Lee Boram, a professor in the School of Materials Science and Engineering at Sungkyunkwan University, said on the 16th that the team, through joint research with Professor Cho Changsun's group in the Department of Materials Science and Engineering at Pohang University of Science and Technology POSTECH, presented the feasibility of commercializing next-generation color-conversion displays based on perovskite.
Perovskite refers to a material whose crystal structure has a unique, regular three-dimensional framework in which two cations and one anion combine, like calcium titanate (CaTiO₃), and is named after Lev Perovski, a Russian scholar who discovered the mineral. With a high absorption coefficient, excellent color purity, and easy color-tuning characteristics, it is drawing attention as a key material for next-generation displays. However, because it contains lead, there has been a limitation in needing to meet the standards of the Restriction of Hazardous Substances (RoHS).
The researchers demonstrated that when perovskite is used as a "color-conversion layer" that converts the wavelength of light, it can absorb more than 99.9% of blue light while reducing the lead content to below the Restriction of Hazardous Substances standard.
Theoretical analysis showed that even if the perovskite is made as thin as one-fifth of conventional quantum dot-based color-conversion layers, color conversion is possible with high efficiency. As a result, high-purity green and red light can be generated without external color filters, which could be an important turning point in realizing next-generation displays.
Along with this, the researchers presented a design direction that combines various optical strategies, including light-scattering structures, photonic crystals, dimensional control, and photon recycling.
Professor Lee Boram said, "Perovskite color-conversion layers are already being actively studied, but this is the first case to specifically propose a simple structure that does not require external color filters while meeting environmental regulatory standards," and emphasized, "This study will accelerate the commercialization of eco-friendly, high-efficiency color-conversion display technology."
This study was published in the international journal "Nature Electronics" on the 12th.
References
Nature Electronics (2025), DOI: https://doi.org/10.1038/s41928-025-01456-5