APPLICATIONS OF TECHNOLOGY:
- Electronic displays
- Energy efficient lighting
- High photoluminescence quantum yield (PLQY)
- Tunable emission colors
- Cost effective fabrication
- High purity
- Air stability improvement
Halide perovskites are important materials for optoelectronics applications. Traditional methods of synthesizing the components of halide perovskites often face various challenges, like limited tunability, complex synthesis, impurities, energy inefficiency, and limited stability. New methods for synthesizing these materials are needed in order to improve upon these qualities.
Scientists at Berkeley Lab have developed a new method of stabilizing the emission centers of [M(IV)X6]2- octahedra, an important chemical component of halide perovskites, which are used in optoelectronics, lighting, displays, and other applications. By using a systematic supramolecular strategy for the assembly of these structures into extended networks, scientists were able to create [M(IV)X6]2- powders. When integrated with a UV light source, the combined system can generate near-unity PLQY blue emission.
In addition to high PLQY, these supramolecular assembled solids are highly tunable for emission color. Additionally, the synthesis process is much more cost-effective and mild than for traditional vacancy-ordered double perovskites. These supramolecular assembled solids can be fabricated using polar organic solvents at 80°C, while some double perovskites require high temperature (~800°C) solid-state synthesis. The supramolecular assembled solids also have higher purity than that of vacancy-ordered double perovskites, and have air stability up to several days.
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