Water-Resistant Perovskite... Surpassing Quantum Dot TV?

Development of Perovskite Color Conversion Capsules for Displays
Significantly Improved Vulnerability to Moisture and High Temperatures
Expected Commercialization as Next-Generation Color Conversion Material to Replace Quantum Dots

Siloxane resin (left) dispersed with perovskite nanoparticles having uniform dispersion developed in this study and its cured product immersed in water

[Asia Economy Reporter Junho Hwang] Perovskite particles resistant to high temperature and high humidity environments have been developed. Perovskite is a material attracting attention as a next-generation display color standard emitter, and this research is expected to bring it one step closer to commercialization.

The Korea Advanced Institute of Science and Technology (KAIST) announced on the 24th that a research team led by Professor Byungsoo Bae from the Department of Materials Science and Engineering, in collaboration with Professor Taewoo Lee's team from Seoul National University’s Department of Materials Science and Engineering, developed perovskite nano-particle emitting resin with such properties.

Changes in the Luminescence Efficiency of Perovskite Nanoparticle Complexes Encapsulated with Siloxane Developed in This Study under Various Environments

The research team developed an encapsulated composite resin that simultaneously surrounds siloxane (a silicon-based polymer) molecular structures and perovskite nanoparticles using a self-developed sol-gel synthesis process. The siloxane molecular structure, which is heat-resistant, chemically protects the perovskite nanoparticles.

The team reported that the emission stability of perovskite nanoparticles was significantly improved even without a separate blocking layer. In particular, they applied the new technology to quantum dots and developed siloxane-encapsulated quantum dot resin stable under high temperature and high humidity conditions.

Although the perovskite nanoparticle resin encapsulated with siloxane initially showed low luminous efficiency due to ultraviolet curing during the manufacturing process, it exhibited a unique phenomenon of recovering to its original high value (> 70%) even under various chemical environments and high temperature and humidity conditions (85℃/85%). It also demonstrated excellent luminous stability, maintaining performance for over 600 days even underwater.

The perovskite nanoparticle complex encapsulated with siloxane developed in this study, fabricated in a large-area film form

The joint research team finally confirmed the performance as a color conversion layer for displays, verifying that the quantum efficiency and color reproduction rate improved compared to existing quantum dots. Furthermore, siloxane encapsulation blocked the toxicity of lead (Pb) within the perovskite nanoparticles, showing biocompatible properties, which suggests no issues in promoting commercialization.

Professor Byungsoo Bae of KAIST, who led the research, stated, "Perovskite nanoparticles are the only emitters capable of meeting the next-generation display color standards and are relatively inexpensive, but their vulnerability to moisture has prevented their use in ambient conditions. The new technology developed by our team will serve as a catalyst for research and development utilizing perovskite nanoparticles as a new display color conversion material replacing existing quantum dots, and ultimately, early commercialization is expected."

This content was produced with the assistance of AI translation services.