(γ-Methoxy propyl amine)2PbBr4: a novel two-dimensional halide hybrid perovskite with efficient bluish white-light emission

White-light emission in lead halide hybrid perovskites has attracted increasing attention due to their significant applications in the field of light-emitting devices. Despite tremendous efforts, two-dimensional (2D) white-light emissive perovskites with high photoluminescence quantum efficiency (PL...

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Published inInorganic chemistry frontiers Vol. 8; no. 8; pp. 2119 - 2124
Main Authors Li, Yezhan, Ji, Chengmin, Li, Lina, Wang, Sasa, Han, Shiguo, Yu, Peng, Zhang, Shuhua, Luo, Junhua
Format Journal Article
LanguageEnglish
Published London Royal Society of Chemistry 21.04.2021
Subjects
Cations
Crystallography
Excitation spectra
Excitons
Inorganic chemistry
Lead compounds
Light
Light emission
Metal halides
Perovskites
Photoluminescence
Quantum efficiency
White light
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Summary:White-light emission in lead halide hybrid perovskites has attracted increasing attention due to their significant applications in the field of light-emitting devices. Despite tremendous efforts, two-dimensional (2D) white-light emissive perovskites with high photoluminescence quantum efficiency (PLQE) remain scarce. In this work, by using alkoxyamine organic cations as a template, we successfully synthesized a new 2D layered hybrid perovskite, (γ-methoxy propyl amine)2PbBr4 (γ-MPAPB), which exhibits bright bluish white-light emission with an excellent color rendering index (CRI) of 85 and a high PLQE of 6.85%. Photoluminescence measurements show a correlation between self-trapped excitons and white-light emission. To the best of our knowledge, this is the first demonstration of a 2D hybrid perovskite with efficient white-light emission based on alkoxyamine cations. This work emphasizes the strategy of introducing alkoxyamine cations into 2D layered hybrid perovskites to design efficient white-light emissive perovskite semiconductors.
ISSN:2052-1545
2052-1553
DOI:10.1039/d0qi01446j