Use of Hybrid PEDOT:PSS/Metal Sulfide Quantum Dots for a Hole Injection Layer in Highly Efficient Green Phosphorescent Organic Light-Emitting Diodes

Abstract

In this study, we have synthesized the molybdenum sulfide quantum dots (MoS2 QDs) and zinc sulfide quantum dots (ZnS QDs) and demonstrated a highly efficient green phosphorescent organic light-emitting diode (OLED) with hybrid poly (3,4-ethylenedioxythiophene)/poly (styrenesulfonate) (PEDOT:PSS)/QDs hole injection layer (HIL). The electroluminescent properties of PEDOT:PSS and hybrid HIL based devices were explored. An optimized OLED based on the PEDOT:PSS/MoS2 QDs HIL exhibited maximum current efficiency (CE) of 72.7 cd A−1, which shows a 28.2% enhancement as compared to counterpart with single PEDOT:PSS HIL. The higher device performance of OLED with hybrid HIL can be attributed to the enhanced hole injection capacity and balanced charge carrier transportation in the OLED devices. The above analysis illustrates an alternative way to fabricate the high efficiency OLEDs with sulfide quantum dots as a HIL.

Solution-Processed Self-Stratifying Layer with Controllable Dielectric Polarization for High-Luminance Organic Light-Emitting Diodes

“…Finally, we summarized the maximum efficiency and efficiencies at high luminance (at 1000, 2000, 5000, 10000, and 15000 cd/m 2 ) of green OLEDs with PEDOT:PSS and Ir­(ppy) 3 or its derivatives in this work and the reported studies (refs – and Figure f). It can be seen that the maximum efficiency of the OLEDs in this work is among the highest levels of the reported studies.…”

CdSe/ZnS quantum dots as a booster in the active layer of distributed ternary organic photovoltaics

“…They are also widely used in biological applications [ 21 – 23 ]. QDs have been used in various functions of solar cells, including electron- or hole-transporting layers [ 24 ], active absorbing layers, and other components [ 25 – 26 ]. Inorganic quantum dots are considered substitutes for fullerene acceptors.…”