Perovskite LED Efficiency Hits 37% in Lab

An Emory University method lifts perovskite LEDs above the 20-30% range of most prior work, though it remains research-stage.

Updated on Nov. 2, 2026 in Chemistry

Glass substrate with a faintly luminous thin film resting inside a sealed steel-and-acrylic glove box, lit by cool overhead light. — Chemists at Emory University reported a perovskite LED efficiency peak of 37% in a Nature paper, above the 20-30% range of most prior work. AI Illustration. Upload story photo >

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Chemists at Emory University developed a method that raises the efficiency of perovskite light-emitting diodes, with a peak of 37% reported in a paper published in Nature. The work is research-stage and has not yet produced a commercial product.

Why it matters

Most prior perovskite LED work has ranged between 20% and 30% efficiency, so the reported peak marks a meaningful jump for a class of materials being explored as a cheaper alternative to conventional LED semiconductors. The result comes as inorganic LEDs have largely replaced incandescent bulbs, pushing researchers to find the next gain in light-emitting chemistry.

The reported 37% peak efficiency is a laboratory figure for perovskite LEDs, compared against the 20-30% range typical of most earlier work. The Dou lab's efficiency gain is tied to heating the solution for 20 minutes, which the researchers found produced the highest efficiency.

The players

Emory University

A private research university in Atlanta whose chemistry department hosts the Dou lab, where the perovskite LED work was done.

Letian Dou

Professor of chemistry at Emory University and senior author of the paper, who holds around 20 patents, five involving LEDs.

Sung-Doo Baek

Postdoctoral fellow in the Dou lab and first author of the paper, who noticed the batch with higher efficiency that prompted the study.

Nature

A peer-reviewed scientific journal that published the advancement in hybrid LEDs.

The details

Perovskite LEDs are made by spin-coating metal halide salts and additives in ultrathin layers inside a nitrogen glove box, a sealed chamber that keeps air and moisture out. The researchers synthesized and purified a linear compound and developed a method of targeted reaction-pathway control, meaning they steer which chemical products form during the reaction. Heating the solution for 20 minutes favors formation of the linear compound, which boosts LED efficiency, while suppressing a ring compound that harms it.

Starting in the 2010s, LEDs made from inorganic semiconductors began largely replacing incandescent bulbs.
In 2018, the additive for the basic perovskite LED formulation was discovered.
Last year, Letian Dou joined the Emory faculty as a chemistry professor.
The Emory News article on the perovskite LED advancement was published on November 2, 2026.

The Tech Race

The perovskite LED result pushes past the 20-30% efficiency range that has defined most prior work in this area. It also offers a chemistry-driven strategy for additive design that the researchers say could help drive further improvements.

The work remains at the laboratory stage, and no availability or pricing for perovskite LED products has been announced. Any consumer impact would depend on whether the efficiency gains and operational lifetime improvements can be carried over to manufacturing.

The takeaway

Watch for follow-up reports on the operational lifetime of these devices, which the Dou lab says it is still working to improve. The next verifiable milestone is whether the linear-compound additive approach reproduces the 37% peak in independent labs.