Rational control of the interlayer space inside two-dimensional titanium carbides for highly efficient uranium removal and imprisonment

Rational control of the interlayer space of multilayered Ti3C2Txenables the MXene to exhibit an excellent U(vi) sorption capacity and an exceptional radionuclide encapsulation performance.

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Two-dimensional perovskites with alternating cations in the interlayer space for stable light-emitting diodes

Nanophotonics ◽

10.1515/nanoph-2021-0037 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Yiyue Zhang ◽

Masoumeh Keshavarz ◽

Elke Debroye ◽

Eduard Fron ◽

Miriam Candelaria Rodríguez González ◽

...

Keyword(s):

Thin Films ◽

Near Infrared ◽

Light Emitting Diodes ◽

Interlayer Space ◽

High Current Density ◽

Operational Stability ◽

Infrared Light ◽

Two Dimensional ◽

Commercial Development ◽

Light Emitting

Abstract Lead halide perovskites have attracted tremendous attention in photovoltaics due to their impressive optoelectronic properties. However, the poor stability of perovskite-based devices remains a bottleneck for further commercial development. Two-dimensional perovskites have great potential in optoelectronic devices, as they are much more stable than their three-dimensional counterparts and rapidly catching up in performance. Herein, we demonstrate high-quality two-dimensional novel perovskite thin films with alternating cations in the interlayer space. This innovative perovskite provides highly stable semiconductor thin films for efficient near-infrared light-emitting diodes (LEDs). Highly efficient LEDs with tunable emission wavelengths from 680 to 770 nm along with excellent operational stability are demonstrated by varying the thickness of the interlayer spacer cation. Furthermore, the best-performing device exhibits an external quantum efficiency of 3.4% at a high current density (J) of 249 mA/cm2 and remains above 2.5% for a J up to 720 mA cm−2, leading to a high radiance of 77.5 W/Sr m2 when driven at 6 V. The same device also shows impressive operational stability, retaining almost 80% of its initial performance after operating at 20 mA/cm2 for 350 min. This work provides fundamental evidence that this novel alternating interlayer cation 2D perovskite can be a promising and stable photonic emitter.

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Lanthanide doped two dimensional heterostructure nanosheets with highly efficient harvest towards solar energy

Materials & Design ◽

10.1016/j.matdes.2021.110023 ◽

2021 ◽

pp. 110023

Author(s):

Youqiang Huang ◽

Yingjie Zhao ◽

Yuan Liu ◽

Beibei Xu ◽

Shiqing Xu ◽

...

Keyword(s):

Solar Energy ◽

Two Dimensional ◽

Highly Efficient

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Enhanced electrochemical activities of morphologically tuned MnFe2O4 nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes

Nanoscale Advances ◽

10.1039/d1na00144b ◽

2021 ◽

Author(s):

R Rajalakshmi ◽

Remya K. P. ◽

Viswanathan Chinnuswamy ◽

Nagamony Ponpandian

Keyword(s):

Graphene Oxide ◽

Physicochemical Properties ◽

Reduced Graphene Oxide ◽

Two Dimensional ◽

2D Material ◽

Highly Efficient ◽

Reduced Graphene

The morphology of a nanoparticle strongly controls the path ofelectronic interaction, which directly correlates to the physicochemical properties and also the electrochemical comportment. Conjoining it with a two-dimensional (2D) material...

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