Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent

  title={Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent},
  author={Kebin Lin and Jun Xing and Li Na Quan and F. Pelayo Garc{\'i}a Arquer and Xiwen Gong and Jianxun Lu and Liqiang Xie and Weijie Zhao and Di Zhang and Chuanzhong Yan and Wenqiang Li and Xinyi Liu and Yan Lu and Jeffrey Kirman and Edward. H. Sargent and Qihua Xiong and Zhanhua Wei},
Metal halide perovskite materials are an emerging class of solution-processable semiconductors with considerable potential for use in optoelectronic devices1–3. For example, light-emitting diodes (LEDs) based on these materials could see application in flat-panel displays and solid-state lighting, owing to their potential to be made at low cost via facile solution processing, and could provide tunable colours and narrow emission line widths at high photoluminescence quantum yields4–8. However… 

51.5: Invited Paper: Fabrication of High Performance Perovskite Optoelectronic Devices

  • Zhanhua Wei
  • Materials Science
    SID Symposium Digest of Technical Papers
  • 2019
Metal halide perovskite materials are an emerging class of solution-processed semiconductors with considerable potential for use in optoelectronic devices. For example, light-emitting diodes (LEDs)

Efficient blue light-emitting diodes based on quantum-confined bromide perovskite nanostructures

The emergence of inorganic–organic hybrid perovskites, a unique class of solution-processable crystalline semiconductors, provides new opportunities for large-area, low-cost and colour-saturated

Efficient and bright white light-emitting diodes based on single-layer heterophase halide perovskites

At present, electric lighting accounts for ~15% of global power consumption and thus the adoption of efficient, low-cost lighting technologies is important. Halide perovskites have been shown to be

Ligand-engineered bandgap stability in mixed-halide perovskite LEDs.

This work exemplifies how the functionality of metal halide perovskites is extremely sensitive to the nature of the (nano)crystalline surface and presents a route through which to control the formation and migration of surface defects to achieve bandgap stability for light emission and could also have a broader impact on other optoelectronic applications-such as photovoltaics-for which band gap stability is required.

The strategies for preparing blue perovskite light-emitting diodes

Metal halide perovskites have attracted tremendous interest due to their excellent optical and electrical properties, and they find many promising applications in the optoelectronic fields of solar

Efficient Perovskite White Light-Emitting Diode Based on an Interfacial Charge-Confinement Structure.

By tuning the dopant concentration of the phosphorescent emitter using this simple device structure, this work can controllably get Pe-WLEDs with very stable white light for display applications or tunable color from warm white to daylight for lighting applications.

Solution-processed green and blue quantum-dot light-emitting diodes with eliminated charge leakage

Quantum-dot light-emitting diodes (QD-LEDs) promise a new generation of efficient, low-cost, large-area and flexible electroluminescent devices. However, the inferior performance of green and blue

Quasi-2D perovskite emitters: a boon for efficient blue light-emitting diodes

Metal halide perovskites have accomplished excellent progress as forefront materials for near-infrared, red and green perovskite light-emitting-diodes (PeLEDs) with external quantum efficiencies

Highly Efficient Pure‐Blue Light‐Emitting Diodes Based on Rubidium and Chlorine Alloyed Metal Halide Perovskite

The judicious alloying is shown to be critical to result in the better morphology with suppressed current leakage and enhanced light outcoupling and the combination of these composition engineering results in blueshifted emissions without reducing the quantum yield.

The Rise of Perovskite Light-Emitting Diodes.

Recently, metal halide perovskite materials have attracted great interest in both photovoltaic and electroluminescent devices. The external quantum efficiency of the perovskite light-emitting diodes



Growth of Nanosized Single Crystals for Efficient Perovskite Light-Emitting Diodes.

By effectively controlling the crystal growth, perovskite films composed of uniform nanosized single crystals produced by introducing bulky amine ligands and performing the growth at a lower temperature maximized the radiative bimolecular recombination yield by reducing the trap density and spatially confining the charges.

Highly Efficient Visible Colloidal Lead-Halide Perovskite Nanocrystal Light-Emitting Diodes.

In high-efficiency PeLEDs based on colloidal perovskite nanocrystals synthesized at room temperature possessing dominant first-order excitonic radiation, it is found that the Auger nonradiative recombination is effectively suppressed in low driving current density range.

Self-assembled hierarchical nanostructured perovskites enable highly efficient LEDs via an energy cascade

Metal halide perovskites have established themselves as extraordinary optoelectronic materials, exhibiting promise for applications in large area illumination and displays. However, low luminescence,

Solution-processed, high-performance light-emitting diodes based on quantum dots

This optoelectronic performance is achieved by inserting an insulating layer between the quantum dot layer and the oxide electron-transport layer to optimize charge balance in the device and preserve the superior emissive properties of the quantum dots.

Efficient perovskite light-emitting diodes featuring nanometre-sized crystallites

Organic–inorganic hybrid perovskite materials are emerging as highly attractive semiconductors for use in optoelectronics. In addition to their use in photovoltaics, perovskites are promising for

Ultra-bright and highly efficient inorganic based perovskite light-emitting diodes

This work incorporated a small amount of methylammonium organic cation into the CsPbBr3 lattice and by depositing a hydrophilic and insulating polyvinyl pyrrolidine polymer atop the ZnO electron-injection layer obtained light-emitting diodes exhibiting a high brightness and high external quantum efficiency.

High-Efficiency Light-Emitting Diodes of Organometal Halide Perovskite Amorphous Nanoparticles.

This work proposes and demonstrates facile solution synthesis of a series of colloidal organometal halide perovskite CH3NH3PbX3 (X = halides) nanoparticles with amorphous structure, which exhibit high quantum yield and tunable emission from ultraviolet to near-infrared in light-emitting devices.

Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes

Efficient organic-inorganic perovskite light-emitting diodes were made with nanograin crystals that lack metallic lead, which helped to confine excitons and avoid their quenching.

Perovskite energy funnels for efficient light-emitting diodes.

A perovskite mixed material comprising a series of differently quantum-size-tuned grains that funnels photoexcitations to the lowest-bandgap light-emitter in the mixture functions as charge carrier concentrators, ensuring that radiative recombination successfully outcompetes trapping and hence non-radiatives recombination.

High-performance light-emitting diodes based on carbene-metal-amides

A new class of linear donor-bridge-acceptor light-emitting molecules is introduced, which enable solution-processed OLEDs with near-100% internal quantum efficiency at high brightness and rapid interconversion at the singlet-triplet degeneracy point.