Perovskite quantum dots (PQDs) are a promising class of materials distinguished by their high absorption coefficient, cost-effectiveness, ease of processing, and reduced environmental impact. Their potential for display applications has attracted considerable interest. In 2015, Professor Zhong and his team introduced a groundbreaking method for in-situ fabrication of PQDs within a polymeric matrix. The subsequent establishment of Zhijing Technology (Beijing) Co., Ltd. in 2016 aimed to advance the scale-up production and application of PQDs in display technologies.
After extensive efforts, the company has developed several in-situ fabrication techniques to enable large-scale manufacturing. These methods include in-situ blade coating, spray drying, extrusion, inkjet printing, and lithography. Recently, the team resolved PQD stability challenges, leading to the integration of PQDs in Skyworth's TV products. Unlike conventional quantum-dot light-emitting diode (QLED) TVs that utilize 630 nm emissive materials, these innovations introduced deep-red emissive PQDs at 650 nm, enhancing eye care capabilities.
In January 2025, the journal Engineering published a research article titled "Spray-Drying Fabrication of Perovskite Quantum-Dot-Embedded Polymer Microspheres for Display Applications." This study highlighted the successful scale-up fabrication of PQDs, achieving a production capacity of 2000 kilograms annually. The research also demonstrated the use of PQDs in LCD backlight applications, where PQD-based optical films exhibited exceptional stability under challenging conditions. Aging tests showed brightness decay within 10% after 1000 hours at 60 C with 90% relative humidity and under 70 C conditions with 150 W/m2 455 nm blue light irradiation.
Furthermore, researchers showcased PQD-embedded polymer microspheres as efficient color converters in full-color Micro-LED displays with pixel sizes as small as 10 um. The spray-drying fabrication method provides a cost-effective solution for large-scale PQD production. These PQD-embedded polymer microspheres demonstrated remarkable long-term operational stability, making them highly competitive for use in advanced display technologies.
Research Report:Spray-Drying Fabrication of Perovskite Quantum-Dot-Embedded Polymer Microspheres for Display Applications
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Beijing Institute of Technology
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