High -bound energy content records qled performance and lifetime

A research team has developed a new content that can significantly enhance the lifetime and performance of quantum doting diodes (QLDS), which is the next generation display technology. Applying a high -bound energy organic material, which is resistant to harassment under electricity and thermal stress, is expected to help develop next -generation QLEDs that can maintain expansion and stability.

The study has appeared in the journal Little. The team was led by Professor Yingo Lee in the Department of Energy Science and Engineering in the DGIST.

Qleds have gained attention because the next generation has shown display thanks to their clear colors and excellent electricity performance. However, the commonly used tripleine -based HTL content is limits, as its molecular structure suffers from electric stress, resulting in time to deteriorate the performance of the device over time and result in a short life. Although various efforts were made to solve this problem, they often face a dilemma that reduced the movement of holes and the ability to stop the electron simultaneously.

To overcome these boundaries, Professor Lee’s team developed a new organic HTL content to include the “Debenzoforan” stable molecular structure. This material significantly increases intercollar binding energy and increases the movement of holes while reducing the back leakage and surface defects of the electron, thus improves both the performance and stability of the qleeds.

The team used this material to achieve 25.7 % high external quantum performance (EQE) in green qled devices. In addition, throughout the lifetime of the device (T₅₀ on 100 CDM ⁻iron), about 1.46 million hours, 66 times longer, demonstrating 66 times longer than traditional devices. It represents high performance in the same class (trailerin) materials reported to date.

“We have overcome the limits of traditional content with weak molecular bonds and developed a stable HTL that has dramatically improved the performance of the Cleuds and dramatically,” said Professor Lee of the Department of Energy Science and Engineering at the DGIST.