Supramolecular assembly of blue and green halide perovskites with near-unity photoluminescence.
basic_science · Level V
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- Record sourced from PubMed, PMID 38175897.
- Also identified by DOI 10.1126/science.adi4196.
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Abstract
The metal-halide ionic octahedron is the optoelectronic unit for halide perovskites, and a crown ether-assisted supramolecular assembly approach can pack various ionic octahedra into tunable symmetries. In this work, we demonstrate near-unity photoluminescence quantum yield (PLQY) blue and green emission with the supramolecular assembly of hafnium (Hf) and zirconium (Zr) halide octahedral clusters. (18C6@K)<sub>2</sub>HfBr<sub>6</sub> powders showed blue emission with a near-unity PLQY (96.2%), and green emission was also achieved with (18C6@K)<sub>2</sub>ZrCl<sub>4</sub>Br<sub>2</sub> powders at a PLQY of 82.7%. These highly emissive powders feature facile low-temperature solution-based synthesis conditions and maintain high PLQY in solution-processable semiconductor inks under ambient conditions, and they were used in thin-film displays and emissive three-dimensional-printed architectures that exhibited high spatial resolution.