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Extremely Stable Luminescent Crosslinked Perovskite Nanoparticles under Harsh Environments over 1.5 Years
Author(s) -
Jang Junho,
Kim YoungHoon,
Park Sunjoong,
Yoo Dongsuk,
Cho Hyunjin,
Jang Jinhyeong,
Jeong Han Beom,
Lee Hyunhwan,
Yuk Jong Min,
Park Chan Beum,
Jeon Duk Young,
Kim YongHyun,
Bae ByeongSoo,
Lee TaeWoo
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202005255
Subject(s) - materials science , perovskite (structure) , luminescence , nanoparticle , photoluminescence , chemical engineering , nanotechnology , quantum yield , fluorescence , optoelectronics , physics , quantum mechanics , engineering
Organic–inorganic hybrid perovskite nanoparticles (NPs) are a very strong candidate emitter that can meet the high luminescence efficiency and high color standard of Rec.2020. However, the instability of perovskite NPs is the most critical unsolved problem that limits their practical application. Here, an extremely stable crosslinked perovskite NP (CPN) is reported that maintains high photoluminescence quantum yield for 1.5 years (>600 d) in air and in harsher liquid environments (e.g., in water, acid, or base solutions, and in various polar solvents), and for more than 100 d under 85 °C and 85% relative humidity without additional encapsulation. Unsaturated hydrocarbons in both the acid and base ligands of NPs are chemically crosslinked with a methacrylate‐functionalized matrix, which prevents decomposition of the perovskite crystals. Counterintuitively, water vapor permeating through the crosslinked matrix chemically passivates surface defects in the NPs and reduces nonradiative recombination. Green‐emitting and white‐emitting flexible large‐area displays are demonstrated, which are stable for >400 d in air and in water. The high stability of the CPN in water enables biocompatible cell proliferation which is usually impossible when toxic Pb elements are present. The stable materials design strategies provide a breakthrough toward commercialization of perovskite NPs in displays and bio‐related applications.