Over the past decade, perovskite light-emitting diodes (PeLEDs) have emerged as a promising next-generation display technology, offering exceptional color purity, high efficiency, and low manufacturing costs. With red and green devices now achieving efficiencies comparable to commercial OLEDs, and blue devices making rapid progress, PeLEDs are drawing increasing attention from both academia and industry. However, several critical challenges remain before this technology can enter everyday products—such as smartphones, televisions, or lighting fixtures. These include improving the performance of blue-emitting devices, developing cost-effective methods to pattern pixels for full-color displays, and addressing concerns about the use of toxic lead in materials. Against this backdrop, this article provides a timely overview of where the field stands and what still needs to be done.
Led by Professor Jiang Tang’s group at Huazhong University of Science and Technology (HUST)—a team at the forefront of perovskite optoelectronics research—this study showcases the remarkable progress made in recent years. It also discusses the main obstacles that researchers are working to overcome—like making blue PeLEDs more stable and efficient, finding practical ways to manufacture high-resolution displays, and exploring lead-free alternatives that are safer for the environment. By presenting a clear picture of both progress and challenges, the article aims to guide future efforts toward making PeLEDs a viable and sustainable option for the displays and lighting of tomorrow.
The work entitled “Focus on performance of perovskite light-emitting diodes (2026)” was published in Frontiers of Optoelectronics (published on Mar. 16, 2026).

DOI:10.2738/foe.2026.0014