Mechanochemistry-driven engineering of 0D/3D heterostructure for designing highly luminescent Cs–Pb–Br perovskites

• Published in: Nature communications Vol. 13; no. 1; p. 4263
• Main Authors: Baek, Kyeong-Yoon, Lee, Woocheol, Lee, Jonghoon, Kim, Jaeyoung, Ahn, Heebeom, Kim, Jae Il, Kim, Junwoo, Lim, Hyungbin, Shin, Jiwon, Ko, Yoon-Joo, Lee, Hyeon-Dong, Friend, Richard H., Lee, Tae-Woo, Lee, Jeongjae, Kang, Keehoon, Lee, Takhee
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 23-07-2022; Nature Publishing Group; Nature Portfolio
• Subjects: 140/131; 140/133; 147/135; 147/143; 639/301/1005; 639/301/357/995; 639/638/298/398; Cesium; Configurations; Embedding; Emissions; Emitters; Engineering; Heterostructures; Humanities and Social Sciences; Laboratories; Lead; Luminescence; Metal halides; multidisciplinary; Optical properties; Perovskites; Science; Science (multidisciplinary); Synthesis
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-022-31924-x

Embedding metal-halide perovskite particles within an insulating host matrix has proven to be an effective strategy for revealing the outstanding luminescence properties of perovskites as an emerging class of light emitters. Particularly, unexpected bright green emission observed in a nominally pure zero-dimensional cesium–lead–bromide perovskite (Cs
4
PbBr
6
) has triggered intensive research in better understanding the serendipitous incorporation of emissive guest species within the Cs
4
PbBr
6
host. However, a limited controllability over such heterostructural configurations in conventional solution-based synthesis methods has limited the degree of freedom in designing synthesis routes for accessing different structural and compositional configurations of these host–guest species. In this study, we provide means of enhancing the luminescence properties in the nominal Cs
4
PbBr
6
powder through a guided heterostructural configuration engineering enabled by solid-state mechanochemical synthesis. Realized by an in-depth study on time-dependent evaluation of optical and structural properties during the synthesis of Cs
4
PbBr
6
, our target-designed synthesis protocol to promote the endotaxial formation of Cs
4
PbBr
6
/CsPbBr
3
heterostructures provides key insights for understanding and designing kinetics-guided syntheses of highly luminescent perovskite emitters for light-emitting applications.
While emission and stability of metal–halide perovskites can be enhanced through heterostructural encapsulation, a controlled synthesis route to such structures is not trivial to realize. Here, the authors design a mechanochemistry-driven protocol for synthesizing highly luminescent CsPbBr
3
/Cs
4
PbBr
6
heterostructures.