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Flexible Tellurium Nanorope Films
In article number 2300557, Tae Geun Kim and co‐workers present hexagonal‐shaped, ultrathin and highly flexible Te and Te–metal nanorope arrays grown by low‐power radiofrequency (RF) sputtering. Blue organic light‐emitting diodes (OLEDs) with 7‐nm Te–W nanoropes as the anode exhibit significantly higher external quantum efficiencies, lower turn‐on voltages and superior...
Nanomaterials that can be easily processed into thin films are highly desirable for their wide range of applicability in electrical and optical devices. Currently, Te‐based 2D materials are of interest because of their superior electrical properties compared to transition metal dichalcogenide materials. However, the large‐scale manufacturing of these materials is challenging, impeding their commercialization...
Phase‐change random‐access memory is a promising non‐volatile memory technology. However repeated phase‐change operations can cause durability issues owing to defects formed by long‐distance atom diffusion. To mitigate these issues, phase‐change heterostructure (PCH) devices with confinement material (CM) layers based on transition metal dichalcogenides (TMDs) such as TiTe2 have been proposed. This...
Phase‐Change Heterostructure Memory
In article number 2303659, Tae Geun Kim and co‐workers present phase‐change heterostructure (PCH) memory devices that control vertical atomic diffusion during operation. The device performance, such as power consumption and thermal stability, is determined by the choice of transition metal dichalcogenide‐based confinement materials with different cohesive energies,...
The oxygen‐evolution reaction (OER) is critical in electrochemical water splitting and requires an efficient, sustainable, and cheap catalyst for successful practical applications. A common development strategy for OER catalysts is to search for facile routes for the synthesis of new catalytic materials with optimized chemical compositions and structures. Here, nickel hydroxide Ni(OH)2 2D nanosheets...
In article number 1703481, Hyungsang Kim, Hyunsik Im, and co‐workers fabricate Ni(OH)2 two dimensional (2D) nanosheets pillared with zero‐dimensional (0D) polyoxovanadate (POV) nanoclusters as an oxygen‐evolution reaction (OER) catalyst that can operate in alkaline media. The intercalation of POV nanoclusters into Ni(OH)2 induces the formation of a nanoporous layer‐by‐layer stacking architecture of...
In article number 1801032, Tae Geun Kim and co‐workers use AlN thin film electrodes with nanoscale indium/tin conducting filaments produced by the application of electric fields for nitride‐based microlight‐emitting diodes (μLEDs). These μLEDs exhibit much improved performance in terms of light emission as well as injection current density, owing to the ultra‐high transmittance and efficient hole‐injection...
Microlight‐emitting diodes (µLEDs) are emerging solutions for both high‐quality displays and lighting technologies. However, the overall light output power density of these devices is low, as the emission area is shielded by the p‐electrodes required for current injection. In this study, instead of the more conventionally used indium tin oxide (ITO), an AlN thin film with nanoscale conducing filaments...
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