Ultra-efficient Perovskite LED moving forward (1 Viewer)

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therium

Involved Wayfarer
Nov 1, 2018
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Michigan
(Using less energy could mean less pollution for the planet. LEDs are a specialty area of mine that I deal with. I've even made an LED light that uses dead batteries! Back about 2005 white LEDs were very expensive, about $80 each. So a cheaper white LED was the holy grail back then. Now we can get an LED flashlight from the Dollar Tree for $1usd! People on Youtube have also generated electricity using LEDs and the sun. While these projects are inefficient, they do work.)

Scientists at Tokyo Institute of Technology discover a new strategy to design incredibly efficient perovskite-based LEDs with record-setting brightness by leveraging the quantum confinement effect.

Several techniques for generation of light from electricity have been developed over the years. Devices that can emit light when an electric current is applied, are referred to as electroluminescent devices, which have become orders of magnitude more efficient than the traditional incandescent light bulb. Light-emitting diodes (LEDs) comprise the most notable and ubiquitous category of these devices.

https://www.sciencedaily.com/releases/2019/08/190808091411.htm

Kihyung Sim, Taehwan Jun, Joonho Bang, Hayato Kamioka, Junghwan Kim, Hidenori Hiramatsu, Hideo Hosono. Performance boosting strategy for perovskite light-emitting diodes. Applied Physics Reviews, 2019; 6 (3): 031402 DOI: 10.1063/1.5098871

NIH search for the study above: https://www.ncbi.nlm.nih.gov/pubmed/?term=LED+perovskite+applied+physics+kihyung

Related, From https://www.sciencedaily.com/releases/2018/11/181105122537.htm:

Compared to OLEDs, which are widely used in high-end consumer electronics, the perovskite-based LEDs, developed by researchers at the University of Cambridge, can be made at much lower costs, and can be tuned to emit light across the visible and near-infrared spectra with high colour purity.

The researchers have engineered the perovskite layer in the LEDs to show close to 100% internal luminescence efficiency, opening up future applications in display, lighting and communications, as well as next-generation solar cells.
 
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Lila

Collected Consciousness
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Jul 28, 2016
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Perovskite looks structurally like a really interesting stone; very organized:
Structure pics: https://www.princeton.edu/~cavalab/tutorials/public/structures/perovskites.html
From here: https://www.sciencedirect.com/topics/engineering/perovskite-structure
From applications in high-temperature superconductors to piezoelectric sensors, the perovskite structure has been used in a wide array of cutting-edge areas of solid-state physics and materials science.
A great summary (detailed): https://www.epfl.ch/labs/gmf/wp-content/uploads/2018/10/Perovskites_crystal_structure_important_compounds_properties.pdf
 

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