Pb(OH)2 Precursor and La3+ Doping Synergy: Polyethylene Terephthalate-Encapsulated Quantum Dot Films Achieve Low-Cost
Ziyi Jiang1, Xintong Cao1, Enrou Mei1
1College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.
ACS Applied Materials & Interfaces
|October 28, 2025
Summary
This study introduces a cost-effective and stable perovskite quantum dot (PQD) technology for liquid crystal displays (LCDs). By using eco-friendly materials and lanthanum, PQDs achieve enhanced color performance and durability for industrial applications.
Area of Science:
- Materials Science
- Quantum Dot Technology
- Display Technology
Background:
- Perovskite quantum dots (PQDs) offer excellent color purity for liquid crystal displays (LCDs).
- High cost and poor stability hinder PQD industrialization.
- Traditional lead sources like PbBr2 are expensive and raise environmental concerns.
Purpose of the Study:
- To develop a cost-effective and stable PQD solution for LCDs.
- To improve the optical performance and durability of PQDs.
- To enhance the color gamut of light conversion films for displays.
Main Methods:
- Replaced traditional PbBr2 with eco-friendly Pb(OH)2 to reduce costs.
- Introduced La3+ to CsPbBr3@glass to enhance photoluminescence quantum yield (PLQY) and stability.
- Developed CsPbBr3&CsPbBr1I2@glass@PET light conversion films.
Main Results:
- Reduced raw material costs by nearly 50%.
- Increased PLQY from 48% to 86%.
- Achieved 87% PL intensity retention under harsh conditions (60°C, 90% RH, 8000 nit blue light for 40 days).
- Developed films covering 94.75% NTSC and 70.74% Rec.2020 color gamuts.
Conclusions:
- The developed PQDs offer an efficient, stable, and low-cost industrial solution for quantum dot film technology.
- The use of Pb(OH)2 and La3+ significantly improves PQD performance and stability.
- Enhanced PQDs substantially improve color performance in LCD screens.
