Chinese scientists develop ultra-stable perovskite LEDs
Source: Xinhua
Editor: Huaxia
Date: June 14, 2025
HEFEI, June 14 (Xinhua) — Researchers at the University of Science and Technology of China have made a significant advancement in enhancing the lifespan of perovskite light-emitting diodes (LEDs). This breakthrough was led by Professor Xiao Zhengguo and involves a novel technique for creating all-inorganic perovskite films that feature larger crystal grains and improved heat resistance. As a result, the brightness of these LEDs has surpassed 1.16 million nits, with an operational lifespan extending beyond 180,000 hours.
This innovative technology successfully addresses the long-standing challenge where perovskite LEDs have struggled to achieve both high efficiency and stability concurrently. According to Professor Xiao, this development holds considerable promise for widespread use in high-end displays and ultra-high-brightness lighting. The findings of this research have been published in the esteemed journal Nature.
Perovskite is a cutting-edge material recognized for its exceptional luminous efficiency, affordability, and processing adaptability, indicating its vast potential applications in solar cells, LEDs, and photodetectors. However, traditional perovskite materials often face issues where electrons and holes — the charge carriers responsible for light emission — do not collide effectively enough to generate light.
Previously, researchers attempted to enhance luminous efficiency by creating very small nanoparticles or ultra-thin material layers. Unfortunately, this method came with the downside of limited LED brightness and short lifespans, typically lasting only a few hours, which constrained practical applications.
To tackle this issue, the research team adopted a fundamentally different approach. By incorporating specific compounds into the perovskite material and utilizing a high-temperature annealing process, they were able to produce a new type of perovskite film characterized by larger crystal grains and fewer defects. This innovative material demonstrates a higher degree of internal order, greatly improving the stability and brightness of the LEDs.
The study revealed that this new perovskite LED achieves a luminous efficiency greater than 22 percent, comparable to that of commercial display products. With a peak brightness reaching 1.16 million nits, this new perovskite LED significantly outshines current mainstream commercial OLED or LED screens, which typically have peak brightness levels in the thousands of nits. When calculated at a standard brightness level of 100 nits, the theoretical lifespan of the new perovskite LED exceeds 180,000 hours, meeting the rigorous standards required for commercial LED products.
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