Supramolecular assembly of blue and green halide perovskites with near-unity photoluminescence

• 成果类型: Article
• 署名作者: Zhu, Cheng; Jin, Jianbo; Wang, Zhen; Xu, Zhenpeng; Folgueras, Maria C.; Jiang, Yuxin; Uzundal, Can B.; Le, Han K. D.; Wang, Feng; Zheng, Xiaoyu (Rayne); Yang, Peidong
• 署名单位: University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; University of California System; University of California Berkeley; University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11242
• DOI: 10.1126/science.adi4196
• 发表日期: 2024-01-05
• 页码: 86-93
• 关键词: optical-properties; defect tolerance; room-temperature; binding-energy; quantum yield; nanocrystals; emission; exchange; br; cl

摘要

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)(2)HfBr6 powders showed blue emission with a near-unity PLQY (96.2%), and green emission was also achieved with (18C6@K)(2)ZrCl4Br2 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.