum luminance and luminous efficiency of 5230 cd m(-2) and 0.67 cd A(-1) for the yellow emission at 580 nm, and 7842 cd m(-2) and 1.49 cd A(-1) for the red emission at 610 nm, respectively.

Morphology Engineering for High‐Performance and Multicolored Perovskite Light‐Emitting Diodes with Simple Device Structures

“…The active area of the devices is 4 mm 2 . Figure b shows the energy level diagram of green MAPbBr 3 PeLEDs, and all energy level values were taken from literature . When suitable bias is applied, electrons inject into aluminum electrode.…”

MoO3-induced oxidation doping of PEDOT:PSS for high performance full-solution-processed inverted quantum-dot light emitting diodes

“…The solutionprocessed electron/hole injection layers can be readily adopted using these metal oxides. [17][18][19][20][21][22][23] However, high quality full-solution processed top electrode is still one of the challenges the QD-LEDs face today. Various solution-processable top contact materials, including metal nanowires, graphene, carbon nanotubes, conductive polymers, have been developed to replace the top metal electrode formed typically using thermal evaporation process.…”

High-efficiency CdTe/CdS core/shell nanocrystals in water enabled by photo-induced colloidal hetero-epitaxy of CdS shelling at room temperature

“…Among them, CdSe QDs have been the major choice for LED studies, in particular in the form of passivated CdSe/ZnS and CdSe/CdS core-shell architecture [3,[12][13][14]. The popularity of CdSe QDs stems from their relative stability, plus the high quantum efficiency of luminescence.…”