LED

Researchers develop a method to achieve large-area efficient perovskite LEDs

A research team at Seoul National University, led by Prof. Tae-Woo Lee, has developed highly efficient large-area perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency (EQE) of 22.5% and pixel size of 102 mm2.

Professor Tae-Woo Lee's research team developed the scalable coating method of perovskite nanocrystals to make uniform large-area emitting films that helped fabricate these highly efficient large-area PeLEDs.

Read the full story Posted: May 25,2022

Researchers develop novel method to fabricate perovskite-based light-emitting diodes using quantum confinement

Researchers from The Hong Kong University of Science and Technology, Heilongjiang University, City University of Hong Kong and Sun Yat-sen University have developed a novel technique to fabricate perovskite-based light-emitting diodes using quantum confinement.

According to theory, by adjusting the compositions of the halide being used, i.e., iodine, bromine, and chlorine, the color of the emission may be fine-tuned. Nevertheless, color instability caused by migration of ions and separation in blended halides impedes the future development of perovskite-based LEDs, particularly blue perovskite-based LEDs, which require significantly higher voltages for proper operation. A potential strategy for achieving color controllability in perovskite-based LEDs is to use perovskite-based nanostructures which utilize quantum confinement.

Read the full story Posted: May 12,2022

Applications of perovskite materials in the display industry

This article was extracted from the Perovskite for Displays market report.

Given perovskites materials' unique optical properties, these materials are being intensively researched for both photovoltaic and display applications (as well as several others). In this article we will take a look into the possible application areas in the display industry that can benefit from perovskite materials.

Perovskite QDs

Perovskite-based QDs (PerQDs) are considered a viable Cd-free alternative for display applications, with high PL quantum yields, wide wavelength tunability and ultra-narrow band emission. The main advantages of PerQDs are:

  • Low cost
  • High performance
  • RoHS compliance (despite the lead content)

Read the full story Posted: May 04,2022

Researchers demonstrate large-area sky-blue perovskite LEDs

A research group, led by Prof. XIAO Zhengguo from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, has developed large-area and efficient sky-blue perovskite light-emitting diodes (PeLEDs) by blade-coating supersaturated perovskite solution.

Researchers Fabricate Large-area Sky-blue PeLEDs image

Metal halide PeLEDs can achieve high luminance at low voltage due to their high electrical conductivity, making them ideal for the next generation of energy-saving lighting. Blue/sky-blue PeLEDs are essential for white lighting, but the EQE of blue light is relatively low since the crystallization process of such perovskite films is difficult to control, which results in poor film quality.

Read the full story Posted: Apr 14,2022

The Perovskite for Displays Market Report updated to April 2022

Perovskite-Info is proud to announce an update to our Perovskite for the Display Industry Market Report. This market report, brought to you by the world's leading perovskite and OLED industry experts, is a comprehensive guide to next-generation perovskite-based solutions for the display industry that enable efficient, low cost and high-quality display devices. The report is now updated to April 2022.

Reading this report, you'll learn all about:

  • Perovskite materials and their properties
  • Perovskite applications in the display industry
  • Perovskite QDs for color conversion
  • Prominent perovskite display related research activities

The report also provides a list of perovskite display companies, datasheets and brochures of pQD film solutions, an introduction to perovskite materials and processes, an introduction to emerging display technologies and more.

Read the full story Posted: Apr 04,2022

Researchers achieve large-area and efficient sky-blue perovskite LEDs via blade-coating

Researchers from Beihang University and the University of Science and Technology of China (USTC) of the Chinese Academy of Science have developed efficient and large-area sky-blue Perovskite-based LEDs, through blade-coating supersaturated precursors.

This approach results in nucleation in the solution phase with much higher nucleation sites, and a faster crystallization rate. The uniform films formed by this method reportedly exhibit smaller grain size, lower trap density, and higher radiative recombination rate.

Read the full story Posted: Mar 14,2022

Researchers advance towards creating more stable blue perovskite LEDs

Researchers from the Okinawa Institute of Science and Technology Graduate University (OIST) have developed blue LEDs based on metal halide perovskites, that, for the first time, uses asymmetrical bridges to hold the layers of perovskite together, creating a more stable structure.

OIST team finds that aymmetry is key to creating more stable blue perovskite LEDs image

'Perovskites have the potential to be a real game-changer in the lighting industry,' said first author Dr. Yuqiang Liu, a former post-doctoral researcher in the OIST Energy Materials and Surface Sciences Unit and currently a professor at Qingdao University, China. 'In only a few short years, the efficiency of perovskite LEDs ' how well they can transfer electrical energy into light energy ' has shot up to a level that rivals traditional LEDs, and soon will surpass them.'

Read the full story Posted: Jan 25,2022

The Perovskite for Displays Market Report updated to January 2022

Perovskite-Info is proud to announce an update to our Perovskite for the Display Industry Market Report. This market report, brought to you by the world's leading perovskite and OLED industry experts, is a comprehensive guide to next-generation perovskite-based solutions for the display industry that enable efficient, low cost and high-quality display devices. The report is now updated to January 2022.

Reading this report, you'll learn all about:

  • Perovskite materials and their properties
  • Perovskite applications in the display industry
  • Perovskite QDs for color conversion
  • Prominent perovskite display related research activities

The report also provides a list of perovskite display companies, datasheets and brochures of pQD film solutions, an introduction to perovskite materials and processes, an introduction to emerging display technologies and more.

Read the full story Posted: Jan 19,2022

Researchers review ways to process transparent electrodes without causing damage to perovskite solar cells

A research team led by Erkan Aydin and Stefaan De Wolf from the KAUST Solar Center, along with co-authors from Turkey, the Netherlands and Spain, has presented an overview on the process of stopping damage from occurring to devices during the creation of transparent electrodes, particularly for a technique known as sputtering.

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Researchers study methods to prevent sputtering damages image

Damage from adding electrical contacts to sensitive semiconductors, including perovskites, can be mitigated using a buffer layer and optimized deposition. The new review gives a comprehensive overview for the origin and mitigation strategies for this technological problem.

Read the full story Posted: Dec 07,2021

Researchers develop perovskite-based 'unbreakable' glass for displays, lighting and more

A collaborative research team that included scientists from the University of Queensland (UO), the University of Leeds, Université Paris-Saclay and University of Cambridge, has developed perovskite-based composite glass that is virtually unbreakable and delivers crystal clear image quality.

UQ's Dr. Jingwei Hou said the discovery was a huge step forward in perovskite nanocrystal technology as previously, researchers were only able to produce this technology in the atmosphere of a laboratory setting as lead-halide perovskites NCs are extremely sensitive to light, heat, air and water. However, Hou said that 'Our team of chemical engineers and material scientists has developed a process to wrap or bind the nanocrystals in porous glass. This process is key to stabilizing the materials, enhancing its efficiency and inhibits the toxic lead ions from leaching out from the materials.'

Read the full story Posted: Oct 31,2021